CN104039959A - Polypeptides having xylanase activity and polynucleotides encoding same - Google Patents

Polypeptides having xylanase activity and polynucleotides encoding same Download PDF

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CN104039959A
CN104039959A CN201280066579.0A CN201280066579A CN104039959A CN 104039959 A CN104039959 A CN 104039959A CN 201280066579 A CN201280066579 A CN 201280066579A CN 104039959 A CN104039959 A CN 104039959A
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polypeptide
polynucleotide
sequence
enzyme
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张羽
段俊欣
刘晔
汤岚
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Novozymes Inc
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/14—Hydrolases (3)
    • C12N9/24—Hydrolases (3) acting on glycosyl compounds (3.2)
    • C12N9/2402—Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
    • C12N9/2477—Hemicellulases not provided in a preceding group
    • C12N9/248—Xylanases
    • C12N9/2482—Endo-1,4-beta-xylanase (3.2.1.8)
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00—Preparation of compounds containing saccharide radicals
    • C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Y—ENZYMES
    • C12Y302/00—Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
    • C12Y302/01—Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
    • C12Y302/01008—Endo-1,4-beta-xylanase (3.2.1.8)

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Abstract

Provided are isolated polypeptides having xylanase activity, catalytic domains and cellulose binding domains, and polynucleotides encoding the polypeptides, catalytic domains or cellulose binding domains. Also provided are nucleic acid constructs, vectors and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides, catalytic domains or cellulose binding domains.

Description

There are the polypeptide of xylanase activity and the polynucleotide of this polypeptide of coding
For the statement of the right of the invention completing under the research and development of federal funding
The present invention has supported with government under the cooperation agreement of being authorized by USDOE (Cooperative Agreement) DE-FC36-08GO18080.Government has certain right in the present invention.
Relate to sequence table
The sequence table that the application comprises computer-reader form, it is incorporated to herein by carrying stating.
Background of invention
Description of related art
Ligno-cellulose, maximum renewable biomass resource, is mainly made up of xylogen, Mierocrystalline cellulose and hemicellulose in the world, and wherein the major part of hemicellulose is xylan.For example, inside β-Isosorbide-5-Nitrae-wood sugar glycosidic bond in zytase (interior-Isosorbide-5-Nitrae-xylobiase, EC3.2.1.8) hydrolyzed xylan enzyme is to produce wood sugar and the wood oligose (xylo-oligomer) of lower molecular weight.Xylan is the polysaccharide forming from the D-wood sugar pyranose (Isosorbide-5-Nitrae-β-glycoside-linked D-xylopyranose) of Isosorbide-5-Nitrae-β-glucoside connection.
Mierocrystalline cellulose is that glucose passes through the polymkeric substance that β-Isosorbide-5-Nitrae-key connects.The enzyme of the dextran of many microorganisms hydrolysis β-connections.These enzymes comprise endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.Endoglucanase, at random site digest cellulose polymkeric substance, makes it be exposed to cellobiohydrolase and attacks (attack).Cellobiohydrolase sequentially discharges the molecule of cellobiose from the end of cellulose polymer compound.Cellobiose is the glucose dimer of water miscible β-Isosorbide-5-Nitrae-connection.Cellobiose is hydrolyzed into glucose by beta-glucosidase enzyme.
Lignocellulose-containing raw material (lignocellulosic feedstock) is converted into ethanol and there is following advantage: large content of starting materials is ready-made available, avoids burning or the desirability of embedding material and the spatter property of alcohol fuel.Timber, agricultural residue, draft crop and municipal solid waste are considered to the raw material for alcohol production.These material three major polymers: celluloses, hemicellulose and xylogen composition.Once cellulose conversion is glucose, described glucose can be easily ethanol by yeast fermentation.
Exist in this area by supplementing other enzyme and improve cellulose decomposition enzyme composition to increase efficiency and the demand that is provided for the cellulosic enzyme solution to one's profit of xylogen degradation.
The invention provides and there are the polypeptide of xylanase activity and the polynucleotide of coding said polypeptide.
Technical field
The present invention relates to have the polypeptide of xylanase activity, catalytic domain, and cellulose binding domain, and coding said polypeptide, catalytic domain, and the polynucleotide of cellulose binding domain.The present invention also relates to the nucleic acid construct, carrier and the host cell that comprise described polynucleotide, and produces and use described polypeptide, catalytic domain, and the method for cellulose binding domain.
Summary of the invention
The present invention relates to have the isolated polypeptide of xylanase activity, it is selected from lower group:
(a) polypeptide, the mature polypeptide of itself and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6 and SEQ ID NO:8 has at least 60% sequence identity;
(b) polypeptide, it is by polynucleotide encoding, described polynucleotide are hybridized with following under at least medium-Gao stringent condition: (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (ii) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, or (iii) (i) or total length complement (ii).
(c) polypeptide, it is by polynucleotide encoding, described polynucleotide and SEQ ID NO:1, SEQ ID NO:3 or its cDNA sequence, SEQ ID NO:5 or its cDNA sequence, or the mature polypeptide encoded sequence of SEQ ID NO:7 or its cDNA sequence has at least 60% sequence identity;
(d) SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 for example, comprises the variant of replacement, disappearance and/or insertion in one or more (several) position; With
(e) (a), (b), (c) or polypeptide (d) have the fragment of xylanase activity.
The present invention also relates to isolated polypeptide, and described isolated polypeptide comprises catalytic domain, and described catalytic domain is selected from lower group:
(a) catalytic domain, the amino acid 21 to 366 of itself and SEQ ID NO:6 has at least 60% sequence identity;
(b) catalytic domain, it is by polynucleotide encoding, and described polynucleotide are hybridized with following under at least high stringent condition: the Nucleotide 61 to 1423 of SEQ ID NO:5 or its total length complement;
(c) catalytic domain, it is by polynucleotide encoding, and the Nucleotide 61 to 1423 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity;
(d) variant that the amino acid 21 to 366 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; With
(e) (a), (b), (c) or catalytic domain (d) have the variant of cellulolytic enhancing activity.
The present invention also relates to isolated polypeptide, and described isolated polypeptide comprises sugar in conjunction with territory, and described sugar is selected from lower group in conjunction with territory:
(a) sugar is in conjunction with territory, and the amino acid 494 to 529 of itself and SEQ ID NO:6 has at least 60% sequence identity;
(b) sugar is in conjunction with territory, and it is by polynucleotide encoding, and described polynucleotide are hybridized with following under at least high stringent condition: the Nucleotide 1805 to 1912 of SEQ ID NO:5 or its total length complement;
(c) sugar is in conjunction with territory, and it is by polynucleotide encoding, and the Nucleotide 1805 to 1912 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity;
(d) variant that the amino acid 494 to 529 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; With
(e) (a), (b), (c) or sugar (d) have sugar in conjunction with active variant in conjunction with territory.
The present invention also relates to the polynucleotide of the separation of the polypeptide of the present invention of encoding, the nucleic acid construct that comprises described polynucleotide, recombinant expression vector and recombinant host cell; With the method that produces described polypeptide.
The present invention also relates to degradation of fibers cellulosic material or the technique containing xylan material, and it comprises: under the existence of the polypeptide with xylanase activity of the present invention, process cellulose materials or contain xylan material with enzyme composition.In one aspect, described technique also comprises the cellulose materials reclaiming through degrading or transform or contains xylan material.
The present invention also relates to the technique that produces tunning, and it comprises: (a) under the existence of the polypeptide with xylanase activity of the present invention, use enzyme composition diastatic fiber cellulosic material or contain xylan material; (b) with the fermentation of one or more (for example several) organism of fermentation through the cellulose materials of saccharification or containing xylan material to produce tunning; (c) reclaim this tunning from fermentation.
The present invention also relates to fermented cellulose material or the technique containing xylan material, it for example comprises, with ferment described cellulose materials or containing xylan material of one or more (several) organism of fermentation, wherein said cellulose materials or be to have under the existence of polypeptide of xylanase activity with enzyme composition saccharification in the present invention containing xylan material.In one aspect, described cellulose materials or the fermentation containing xylan material produce tunning.In yet another aspect, above-mentioned technique further comprises from fermentation recovery tunning.
The present invention also relates to the polynucleotide of coded signal peptide, described signal peptide comprises or consists of the amino acid/11 to 18 of (consist of) SEQ ID NO:2, the amino acid/11 to 16 of SEQ ID NO:4, the amino acid/11 to 20 of SEQ ID NO:6, or the amino acid/11 to 21 of SEQ ID NO:8, it is operably connected to the gene of proteins encoded, and wherein said albumen is external source for described signal peptide; The nucleic acid construct, expression vector and the recombinant host cell that comprise described polynucleotide; With the protedogenous method of product.
Brief description of the drawings
Fig. 1 shows the estriction map of pGH30_PE04230001859.
Fig. 2 shows the estriction map of pGH30_ZY577259_44.
Fig. 3 shows the estriction map of pGH5_ZY569164_12.
Fig. 4 shows the estriction map of pGH5_ZY569165_85.
Definition
Acetyl xylan esterase: term " acetyl xylan esterase " means Carboxylesterase (EC3.1.1.72), its catalysis ethanoyl is from the hydrolysis of polymerization xylan, acetylize wood sugar, acetyl glucose, acetic acid α-naphthylacetate (alpha-napthyl acetate) and acetic acid p-nitrophenyl acetate (p-nitrophenyl acetate).For the present invention, acetyl xylan esterase activity is to use to contain 0.01%TWEEN tM0.5mM acetic acid p-nitrophenyl acetate in the 50mM sodium acetate pH5.0 of 20 (polyoxyethylenesorbitan monolaurates) is determined as substrate.The acetyl xylan esterase of a unit is defined as can be at pH5, and 25 DEG C of per minutes discharge the enzyme amount of 1 micromole's p-NP negatively charged ion (p-nitrophenolate anion).
Allelic variant (allelic variant): term " allelic variant " means any two or more optional forms of the gene that occupies phase syntenic genes seat.Allelic variation occurs natively by sudden change, and can cause the polymorphism in population.Transgenation can be the polypeptide of reticent (unchanged in the polypeptide of the coding) aminoacid sequence with change of maybe can encoding.The allelic variant of polypeptide is the polypeptide by the allelic variant coding of gene.
α-l-arabfuranglycosidase: term " α-l-arabfuranglycosidase " means the Arabic furans lytic enzyme of α-L-arbinofuranose glycosides (EC3.2.1.55), the hydrolysis of its catalysis to the end irreducibility α-L-arbinofuranose glycosides residue in α-L-arabinose glycosides.This enzyme to α-L-arbinofuranose glycosides, contain (1,3)-and/or α-L-arabinan, araboxylan and the arabogalactan of (1,5)-key work.α-l-arabfuranglycosidase is also referred to as arabinofuranosidase/xylosidase, α-arabinofuranosidase/xylosidase, α-L-arabinose glycosides enzyme, α-arabinofuranosidase, polysaccharide α-l-arabfuranglycosidase, α-L-arbinofuranose glycosides lytic enzyme, L-arabinose glycosides enzyme or α-L-arabanase.For the present invention, α-l-arabfuranglycosidase activity is medium-viscosity wheat araboxylan (the Megazyme International Ireland that uses 5mg in the 100mM sodium acetate pH5 of the every ml in cumulative volume 200 μ l, Ltd., Bray, Co.Wicklow, Ireland) carry out 30 minutes at 40 DEG C, then pass through the pectinose analysis of column chromatography (Bio-Rad Laboratories, Inc., Hercules, CA, USA) is determined.
Alpha-glucuronidase: term " alpha-glucuronidase " means α-D-glucuronide glucuronic acid lytic enzyme (alpha-D-glucosiduronate glucuronohydrolase) (EC3.2.1.139), its catalysis α-D-glucuronic acid glycoside hydrolysis is D-glucuronic acid and alcohol.For the present invention, alpha-glucuronidase activity is according to de Vries, and 1998, J.Bacteriol.180:243-249 determines.The alpha-glucuronidase of a unit equals can be at pH5, and 40 DEG C of per minutes discharge the enzyme amount of 1 micromole's glucuronic acid or 4-O-methylglucuronic acid.
Beta-glucosidase enzyme: term " beta-glucosidase enzyme " means β-D-glucoside glucose lytic enzyme (beta-D-glucoside glucohydrolase) (E.C.No.3.2.1.21), the hydrolysis of the non-reduced β-D-Glucose of its catalysis end residue, and discharge β-D-Glucose.For the present invention, beta-glucosidase enzyme is according to Venturi etc., 2002, Extracellular beta-D-glucosidase from Chaetomium thermophilum var.coprophilum:production, purification and some biochemical properties, the method for J.Basic Microbiol.42:55-66 is used p-nitrophenyl-β-D-glucose pyranoside to determine as substrate.The beta-glucosidase enzyme of a unit is defined as at 25 DEG C, and pH4.8 is containing 0.01% 50mM Trisodium Citrate in produce 1.0 micromole's p-NP negatively charged ion from the 1mM p-nitrophenyl-β-D-glucose pyranoside per minute as substrate.
Xylobiase: term " xylobiase " means β-D-xyloside wood sugar lytic enzyme (β-D-xyloside xylohydrolase) (E.C.3.2.1.37), and the outer hydrolysis of the short β of its catalysis (1 → 4) wood oligose (xylooligosaccharide) is to remove continuous D-xylose residues from non-reducing end.For the present invention, the xylobiase of a unit is defined as at 40 DEG C, and pH5 is containing 0.01% 100mM Trisodium Citrate in produce 1.0 micromole's p-NP negatively charged ion from the 1mM p-nitrophenyl-β-D-xyloside per minute as substrate.
Sugared in conjunction with territory: term " sugar is in conjunction with territory " means the region of the enzyme of the combination that mediates for example, pars amorpha to sugared substrate (, Mierocrystalline cellulose) of enzyme.Sugar, in conjunction with territory (CBD), is also called carbohydrate binding modules, conventionally sees N-terminal or the C-terminal of enzyme.
Catalytic domain: term " catalytic domain " means the region of the enzyme of the catalysis mechanism (catalytic machinery) of containing enzyme.
CDNA: term " cDNA " means the DNA molecular that can prepare from deriving from the mRNA molecule ripe, montage of eucaryon or prokaryotic cell prokaryocyte by reverse transcription.CDNA lacks the intron sequences being conventionally present in corresponding gene group DNA.The precursor that initial (initial) elementary rna transcription thing is mRNA, it comprises montage by a series of step processing, then occurs as the mRNA of ripe montage.
Cellobiohydrolase: term " cellobiohydrolase " means 1, 4-callose cellobiohydrolase (1, 4-beta-D-glucan cellobiohydrolase) (E.C.3.2.1.91 and E.C.3.2.1.176), its catalyse cellulose, cell-oligosaccharide, or any β-1 that comprises, in the polymkeric substance of the glucose that 4-connects 1, the hydrolysis of 4-β-D-glycosidic link, discharge cellobiose (Teeri from reducing end (cellobiohydrolase I) or the non-reducing end (cellobiohydrolase II) of chain, 1997, Crystalline cellulose degradation:New insight into the function of cellobiohydrolases, Trends in Biotechnology15:160-167, Teeri etc., 1998, Trichoderma reesei cellobiohydrolases:why so efficient on crystalline cellulose?, Biochem.Soc.Trans.26:173-178).According to Lever etc., 1972, Anal.Biochem.47:273-279; Van Tilbeurgh etc., 1982, FEBS Letters149:152-156; Van Tilbeurgh and Claeyssens, 1985, FEBS Letters187:283-288; And Tomme etc., the method that 1988, Eur.J.Biochem.170:575-581 describes is determined cellobiohydrolase activity.In the present invention, the method for Tomme etc. can be used for determining cellobiohydrolase activity.
Cellulolytic enzyme or cellulase: term " cellulolytic enzyme " or " cellulase " mean the enzyme of one or more (for example several) hydrolysis fiber cellulosic material.This fermentoid comprises endoglucanase, cellobiohydrolase, beta-glucosidase enzyme, or its combination.Two kinds of basic skills measuring cellulolytic activity comprise: (1) measures total fiber element degrading activity, (2) measure independent cellulolytic activity (endoglucanase, cellobiohydrolase and beta-glucosidase enzyme), as Zhang etc., Outlook for cellulase improvement:Screening and selection strategies, 2006, Biotechnology Advances24:452-481 summarizes.Total fiber element degrading activity typically uses that insoluble substrate measures, and described substrate comprises Whatman1 filter paper, Microcrystalline Cellulose, bacteria cellulose, algae Mierocrystalline cellulose, cotton, pretreated ligno-cellulose etc.Modal total fiber element degrading activity assay method is to use the filter paper assay method of Whatman1 filter paper as substrate.This assay method is by International Union of Pure and Applied Chemistry (IUPAC) (Ghose, 1987, Measurement of cellulase activities, Pure Appl.Chem.59:257-68) establish.
For the present invention, cellulose decomposition enzymic activity is determined than the increase of the contrast hydrolysis of not adding cellulose decomposition zymoprotein by measuring the cellulosic material hydrolysis being undertaken by cellulolytic enzyme under the following conditions: Mierocrystalline cellulose in the PCS of cellulose decomposition zymoprotein/g of 1-50mg (or other pretreated cellulose materials) is in suitable temperature, and for example 50 DEG C, 55 DEG C or 60 DEG C are carried out 3-7 day.Usual conditions are: 1ml reaction solution, and through washing or unwashed PCS, 5% insoluble solid, 50mM sodium acetate pH5,1mM MnSO 4, 50 DEG C, 55 DEG C or 60 DEG C, 72 hours, pass through post (Bio-Rad Laboratories, Inc., Hercules, CA, USA) carries out glycan analysis.
Cellulose materials: term " cellulose materials " means to comprise cellulosic any material.Secondly main polysaccharide in the primary cell wall (primary cell wall) of biomass is Mierocrystalline cellulose, and the abundantest is hemicellulose, and the 3rd be pectin.Secondary cell wall (secondary cell wall) produces after cell stops growing, and it contains equally polysaccharide and strengthens by the polymerization xylogen that is covalently cross-linking to hemicellulose.Mierocrystalline cellulose is the homopolymer of anhydro cellobiose, therefore be straight chain β-(1-4)-D-dextran, and hemicellulose comprises multiple compounds, for example xylan, xyloglucan (xyloglucan), araboxylan and mannosans, form and have diversified substituent complex branches structure.Although normally multiform of Mierocrystalline cellulose, the Mierocrystalline cellulose being present in plant tissue is mainly the insoluble crystal substrate of parallel dextran chain.Hemicellulose is connected with hydrogen bond with Mierocrystalline cellulose and other hemicellulose conventionally, and it helps stabilized cell wall matrix.
Mierocrystalline cellulose sees stem, leaf, shell, skin and the cob of for example plant conventionally, or leaf, branch and the timber of tree.Cellulose materials can be, but be not limited to, agricultural residue, draft material (comprising energy crop), municipal solid waste, paper pulp and paper mill resistates, waste paper and timber (comprising forestry resistates) (referring to, for example, Wiselogel etc., 1995, in Handbook on Bioethanol (Charles E.Wyman volume), pp.105-118, Taylor & Francis, Washington D.C.; Wyman, 1994, Bioresource Technology50:3-16; Lynd, 1990, Applied Biochemistry and Biotechnology24/25:695-719; Mosier etc., 1999, Recent Progress in Bioconversion of Lignocellulosics, in Advances in Biochemical Engineering/Biotechnology, T.Scheper chief editor, Volume65, pp.23-40, Springer-Verlag, New York).It should be understood that in this article Mierocrystalline cellulose can be the form of ligno-cellulose, ligno-cellulose is the Plant cell wall material that comprises xylogen, Mierocrystalline cellulose and hemicellulose in mixed-matrix.One preferred aspect, cellulose materials is any biological material.Another preferred aspect, described cellulose materials is ligno-cellulose, it comprises Mierocrystalline cellulose, hemicellulose and xylogen.
In one aspect, cellulose materials is agricultural residue.In yet another aspect, cellulose materials is draft material (comprising energy crop).In yet another aspect, cellulose materials is municipal solid waste.In yet another aspect, cellulose materials is paper pulp and paper mill resistates.In yet another aspect, cellulose materials is waste paper.In yet another aspect, cellulose materials is timber (comprising forestry resistates).
In yet another aspect, cellulose materials is giantreed (arundo).In yet another aspect, cellulose materials is bagasse.In yet another aspect, cellulose materials is bamboo.In yet another aspect, cellulose materials is corn cob.In yet another aspect, cellulose materials is zein fiber.In yet another aspect, cellulose materials is maize straw.In yet another aspect, cellulose materials is that Chinese silvergrass belongs to.In yet another aspect, cellulose materials is orange peel.In yet another aspect, cellulose materials is rice straw.In yet another aspect, cellulose materials is switchgrass (switch grass).In yet another aspect, cellulose materials is straw.
In yet another aspect, cellulose materials is white poplar.In yet another aspect, cellulose materials is eucalyptus.In yet another aspect, cellulose materials is fir (fir).In yet another aspect, cellulose materials is pine tree.In yet another aspect, cellulose materials is willow.In yet another aspect, cellulose materials is dragon spruce.In yet another aspect, cellulose materials is willow.
In yet another aspect, cellulose materials is algae Mierocrystalline cellulose.In yet another aspect, cellulose materials is bacteria cellulose.In yet another aspect, cellulose materials is velveteen (cotton linter).In yet another aspect, cellulose materials is filter paper.In yet another aspect, cellulose materials is Microcrystalline Cellulose.In yet another aspect, cellulose materials is the acid-treated Mierocrystalline cellulose of phosphorus.
In yet another aspect, cellulose materials is hydrobiont matter.As for herein, " hydrobiont matter " means the biomass that produced by photosynthesis process in aquatic environment.Hydrobiont matter can be algae, emergent (emergent plant), floatingleaved plant (floating-leaf plant) or submerged plant (submerged plant).
Cellulose materials in statu quo (as is) uses or carries out pre-treatment, and pre-treatment is used ordinary method known in the art, as described herein.One preferred aspect, pretreatment of fiber cellulosic material.
Encoding sequence: term " encoding sequence " means the polynucleotide of the aminoacid sequence of directly specifying polypeptide.The border of encoding sequence determines by open reading frame conventionally, and described open reading frame starts as ATG, GTG or TTG with initiator codon, and finishes as TAA, TAG or TGA with terminator codon.Encoding sequence can be genomic dna, cDNA, synthetic DNA or its combination.
Regulating and controlling sequence (control sequence): it is essential nucleotide sequence that term " regulating and controlling sequence " means the polynucleotide of the mature polypeptide of the present invention of encoding to express.Each regulating and controlling sequence can be (, from different genes) of natural (, from same gene) or external source for the polynucleotide of the described mature polypeptide of coding, or each regulating and controlling sequence is for can be natural or external source each other.These regulating and controlling sequences include but not limited to leader sequence, polyadenylation sequence, propeptide sequence, promotor, signal peptide sequence and transcription terminator.At least, regulating and controlling sequence comprises promotor and the termination signal of transcribing and translating.Regulating and controlling sequence can be equipped with the joint for introducing specificity restriction site, and described specificity restriction site promotes being connected of polynucleotide encoding district of regulating and controlling sequence and coded polypeptide.
Endoglucanase: term " endoglucanase " means inscribe-Isosorbide-5-Nitrae-(1,3; 1,4)-callose 4-glucan hydrolase (endo-1,4-β-D-glucan4-glucanohydrolase) (E.C.3.2.1.4), for example, in its catalyse cellulose, derivatived cellulose (carboxymethyl cellulose and Natvosol), moss starch (lichenin) 1, β-1 of 4-β-D-glycosidic link, mixing, the interior hydrolysis (endohydrolysis) of the β-Isosorbide-5-Nitrae key in for example cereal callose of 3 dextran or xyloglucan and other vegetable material of containing cellulosic component.Endoglucanase activity can be by measuring the minimizing of substrate viscosity or being increased and determined by the definite reducing end of reducing sugar test method (Zhang etc., 2006, Biotechnology Advances24:452-481).For the present invention, according to Ghose, the method for 1987, Pure and Appl.Chem.59:257-268, at pH5,40 DEG C use carboxymethyl cellulose (CMC) to determine endoglucanase activity as substrate.
Express: term " expressions " comprises any step that relates to polypeptide generation, it includes but not limited to transcribe, post transcriptional modificaiton, translation, posttranslational modification and secretion.
Expression vector: term " expression vector " means DNA molecular linear or ring-type, the polynucleotide that it comprises coded polypeptide, and described polynucleotide are operably connected with the regulating and controlling sequence that is provided for its expression.
Family's 61 glycoside hydrolases: term " family's 61 glycoside hydrolases " or " GH61 of family " or " GH61 " are defined as the B. according to Henrissat in this article, 1991, A classification of glycosyl hydrolases based on amino-acid sequence similarities, Biochem.J.280:309-316, and Henrissat B. and Bairoch A., 1996, Updating the sequence-based classification of glycosyl hydrolases, Biochem.J.316:695-696 belongs to the polypeptide of glycoside hydrolysis enzyme family 61.The first very weak inscribe-Isosorbide-5-Nitrae-β-D dextranase activity based on measuring a family member and classify as glycoside hydrolysis enzyme family of proenzyme in this family.The structure of these enzymes and binding mode are non-classical, and they cannot be considered as real (bona fide) Glycosylase.But based in the time together using with the mixture of cellulase or cellulase, it strengthens the ability that ligno-cellulose decomposes, they are retained in CAZy classification.
Feruloyl esterase: term " feruloyl esterase (feruloyl esterase) " means 4-hydroxy-3-methoxy cinnyl-glycosylhydrolase (EC3.1.1.73), its catalysis 4-hydroxy-3-methoxy cinnyl (asafoetide acyl) group is from the hydrolysis of the sugar (it is generally pectinose " natural biomass " substrate) of esterification, to produce forulic acid (Ferulic acid).Feruloyl esterase is also referred to as feruloyl esterase (ferulic acid esterase), hydroxyl cinnamoyl esterase, FAE-III, laurate lytic enzyme, FAEA, cinnAE, FAE-I or FAE-II.For the present invention, ferulaic acid esterase activity is to use the 0.5mM forulic acid p-nitrophenyl ester in 50mM sodium acetate pH5.0 to determine as substrate.The feruloyl esterase of a unit equals can be at pH5, and 25 DEG C of per minutes discharge the enzyme amount of 1 micromole's p-NP negatively charged ion.
Fragment: term " fragment " for example means, from the amino acid whose polypeptide of the amino of mature polypeptide and/or carboxyl-terminal deletion one or more (several); Wherein said fragment has xylanase activity.In one aspect, at least 375 amino-acid residues that fragment contains SEQ ID NO:2, for example at least 400 amino-acid residues, or at least 425 amino-acid residues.In yet another aspect, at least 385 amino-acid residues that fragment contains SEQ ID NO:4, for example at least 410 amino-acid residues or at least 435 amino-acid residues.In yet another aspect, at least 435 amino-acid residues that fragment contains SEQ ID NO:6, for example at least 460 amino-acid residues or at least 485 amino-acid residues.In yet another aspect, at least 400 amino-acid residues that fragment contains SEQ ID NO:8, for example at least 420 amino-acid residues or at least 440 amino-acid residues.
Hemicellulose lytic enzyme or hemicellulase: term " hemicellulose lytic enzyme " or " hemicellulase " mean the enzyme of one or more (for example several) hydrolyzed hemicellulose materials.Referring to, for example Shallom D. and Shoham Y.Microbial hemicellulases.Current Opinion In Microbiology, 2003,6 (3): 219-228).Hemicellulase is the key component in Degrading plant biomass.The example of hemicellulase includes but not limited to acetyl mannan esterase, acetyl xylan esterase, arabanase, arabinofuranosidase, coumaric acid esterase, feruloyl esterase, tilactase, glucuronidase, glucuronic acid esterase, mannonase mannosidase, zytase and xylosidase.The substrate of these enzymes, hemicellulose is the group that mixes of branching and straight-chain polysaccharide, and these polysaccharide are the cellulose micro-fibers in plant cell wall by hydrogen bonding, and cross-linking is the network of robust (robust).Hemicellulose also covalently invests xylogen, with the together structure of height of formation complexity of Mierocrystalline cellulose.The changeable structure of hemicellulose and organizational form need the synergy of many enzymes to make it degradable.The catalytic module of hemicellulase is the glycoside hydrolase (GH) of hydrolysis sugar glycosidic bond, or the sugar ester enzyme (CE) of the ester of hydrolysis acetic acid or forulic acid side group connection.These catalytic module, based on the homology of its primary structure, can be assigned as GH and CE family.Some families, have generally and similarly fold, and can further classify as clan (clan), for example, with alphabetic flag (, GH-A).The classification of tool informedness and up-to-date these and other sugared organized enzymes can obtain at Carbohydrate-Active Enzymes (CAZy) database.Hemicellulose lytic enzyme activity can be according to Ghose and Bisaria, and 1987, Pure & Appl.Chem.59:1739-1752 is in suitable temperature, and for example 50 DEG C, 55 DEG C or 60 DEG C, and pH, for example 5.0 or 5.5 measure.
High stringent condition: term " high stringent condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 50% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 65 DEG C, each 15 minutes.
Host cell: term " host cell " means to be suitable for to use that the nucleic acid construct or the expression vector that comprise polynucleotide of the present invention transform, the cell type of transfection, transduction etc.Any owing to being different from the offspring of parental cell in the sudden change that copies middle generation of parental cell contained in term " host cell ".
Separate: term " separation " means the material so that form or the environment in nature appearance do not exist.The non-limiting example of the material separating comprises the material that (1) any non-natural exists, (2) any at least in part with one or more or material that all the naturally occurring composition followed natural with it departs from, include but not limited to any enzyme, variant, nucleic acid, protein, peptide or cofactor; (3) anyly for being seen this material of occurring in nature, passed through manually modified material; Or (4) are any, and by increase this amount of substance with respect to other components of following natural with it, (for example, the restructuring in host cell produces; The encode multiple copied of gene of this material; And use than the promotor stronger with the natural promotor of following of gene of this material of coding) and the material of modification.
Low stringency condition: term " low stringency condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 25% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 50 DEG C, each 15 minutes.
Mature polypeptide: term " mature polypeptide " means the polypeptide that the final form after translation and any posttranslational modification exists with it, such as N-end processing of described modification, the brachymemma of C-end, glycosylation, phosphorylation etc.In one aspect, SignalP program (Nielsen etc. of signal peptide according to the amino acid/11 to 18 of prediction SEQ ID NO:2 (P24HGN), 1997, Protein Engineering10:1-6), mature polypeptide is the amino acid/11 9 to 475 of SEQ ID NO:2.In yet another aspect, are SignalP programs of signal peptide according to the amino acid/11 to 16 of prediction SEQ ID NO:4 (P24EKK), mature polypeptide is the amino acid/11 7 to 477 of SEQ ID NO:4.In yet another aspect, are SignalP programs of signal peptide according to the amino acid/11 to 20 of prediction SEQ ID NO:6 (P241M1), mature polypeptide is the amino acid 21 to 529 of SEQ ID NO:6.In yet another aspect, are SignalP programs of signal peptide according to the amino acid/11 to 21 of prediction SEQ ID NO:8 (P241KZ), mature polypeptide is the amino acid 22 to 480 of SEQ ID NO:8.Be known in the art the mixture that host cell can produce two or more different mature polypeptides (having different C end and/or N terminal amino acid) of being expressed by identical polynucleotide.
Mature polypeptide encoded sequence: term " mature polypeptide encoded sequence " means coding and have the polynucleotide of mature polypeptide of xylanase activity.In one aspect, according to the SignalP program (Nielsen etc. of Nucleotide 1 to the 54 coded signal peptide of prediction SEQ ID NO:1 (D82SK3), 1997, on seeing), mature polypeptide encoded sequence is the Nucleotide 55 to 1425 of SEQ ID NO:1.In yet another aspect, according to the SignalP program of Nucleotide 1 to the 48 coded signal peptide of prediction SEQ ID NO:3 (D82MAM), mature polypeptide encoded sequence is the Nucleotide 49 to 1512 of SEQ ID NO:3 or its cDNA sequence.In yet another aspect, according to the SignalP program of Nucleotide 1 to the 60 coded signal peptide of prediction SEQ ID NO:5 (D72UEK), mature polypeptide encoded sequence is the Nucleotide 61 to 1912 of SEQ ID NO:5 or its cDNA sequence.In yet another aspect, according to the SignalP program of Nucleotide 1 to the 63 coded signal peptide of prediction SEQ ID NO:7 (D72UEJ), mature polypeptide encoded sequence is the Nucleotide 64 to 1626 of SEQ ID NO:7 or its cDNA sequence.
Medium stringent condition: term " medium stringent condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 35% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 55 DEG C, each 15 minutes.
Medium-Gao stringent condition: term " medium-Gao stringent condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 35% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 60 DEG C, each 15 minutes.
Nucleic acid construct: term " nucleic acid construct " means strand or double-stranded nucleic acid molecule, it separates from naturally occurring gene, or it modifiedly contains the section of nucleic acid in the mode that was not originally present in (not otherwise exist) occurring in nature, or it is for what synthesize, it comprises one or more regulating and controlling sequences.
Be operably connected: term " is operably connected " and means such configuration, wherein regulating and controlling sequence be placed in to the appropriate location with respect to the encoding sequence of polynucleotide, make regulating and controlling sequence instruct the expression of encoding sequence.
There is the polypeptide of cellulolytic enhancing activity: term " have cellulose decomposition strengthen polypeptide " means the GH61 polypeptide of the enhancing of enzyme that catalysis has the cellulolytic activity hydrolysis to cellulose materials.For the present invention, by measure free cellulolytic enzyme under the following conditions with contrast the compare reducing sugar increase of hydrolysis fiber cellulosic material or the total amount increase of cellobiose and glucose of hydrolysis and determines cellulolytic enhancing activity: the middle Mierocrystalline cellulose of the pretreated maize straw of 1-50mg total protein/g (PCS), the cellulose decomposition zymoprotein that wherein total protein comprises 50-99.5%w/w, and the protein of the GH61 polypeptide with cellulolytic enhancing activity of 0.5-50%w/w, in suitable temperature, for example 50 DEG C, 55 DEG C or 60 DEG C and pH, for example 5.0 or 5.5 last 1-7 days, contrast hydrolysis is used the total protein heap(ed) capacity of equivalent and cellulose-less decomposes enhanced activity (Mierocrystalline cellulose in 1-50mg cellulose decomposition albumen/g PCS) and carries out.One preferred aspect, use under the cellulase protein heap(ed) capacity existence of the aspergillus oryzae beta-glucosidase enzyme (generations of recombinate in aspergillus oryzae according to WO02/095014) of 2-3% of total protein weight or the Aspergillus fumigatus beta-glucosidase enzyme of the 2-3% of total protein quality (restructuring generation in aspergillus oryzae as described in WO2002/095014) (Novozymes A/S, denmark) mixture is as the source of cellulolytic activity.
The amount that the GH61 polypeptide with cellulolytic enhancing activity reaches the required cellulolytic enzyme of same hydrolysis level by reduction strengthens by the hydrolysis of enzymatic cellulose materials with cellulolytic activity, preferably reduce at least 1.01 times, for example at least 1.05 times, at least 1.10 times, at least 1.25 times, at least 1.5 times, at least 2 times, at least 3 times, at least 4 times, at least 5 times, at least 10 times, or at least 20 times.
Pretreated maize straw: term " PCS " or " pretreated maize straw " mean by with heat and dilute sulphuric acid processing, alkali pre-treatment or the pretreated cellulose materials that is derived from maize straw of neutrality.
Sequence identity: parameter " sequence identity " is described the dependency between two aminoacid sequences or between two nucleotide sequences.
For the present invention, sequence identity degree between two aminoacid sequences is used as EMBOSS software package (EMBOSS:The European Molecular Biology Open Software Suite, Rice etc., 2000, Trends Genet.16:276-277), preferably 3.0.0,5.0.0 version or more performed Needleman-Wunsch algorithm (Needleman and Wunsch in the Needle program of highest version, 1970, J.Mol.Biol.48:443-453) measure.The parameter using is opened point penalty (gap open penalty) 10 for breach, and breach extends point penalty (gap extension penalty) 0.5 and EBLOSUM62 (the EMBOSS version of BLOSUM62) substitution matrix.Use Output rusults (acquisition of use-nobrief option) that Needle is labeled as " the highest identity (longest identity) " as identity per-cent, and be calculated as follows:
(same residue × 100)/(sum of breach in comparison length-comparison)
For the present invention, sequence identity degree between two nucleotide sequences is used as EMBOSS software package (EMBOSS:The European Molecular Biology Open Software Suite, Rice etc., 2000, see above), preferably 5.0.0 version or more performed Needleman-Wunsch algorithm in the Needle program of highest version (Needleman and Wunsch, 1970, see above) measure.The parameter using is opened point penalty 10 for breach, and breach extends point penalty 0.5 and EDNAFULL (the EMBOSS version of NCBI NUC4.4) substitution matrix.Use Output rusults (acquisition of use-nobrief option) that Needle is labeled as " the highest identity " as identity per-cent, and be calculated as follows:
(same deoxyribonucleotide × 100)/(sum of breach in comparison length-comparison)
Subsequence: term " subsequence (subsequence) " for example means, from the polynucleotide of 5 ' and/or 3 ' end disappearance one or more (several) Nucleotide of mature polypeptide encoded sequence; Wherein said subsequence coding has the fragment of xylanase activity.In one aspect, at least 1125 Nucleotide that subsequence contains SEQ ID NO:1, for example at least 1200 Nucleotide, or at least 1275 Nucleotide.In yet another aspect, at least 1155 Nucleotide that subsequence contains SEQ ID NO:3, for example at least 1230 Nucleotide or at least 1305 Nucleotide.In yet another aspect, at least 1305 Nucleotide that subsequence contains SEQ ID NO:5, for example at least 1380 Nucleotide or at least 1455 Nucleotide.In yet another aspect, at least 1200 Nucleotide that subsequence contains SEQ ID NO:7, for example at least 1260 Nucleotide or at least 1320 Nucleotide.
Variant: term " variant " means for example, to comprise change, the polypeptide with xylanase activity that replaces, inserts and/or lack in one or more (several) position.Replace and mean to occupy the different amino acid replacement for amino acid of certain position; Disappearance means to remove the amino acid that occupies certain position; And insert mean in abutting connection with and and then occupy the amino acid of certain position after add amino acid.
Very high stringent condition: term " very high stringent condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 50% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 70 DEG C, each 15 minutes.
Very low stringency condition: term " very low stringency condition " means the probe at least 100 Nucleotide of length, at 42 DEG C, 5X SSPE, 0.3%SDS, 200 micrograms/ml sheared and the methane amide of the salmon sperm DNA of sex change and 25% in, carry out prehybridization and hybridization 12 to 24 hours according to the Southern blotting of standard.Use 2X SSC, 0.2%SDS to wash three times final solid support material at 45 DEG C, each 15 minutes.
Contain xylan material: term " containing xylan material " means to contain β-(1-4) material of the plant cell wall polysaccharides of the xylose residues skeleton of connection any comprising.The xylan of terrestrial plant is the heteropolymer with β-(1-4)-xylopyranose skeleton, and it has short sugar chain branch.They comprise D-glucuronic acid or its 4-O-methyl ether, L-arabinose and/or the multiple oligosaccharides that comprises D-wood sugar, L-arabinose, D-or L-semi-lactosi and D-Glucose.The polysaccharide of xylan type can be divided into equal xylan (homoxylan) and Heteroxylan (heteroxylan), the latter comprises glucuronoxylan, (Arab) glucuronoxylan, (glucuronic acid) araboxylan, araboxylan and compound Heteroxylan.Referring to, such as Ebringerova etc., 2005, Adv.Polym.Sci.186:1-67.
In technique of the present invention, can use any material that contains xylan.One preferred aspect, described containing xylan material be ligno-cellulose.
Xylan degrading activity or xylan degrading activity: term " xylan degrading activity " or " xylan degrading activity " mean the biologic activity of hydrolysis containing xylan material.Two kinds of basic methods of measuring xylan degrading activity comprise: (1) measures total pentosan degrading activity, and (2) measure independent xylan degrading activity (for example endo-xylanase, xylobiase, arabinofuranosidase, alpha-glucuronidase, acetyl xylan esterase, feruloyl esterase and α-glucuronic acid esterase (α-glucuronyl esterase)).The nearest in-progress summary in xylanase clastic enzyme assay method is in several open source literatures, comprise Biely and Puchard, Recent progress in the assays of xylanolytic enzymes, 2006, Journal of the Science of Food and Agriculture86 (11): 1636-1647; Spanikova and Biely, 2006, Glucuronoyl esterase-Novel carbohydrate esterase produced by Schizophyllum commune, FEBS Letters580 (19): 4597-4601; Herrmann, Vrsanska, Jurickova, Hirsch, Biely, and Kubicek, 1997, The beta-D-xylosidase of Trichoderma reesei is a multifunctional beta-D-xylan xylohydrolase, Biochemical Journal321:375-381.
Total pentosan degrading activity can be measured by determining from the reducing sugar of polytype xylan formation, described xylan comprises for example oat wheat (oat spelt), beech wood (beechwood) and Larch (larchwood) xylan, or can determine that the xylan fragment of the dyeing discharging from the xylan of multiple covalency dyeing measures by light-intensity method.The 4-O-methylglucuronic acid xylan of modal total pentosan degrading activity assay method based on from poly produces reducing sugar, as Bailey, Biely, Poutanen, 1992, Interlaboratory testing of methods for assay of xylanase activity, Journal of Biotechnology23 (3): described in 257-270.Xylanase activity also can with 0.2%AZCL-araboxylan as substrate at 37 DEG C 0.01% in (4-(1,1,3,3-tetramethyl butyl) phenyl-polyoxyethylene glycol) and 200mM sodium phosphate buffer pH6, determine.The xylanase activity of a unit is defined as at 37 DEG C, and pH6 produces 1.0 micromole's azurins (azurine) from the 0.2%AZCL-araboxylan per minute as substrate in 200mM sodium phosphate pH6 damping fluid.
For the present invention, xylan degrading activity is birch xylan (the Sigma Chemical Co. being caused under following usual conditions by xylanolytic enzyme by measuring, Inc., St.Louis, MO, USA) increase of hydrolysis is determined: 1ml reaction, 5mg/ml substrate (total solid), 5mg xylan decomposing protein/g substrate, 50mM sodium acetate, pH5, 50 DEG C, 24 hours, as Lever, 1972, A new reaction for colorimetric determination of carbohydrates, described in Anal.Biochem47:273-279, use P-hydroxybenzoic acid hydrazides (PHBAH) assay method to carry out glycan analysis.
Zytase: term " zytase " means Isosorbide-5-Nitrae-β-D-xylan-wood sugar lytic enzyme (Isosorbide-5-Nitrae-β-D-xylan-xylohydrolase) (E.C.3.2.1.8), the interior hydrolysis of Isosorbide-5-Nitrae-β-D-wood sugar glycosidic bond in its catalysis xylan.For the present invention, xylanase activity can use 0.2%AZCL-araboxylan as substrate at 37 DEG C, pH6 is 0.01% with in 200mM sodium acetate buffer or 0.2%AZCL-xylan as substrate at 50 DEG C, pH5.0 is 0.01% determine with (referring to embodiment 16) in 20mM sodium acetate buffer.The xylanase activity of a unit is defined as at 37 DEG C, pH6 produces 1.0 micromole's azurins or at 50 DEG C, pH5 is at 20mM sodium acetate buffer pH5.0 and 0.01% from the 0.2%AZCL-araboxylan per minute as substrate in 200mM sodium phosphate pH6 damping fluid in produce 1.0 micromole's azurins from the 0.2%AZCL-xylan per minute as substrate.Or xylanase activity can use wheat araboxylan containing 0.01% as substrate at 50 DEG C according to embodiment 16 50mM sodium acetate pH5.0 in determine.
In one aspect, polypeptide of the present invention has SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the xylanase activity of the mature polypeptide of SEQ ID NO:8 at least 20%, for example at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, or at least 100%.
Detailed Description Of The Invention
There is the polypeptide of xylanase activity
In one embodiment, the present invention relates to isolated polypeptide, itself and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity, described polypeptide has xylanase activity.In one aspect, described polypeptide and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 differs nearly 10 amino acid, for example 1,2,3,4,5,6,7,8,9 or 10 amino acid.
Polypeptide of the present invention preferably comprises or consists of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the aminoacid sequence of SEQ ID NO:8 or its allelic variant; Or there is the fragment of xylanase activity for it.In yet another aspect, described polypeptide comprises or consists of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8.In yet another aspect, described polypeptide comprises or consists of the amino acid 21 to 529 of amino acid/11 7 to 477, the SEQ ID NO:6 of amino acid/11 9 to 475, the SEQ ID NO:4 of SEQ ID NO:2, or the amino acid 22 to 480 of SEQ ID NO:8.
In another embodiment, the present invention relates to have the isolated polypeptide of xylanase activity, it is by polynucleotide encoding, described polynucleotide are at unusual low stringency condition, low stringency condition, medium stringent condition, medium-Gao stringent condition, high stringent condition, or hybridize with following under very high stringent condition: (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (ii) SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, or (iii) (i) or total length complement (Sambrook etc. (ii), 1989, Molecular Cloning, A Laboratory Manual, the 2nd edition, Cold Spring Harbor, New York).
Can utilize SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the polynucleotide of SEQ ID NO:7 or its subsequence, and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the polypeptide of SEQ ID NO:8 or its mature polypeptide, or its fragment designing nucleic acid probe, has the DNA of the polypeptide of xylanase activity with the identification of strains that never belongs to together or plant according to method well known in the art and clones coding.Particularly, according to the Southern trace method of standard, can by these probes for the genomic dna of interested cell or cDNA hybridization, with identify with from wherein separating corresponding gene.These probes can be significantly shorter than complete sequence, but should be at least 15 in length, for example at least 25, at least 35, or at least 70 Nucleotide.Preferably, described nucleic acid probe is the length of at least 100 Nucleotide, for example, at least 200 Nucleotide, at least 300 Nucleotide, at least 400 Nucleotide, at least 500 Nucleotide, at least 600 Nucleotide, at least 700 Nucleotide, at least 800 Nucleotide, or the length of at least 900 Nucleotide.The two all can use DNA and rna probe.Conventionally probe mark (for example, is used to survey corresponding gene 32p, 3h, 35s, vitamin H or avidin (avidin) mark).These probes are covered by the present invention.
Can be from the genomic dna prepared by other such bacterial strain or cDNA library screening and above-mentioned probe hybridization and coding there is the DNA of the polypeptide of xylanase activity.Can pass through agarose or polyacrylamide gel electrophoresis, or separate genome or other DNA from these other bacterial strains by other isolation technique.The DNA of the DNA from library or separation can be transferred to soluble cotton (nitrocellulose) or other suitable solid support material and be fixed thereon.In order to identify the NO:1 with SEQ ID, SEQ ID NO:3, SEQ ID NO:5, or SEQ ID NO:7, its mature polypeptide encoded sequence, or clone or the DNA of its subsequence hybridization, be used in described solid support material in Sounthern trace.
For the present invention, hybridization represents that polynucleotide are being low to moderate under very high stringent condition and the nucleic acid probe hybridization of mark very much, described nucleic acid probe is corresponding to (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or SEQ ID NO:7, (ii) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (iii) SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, (iv) their total length complement, or (v) their subsequence.Can use for example X-ray film (X-ray film) or other any detection meanss as known in the art to detect under these conditions and the molecule of nucleic acid probe hybridization.
In one aspect, described nucleic acid probe is coding SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the polypeptide of SEQ ID NO:8 or its mature polypeptide, or the polynucleotide of their fragment.In yet another aspect, described nucleic acid probe is SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or SEQ ID NO:7; Its mature polypeptide encoded sequence; Or SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7; Or its mature polypeptide encoded sequence.
In another embodiment, the present invention relates to have the isolated polypeptide of xylanase activity, it is by polynucleotide encoding, described polynucleotide and SEQ ID NO:1, SEQ ID NO:3 or its cDNA sequence, SEQ ID NO:5 or its cDNA sequence, or the mature polypeptide encoded sequence of SEQ ID NO:7 or its cDNA sequence has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity, described polypeptide has xylanase activity.
In another embodiment, the present invention relates to SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 for example, comprises the variant of replacement, disappearance and/or insertion in one or more (several) position.In one embodiment, import SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the quantity of aminoacid replacement, disappearance and/or the insertion of the mature polypeptide of SEQ ID NO:8 is 10 at the most, for example 1,2,3,4,5,6,7,8,9 or 10.Amino acid change can be less important property, i.e. conservative aminoacid replacement or insertion, its not remarkably influenced protein folding and/or active; Be generally 1-30 amino acid whose little disappearance; Little amino or C-terminal extend, for example N-terminal methionine residues; The little joint peptide of about 20-25 residue at the most; Or promote the little extension of purifying by changing net charge or other function, as polyhistidine sequence (poly histidine tract), epitope (antigenic epitope) or in conjunction with territory (binding domain).
The conservative example replacing is within following group: basic aminoacids group (arginine, Methionin and Histidine), acidic amino acid group (L-glutamic acid and aspartic acid), polare Aminosaeren group (glutamine and l-asparagine), hydrophobic amino acid group (leucine, Isoleucine and α-amino-isovaleric acid), aromatic amino acid group (phenylalanine, tryptophane and tyrosine) and p1 amino acid group (glycine, L-Ala, Serine, Threonine and methionine(Met)).Conventionally the aminoacid replacement that does not change specific activity (specific activity) is known in the art, and by for example H.Neurath and R.L.Hill, 1979, in The Proteins, Academic Press, describes in New York.The exchange the most generally occurring is Ala/Ser, Val/Ile, Asp/Glu, Thr/Ser, Ala/Gly, Ala/Thr, Ser/Asn, Ala/Val, Ser/Gly, Tyr/Phe, Ala/Pro, Lys/Arg, Asp/Asn, Leu/Ile, Leu/Val, Ala/Glu and Asp/Gly.
Or amino acid change has the character that the physics-chem characteristic of polypeptide is changed.For example, amino acid change can improve the thermostability of polypeptide, changes substrate specificity, changes optimal pH etc.
Can be according to methods known in the art, for example site-directed mutagenesis or L-Ala subregion mutagenesis (Cunningham and Wells, 1989, Science244:1081-1085) are identified the indispensable amino acid in parent's polypeptide.In a rear technology, single alanine mutation is incorporated into the each residue in molecule, and tests the xylanase activity of the mutating molecule obtaining, to identify the amino-acid residue for the activity key of described molecule.Separately referring to Hilton etc., 1996, J.Biol.Chem.271:4699-4708.The reactive site of enzyme or other biological interaction also can pass through the physical analysis to structure, determine in conjunction with the amino acid whose sudden change in contact site of inferring, structure is measured by following these technology: as nucleus magnetic resonance, crystallography, electron diffraction or photoaffinity labeling.Referring to such as de Vos etc., 1992, Science255:306-312; Smith etc., 1992, J.Mol.Biol.224:899-904; Wlodaver etc., 1992, FEBS Lett.309:59-64.Also can be from inferring the identity of indispensable amino acid with the identity analysis of related polypeptide.
Can use known mutagenesis, restructuring and/or Shuffling Method, then carry out relevant screening process, as by Reidhaar-Olson and Sauer, 1988, Science241:53-57; Bowie and Sauer, 1989, Proc.Natl.Acad.Sci.USA86:2152-2156; WO95/17413; Or WO95/22625 disclosed those, carry out one or more aminoacid replacement, disappearance and/or insert and tested.Other spendable methods comprise fallibility PCR, phage display (such as Lowman etc., 1991, Biochemistry30:10832-10837; U.S. Patent number 5,223,409; And region directed mutagenesis (region-directed mutagenesis) (Derbyshire etc., 1986, Gene46:145 WO92/06204); Deng, 1988, DNA7:127).
Mutagenesis/Shuffling Method can combine to detect the activity (Ness etc., 1999, Nature Biotechnology17:893-896) by the polypeptide through clone, mutagenesis of host cell expression with high-throughput, auto-screening method.The DNA molecular through mutagenesis of coding active polypeptide can reclaim and use this area standard method to check order rapidly from host cell.These methods allow to determine fast the importance of single amino acids residue in polypeptide.
Described polypeptide can be hybrid polypeptide, and the region of one of them polypeptide is blended in N end or the C end in the region of another polypeptide.
Described polypeptide can be the fusion polypeptide that fusion polypeptide maybe can be cut, and wherein another polypeptide is blended in N end or the C end of polypeptide of the present invention.By being blended in to polynucleotide of the present invention, the polynucleotide of another polypeptide of coding produce fusion polypeptide.It is known in the art producing the technology of fusion polypeptide, and comprises and connect the encoding sequence of coded polypeptide so that they meet frame (in frame), and makes the expression of fusion polypeptide under the control of identical promoters and terminator.Fusion rotein also can use interior albumen (intein) technique construction, wherein fusions after translation, produce (Cooper etc., 1993, EMBO J.12:2575-2583; Dawson etc., 1994, Science266:776-779).
Fusion polypeptide can also comprise cleavage site between two polypeptide.In the time of secretion fusion polypeptide, described site is just cut open, and discharges described two polypeptide.The example that cuts site includes, but not limited to be disclosed in Martin etc., 2003, J.Ind.Microbiol.Biotechnol.3:568-76; Svetina etc., 2000, J.Biotechnol.76:245-251; Rasmussen-Wilson etc., 1997, Appl.Environ.Microbiol.63:3488-3493; Ward etc., 1995, Biotechnology13:498-503; With Contreras etc., 1991, Biotechnology9:378-381; Eaton etc., 1986, Biochem.25:505-512); Collins-Racie etc., 1995, Biotechnology13:982-987; Carter etc., 1989, Proteins:Structure, Function, and Genetics6:240-248; And Stevens, the site in 2003, Drug Discovery World4:35-48.
There is the source of the polypeptide of xylanase activity
The polypeptide with xylanase activity of the present invention can obtain the microorganism from any genus.For the present invention, for relevant with given source herein term " obtain from ", the meaning should be by the polypeptide of polynucleotide encoding and is produced by described source, or is produced by the bacterial strain wherein having inserted from the polynucleotide in described source.In one aspect, the polypeptide obtaining from given source is exocytosis.
In one aspect, described polypeptide is that capital spore belongs to (Scytalidium) polypeptide.In yet another aspect, described polypeptide is thermophilic capital spore (Scytalidium thermophilum) polypeptide.In yet another aspect, described polypeptide is Penicillium (Penicillium) polypeptide.In yet another aspect, described polypeptide is Ai Mosen mould (Penicillium emersonii) polypeptide.In yet another aspect, described polypeptide is penicillium oxalicum (Penicillium oxalicum) polypeptide.
Will be understood that for aforesaid kind, the present invention comprises completely and the imperfect state (perfect and imperfect states), with other taxonomic equivalent (equivalent), for example anamorph (anamorph), and their known kind names no matter.Those skilled in the art will easily identify the identity of applicable equivalent.
The bacterial strain of these kinds can easily be obtained for the public at many culture collections center, described preservation center such as American type culture collection (the American Type Culture Collection) (ATCC), Germany microorganism and cell culture preservation center (Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH) are (DSMZ), fungi strain preservation center (Centraalbureau Voor Schimmelcultures) (CBS) and research centre, North, agricultural research institute's patent culture collection center (Agricultural Research Service Patent Culture Collection, Northern Regional Research Center) (NRRL).
Can utilize above-mentioned probe to originate from other, from nature (for example comprise, soil, compost, water etc.) microorganism that separates or directly acquisition for example, from the DNA sample of nature material (, soil, compost, water etc.), identify and obtain described polypeptide.Be used for is directly well known in the art from the technology of Natural habitat (habitat) separate microorganism and DNA.Can obtain by screening similarly the genomic dna of another kind of microorganism or the DNA sample of cDNA library or mixing subsequently the polynucleotide of coding said polypeptide.Once by probe in detecting to the polynucleotide of coded polypeptide, just can use technology known to persons of ordinary skill in the art described polynucleotide are separated or are cloned (referring to, for example, Sambrook etc., 1989, see above).
Catalytic domain
In one embodiment, the present invention also relates to catalytic domain, and the amino acid 21 to 366 of itself and SEQ ID NO:6 has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.In one aspect, described catalytic domain comprises aminoacid sequence, and the amino acid 21 to 366 of described aminoacid sequence and SEQ ID NO:6 differs the most nearly 10, for example, and 1,2,3,4,5,6,7,8,9 or 10 amino acid.
Described catalytic domain preferably comprises or consists of the amino acid 21 to 366 of SEQ ID NO:6; Or its allelic variant, or there is the fragment of cellulolytic enhancing activity for it.
In another embodiment, the present invention also relates to catalytic domain, it is by polynucleotide encoding, and described polynucleotide are at unusual low stringency condition, low stringency condition, medium stringent condition, medium-Gao stringent condition, high stringent condition, or lower Nucleotide 61 to 1423 or its total length complement (Sambrook etc. with SEQ ID NO:5 of very high stringent condition (as definition above), 1989, see above) hybridization.
In another embodiment, the present invention also relates to catalytic domain, it is by polynucleotide encoding, the Nucleotide 61 to 1423 of described polynucleotide and SEQ ID NO:5 has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.
In another embodiment, the amino acid 21 to 366 that the present invention also relates to SEQ ID NO:6 for example, comprises replacement, disappearance and/or inserts catalytic domain variant in one or more (several) position.In one aspect, introduce aminoacid replacement, the disappearance of the sequence of the amino acid 21 to 366 of SEQ ID NO:6 and/or insert number for reaching 10 most, for example 1,2,3,4,5,6,7,8,9 or 10.
In conjunction with territory
In one embodiment, the present invention also relates to sugar in conjunction with territory, and the amino acid 494 to 529 of itself and SEQ ID NO:6 has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.In one aspect, described sugar comprises aminoacid sequence in conjunction with territory, and the amino acid 494 to 529 of described aminoacid sequence and SEQ ID NO:6 differs the most nearly 10, for example, and 1,2,3,4,5,6,7,8,9 or 10 amino acid.
Described cellulose binding domain preferably comprises or consists of the amino acid 494 to 529 of SEQ ID NO:6; Or its allelic variant, or there is sugar in conjunction with active fragment for it.
In another embodiment, the present invention also relates to sugar in conjunction with territory, it is by polynucleotide encoding, and described polynucleotide are at unusual low stringency condition, low stringency condition, medium stringent condition, medium-Gao stringent condition, high stringent condition, or lower Nucleotide 1805 to 1912 or its total length complement (Sambrook etc. with SEQ ID NO:5 of very high stringent condition (as definition above), 1989, see above) hybridization.
In another embodiment, the present invention also relates to sugar in conjunction with territory, it is by polynucleotide encoding, the Nucleotide 1805 to 1912 of described polynucleotide and SEQ ID NO:5 has at least 60%, for example at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.
In another embodiment, the amino acid 494 to 529 that the present invention also relates to SEQ ID NO:6 for example, comprise replacement, disappearance in one or more (several) position and/or the sugar that inserts in conjunction with territory variant.In one aspect, introduce aminoacid replacement, the disappearance of the sequence of the amino acid 494 to 529 of SEQ ID NO:6 and/or insert number for nearly 10, for example 1,2,3,4,5,6,7,8,9 or 10.
The catalytic domain being operatively connected can be from lytic enzyme in conjunction with territory with sugar, isomerase, ligase enzyme, lyase, oxygen is enzyme or transferring enzyme also, for example aminopeptidase, amylase, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, at, Maltose 4-glucosyltransferase, deoxyribonuclease, endoglucanase, esterase, alpha-galactosidase, beta-galactosidase enzymes, glucoamylase, alpha-glucosidase, beta-glucosidase enzyme, saccharase, laccase, lipase, mannosidase, become glycanase, oxydase, pectin decomposing enzyme, peroxidase, phytase, polyphenoloxidase, proteolytic ferment, rnase, trans-glutaminases, zytase or xylobiase.The polypeptide of coding catalytic domain can obtain from any protokaryon, eucaryon or other source.
Polynucleotide
The present invention also relates to coding polypeptide of the present invention as described herein, catalytic domain, or sugar is in conjunction with the polynucleotide of the separation in territory.
For separating of or the technology of clone's polynucleotide be well known in the art, and comprise from genomic dna or cDNA, or its combination separates.Can be by for example using the polymerase chain reaction (PCR) known or the antibody screening of expression library to detect the cloned DNA fragment with apokoinou construction characteristic, thus realize from this genomic dna cloning polynucleotide.Referring to, for example, Innis etc., 1990, PCR:A Guide to Methods and Application, Academic Press, New York.Can use other nucleic acid amplification method, as (ligated activated transcription is transcribed in ligase chain reaction (LCR) (LCR), connection activation; LAT) amplification (NASBA) with based on polynucleotide.The bacterial strain that can belong to from Penicillium or capital spore, or related organisms clones described polynucleotide, therefore, for example can be described polynucleotide polypeptid coding area allele variant or plant between variant (species variant).
The polynucleotide of modifying code book invention polypeptide may be essential for similar polypeptide for synthetic and described polypeptide substantially.Term refers to described polypeptide " substantially similar " form that the non-natural of polypeptide exists.These polypeptide may be different from from its natural origin isolated polypeptide in some engineered modes, for example, and the different variants in aspect such as specific activity, thermostability, optimal pH.Can be as SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, or SEQ ID NO:3, SEQ ID NO:5, or on the basis of the polynucleotide that present of the cDNA sequence of the mature polypeptide encoded sequence of SEQ ID NO:7 and/or replace to build variant by introducing following Nucleotide: described replacement does not cause the change of polypeptid acid sequence, but meets the codon usage that is intended to the host organisms that produces enzyme; Or described replacement can produce different aminoacid sequences.The general introduction replacing about Nucleotide, referring to, for example, Ford etc., 1991, Protein Expression and Purification2:95-107.
Nucleic acid construct
The invention still further relates to the nucleic acid construct that comprises polynucleotide of the present invention, described polynucleotide are operably connected with one or more regulating and controlling sequences, and described regulating and controlling sequence instructs the expression of encoding sequence in suitable host cell under the condition compatible with this regulating and controlling sequence.
Can be with being permitted described in multi-mode operation polynucleotide so that the expression of polypeptide.Depend on expression vector, it may be desirable or essential operating on it before by polynucleotide insertion vector.The technology that uses recombinant DNA method to modify polynucleotide is well known in the art.
Regulating and controlling sequence can be promotor, the polynucleotide that it is identified by the host cell of the polynucleotide for expressing coding polypeptide of the present invention.The transcription regulating nucleotide sequence that promotor contains the expression that mediates polypeptide.Promotor can be any polynucleotide that show transcriptional activity in host cell, comprises sudden change, brachymemma and promotor heterozygosis, and can from the born of the same parents of coding and host cell homology or allos or in born of the same parents, obtain by the gene of polypeptide.
It is the promotor obtaining from following for instructing the example of the suitable promotor that nucleic acid construct of the present invention transcribes at bacterial host cell: bacillus amyloliquefaciens alpha-amylase gene (amyQ), bacillus licheniformis alpha-amylase gene (amyL), Bacillus licheniformis penicillinase gene (penP), bacstearothermophilus produces malt amylase gene (amyM), subtilis type froctosan saccharase gene (sacB), subtilis xylA and xylB gene, bacillus thuringiensis cryIIIA gene (Agaisse and Lereclus, 1994, Molecular Microbiology13:97-107), intestinal bacteria lac operon, intestinal bacteria trc promotor (Egon etc., 1988, Gene69:301-315), sky blue streptomycete gelase gene (dagA) and protokaryon β-lactamase gene (Villa-Kamaroff etc., 1978, Proceedings of the National Academy of Sciences USA75:3727-3731), and tac promotor (DeBoer etc., 1983, Proc.Natl.Acad.Sci.USA80:21-25).Other promotor is at " Useful proteins from recombinant bacteria " in Gilbert etc., and 1980, Scientific American, in 242:74-94; With at Sambrook etc., 1989, middle description sees above.The example of Gene expression is disclosed in WO99/43835.
It is the promotor obtaining from the gene of following enzyme at the example of the suitable promotor of filamentous fungal host cell transcription for instructing nucleic acid construct of the present invention: Aspergillus nidulans acetamidase, aspergillus niger neutral alpha-amylase, aspergillus niger acid acceptance α-amylase, aspergillus niger or Aspergillus awamori glucoamylase (glaA), aspergillus oryzae TAKA amylase, aspergillus oryzae Sumizyme MP, aspergillus oryzae triose-phosphate isomerase, point sickle spore trypsin-like proteolytic enzyme (WO96/00787), empiecement sickle spore amyloglucosidase (WO00/56900), empiecement sickle spore Daria (WO00/56900), empiecement sickle spore Quinn (WO00/56900), Man Hegen Mucor (Rhizomucor miehei) lipase, Man Hegen Mucor aspartate protease, Trichodermareesei beta-glucosidase enzyme, Trichodermareesei cellobiohydrolase I, Trichodermareesei cellobiohydrolase II, trichoderma reesei endoglucanase I, trichoderma reesei endoglucanase II, trichoderma reesei endoglucanase III, trichoderma reesei endoglucanase V, Xylanase from Trichoderma reesei I, Xylanase from Trichoderma reesei II, Xylanase from Trichoderma reesei III, Trichodermareesei xylobiase, Trichodermareesei translation elongation factor, and NA2-tpi promotor (a kind of promotor of modification, it carrys out comfortable Aspergillus neutral alpha-amylase gene, and wherein untranslated leader sequence is substituted by the untranslated leader sequence of the gene of Aspergillus triose-phosphate isomerase, limiting examples comprises the promotor of modification, and it is from the gene of aspergillus niger neutral alpha-amylase, and wherein untranslated leader sequence is substituted by the untranslated leader sequence of the gene of Aspergillus nidulans or aspergillus oryzae triose-phosphate isomerase), with their sudden change, brachymemma and promotor heterozygosis.Other promotor is described in U.S. Patent number 6,011,147.
In yeast host, useful promotor obtains from following gene: yeast saccharomyces cerevisiae Hydratase, phosphoenolpyruvate (ENO-1), yeast saccharomyces cerevisiae galactokinase (GAL1), yeast saccharomyces cerevisiae alcoholdehydrogenase/glyceraldehyde-3-phosphate dehydrogenase (ADH1, ADH2/GAP), yeast saccharomyces cerevisiae triose-phosphate isomerase (TPI), brewing yeast metallothionein (CUP1) and yeast saccharomyces cerevisiae glycerol 3-phosphate acid kinase.For other useful promotor of yeast host cell, by Romanos etc., 1992, Yeast8:423-488 describes.
Regulating and controlling sequence can be also transcription terminator, and it is identified to stop transcribing by host cell.Described terminator is operably connected with 3 ' end of the polynucleotide of coding said polypeptide.In the present invention, can use any terminator that has function in host cell.
Obtain from following gene for the preferred terminator of bacterial host cell: Bacillus clausii Sumizyme MP (aprH), bacillus licheniformis alpha-amylase (amyL) and intestinal bacteria ribosome-RNA(rRNA) (rrnB).
Obtain from the gene of following enzyme for the preferred terminator of filamentous fungal host cell: Aspergillus nidulans acetamidase, Aspergillus nidulans o-amino benzoyl acid synthase, aspergillus niger glucoamylase, aspergillus niger alpha-glucosidase, aspergillus oryzae TAKA amylase, point sickle spore trypsin-like proteolytic enzyme, Trichodermareesei beta-glucosidase enzyme, Trichodermareesei cellobiohydrolase I, Trichodermareesei cellobiohydrolase II, trichoderma reesei endoglucanase I, trichoderma reesei endoglucanase II, trichoderma reesei endoglucanase III, trichoderma reesei endoglucanase V, Xylanase from Trichoderma reesei I, Xylanase from Trichoderma reesei II, Xylanase from Trichoderma reesei III, Trichodermareesei xylobiase and Trichodermareesei translation elongation factor.
Obtain from the gene of following enzyme for the preferred terminator of yeast host cell: yeast saccharomyces cerevisiae Hydratase, phosphoenolpyruvate, brewing yeast cell pigment C (CYC1) and yeast saccharomyces cerevisiae glyceraldehyde-3-phosphate dehydrogenase.For other useful terminator of yeast host cell by Romanos etc., 1992, description sees above.
Regulating and controlling sequence can also be the mRNA stabilization district of the encoding sequence upstream of promotor downstream and gene, and it increases the expression of described gene.
The example in suitable mRNA stabilization district obtains from following gene: bacillus thuringiensis cryIIIA gene (WO94/25612) and subtilis SP82 gene (Hue etc., 1995, Journal of Bacteriology177:3465-3471).
Regulating and controlling sequence also can be leader sequence, and it is the mRNA non-translational region important for the translation of host cell.Leader sequence is operably connected to 5 '-end of the polynucleotide of coded polypeptide.Can use any leader sequence that has function in host cell.
Obtain from the gene of following enzyme for the preferred leader sequence of filamentous fungal host cell: aspergillus oryzae TAKA amylase and Aspergillus nidulans triose-phosphate isomerase.
The leader sequence suitable for yeast host cell obtains from the gene of following enzyme: yeast saccharomyces cerevisiae Hydratase, phosphoenolpyruvate (ENO-1), yeast saccharomyces cerevisiae glycerol 3-phosphate acid kinase, yeast saccharomyces cerevisiae alpha factor and yeast saccharomyces cerevisiae alcoholdehydrogenase/glyceraldehyde-3-phosphate dehydrogenase (ADH2/GAP).
Regulating and controlling sequence also can be polyadenylation sequence, and it is the sequence being operably connected with 3 ' end of polynucleotide, and in the time transcribing, host cell is identified as the signal that poly-adenosine residue is added into the mRNA transcribing.Can use any polyadenylation sequence that has function in host cell.
Obtain from the gene of following enzyme for the preferred polyadenylation sequence of filamentous fungal host cell: Aspergillus nidulans o-amino benzoyl acid synthase, aspergillus niger glucoamylase, aspergillus niger alpha-glucosidase, aspergillus oryzae TAKA amylase and sharp sickle spore trypsin-like proteolytic enzyme.
For the useful polyadenylation sequence of yeast host cell, by Guo and Sherman, 1995, Mol.Cellular Biol.15:5983-5990 describes.
Regulating and controlling sequence can also be signal peptide coding region, and its coding holds with the N of polypeptide the signal peptide being connected, and and guides described polypeptide to enter emiocytosis approach.Encoding sequence 5 ' the end of polynucleotide can comprise signal coding sequence inherently, and it is connected in translation reading frame natively with together with the section of the encoding sequence of coding said polypeptide.Or encoding sequence 5 ' end can contain the signal coding sequence for described encoding sequence external source.When encoding sequence is natural while not containing signal coding sequence, external source signal coding sequence may be essential.Or, can directly replace natural signals peptide-coding sequence to strengthen the secretion of polypeptide with external source signal coding sequence.But the polypeptide of can instruction expressing enters any signal coding sequence of the Secretory Pathway of host cell.
The signal coding sequence obtaining from the gene of following enzyme for the effective signal coding sequence of bacterial host cell: bacillus NCIB11837 produces maltogenic amylase, Bacillus licheniformis subtilisin (subtilisin), Bacillus licheniformis β-lactamase, bacillus stearothermophilus alpha-amylase, bacstearothermophilus neutral protease (nprT, nprS, nprM) and subtilis prsA.Other signal peptide is by Simonen and Palva, and 1993, Microbiological Reviews57:109-137 describes.
The signal coding sequence obtaining from the gene of following enzyme for the effective signal coding sequence of filamentous fungal host cell: aspergillus niger neutral starch enzyme, aspergillus niger glucoamylase, aspergillus oryzae TAKA amylase, Humicola insolens cellulase, Humicola insolens EGV, thin cotton shape humicola lanuginosa lipase and Man Hegen Mucor aspartate protease.
The signal peptide useful for yeast host cell obtains from the gene of yeast saccharomyces cerevisiae alpha factor and yeast saccharomyces cerevisiae saccharase.Other useful signal coding sequence is by Romanos etc., and 1992, description sees above.
Regulating and controlling sequence can also be propeptide code sequence, and its coding is positioned at the propetide of polypeptide N end.Gained polypeptide is called proenzyme (proenzyme) or front polypeptide (propolypeptide) (or being called in some cases proenzyme (zymogen)).Normally non-activity of front polypeptide, and can by the catalysis of propetide or autocatalysis cutting in the past polypeptide be converted into active polypeptide.Can obtain propeptide code sequence from the gene of bacillus subtilis alkali proteinase (aprE), subtilis neutral protease (nprT), thermophilic fungus destroyed wire laccase (WO95/33836), Man Hegen Mucor aspartate protease and yeast saccharomyces cerevisiae alpha factor.
When the two all exists when signal peptide and propeptide sequence, and then propeptide sequence is placed in to the N end of (next to) polypeptide, and signal peptide sequence is placed in to the and then N end of propeptide sequence.
It is desirable to equally add regulating sequence, its growth with respect to host cell regulates the expression of polypeptide.The example that regulates sequence is to cause genetic expression response chemistry or physical stimulation thing, comprises those systems that regulate the existence of compound and open or close.Adjusting sequence in prokaryotic system comprises lac, tac and trp operator gene system.In yeast, can use ADH2 system or GAL1 system.In filamentous fungus, can use aspergillus niger glucoamylase promotor, aspergillus oryzae TAKA α-amylase promotor and aspergillus oryzae glucoamylase promotor, Trichodermareesei cellobiohydrolase I promotor and Trichodermareesei cellobiohydrolase II promotor.Other example that regulates sequence is those sequences that allow gene amplification.In eukaryotic system, these regulate sequence to be included in methotrexate (methotrexate) and have the lower dihydrofolate reductase gene increasing, and the metallothionein gene increasing with heavy metal (with heavy metal).In these cases, the polynucleotide of coded polypeptide will be operably connected with regulating sequence.
Expression vector
The invention still further relates to recombinant expression vector, described recombinant expression vector comprises polynucleotide of the present invention, promotor and transcribes and translation termination signal.Multiple Nucleotide and regulating and controlling sequence can combine to produce recombinant expression vector, and described expression vector can comprise that one or more restriction sites are easily to allow to insert or replace in these sites the polynucleotide of coded polypeptide.Or, can express described polynucleotide by inserting at the suitable carrier for expressing the nucleic acid construct or the polynucleotide that comprise described polynucleotide.In the process of preparing expression vector, encoding sequence is placed in to carrier, thereby this encoding sequence is operably connected for expression with suitable regulating and controlling sequence.
Recombinant expression vector can be anyly can carry out easily recombinant DNA step, and can produce the carrier (for example, plasmid or virus) of the expression of polynucleotide.The selection of carrier will conventionally depend on carrier and will introduce the consistency of host cell of this carrier.Carrier can be wire or closed hoop plasmid.
Carrier can be autonomously replicationg vector, that is, the carrier existing as the outer entity (entity) of karyomit(e), it copies and is independent of chromosome duplication, for example, plasmid, extra-chromosomal element, minichromosome (minichromosome) or artificial chromosome.Carrier can contain any for guaranteeing the means (means) of self-replacation.Or carrier can be a kind of in the time being introduced in host cell, is incorporated into the carrier copying in genome and together with having integrated the karyomit(e) of this carrier.In addition, can use independent carrier or plasmid or two or more carriers or plasmid, the global DNA (total DNA) that it contains host cell gene group to be introduced jointly, maybe can use transposon (transposon).
Described carrier preferably contains one or more selected markers, so that easily select the cell through conversion, transfection, transduction etc.Selected marker is such gene, and its product provides biocide or virus resistance, resistance to heavy metal, to auxotrophic prototrophy (prototrophy to auxotrophs) etc.
The example of selective bacterium mark is Bacillus licheniformis or subtilis dal gene, or gives the mark of antibiotics resistance, and described antibiotics resistance is penbritin, paraxin, kantlex, Liu Suanyan NEOMYCIN SULPHATE, spectinomycin or tetracyclin resistance for example.Include but not limited to ADE2, HIS3, LEU2, LYS2, MET3, TRP1 and URA3 for the suitable mark of yeast host cell.Selected marker for filamentous fungal host cell includes but not limited to adeA (ribose phosphoric acid aminooimidazole amber carboxylic acid amides synthase, phosphoribosylaminoimidazole-succinocarboxamide synthase), adeB (ribose phosphoric acid aminooimidazole synthase, phosphoribosyl-aminoimidazole synthase), amdS (acetamidase), argB (ornithine transcarbamylase), bar (careless ammonium phosphine (phosphinothricin) Transacetylase), hph (hygromix phosphotransferase), niaD (nitrate reductase) (nitrate reductase), pyrG (Orotidine-5 '-'-phosphate decarboxylase) (orotidine-5 '-phosphate decarboxylase), sC (sulfate adenylyl transferase) and trpC (o-amino benzoyl acid synthase (anthranilate synthase)) and their equivalent.Preferably be used in Aspergillus cell is Aspergillus nidulans or aspergillus oryzae amdS and pyrG gene and streptomyces hygroscopicus (Streptomyces hygroscopicus) bar gene.What be preferred for Trichoderma cell is adeA, adeB, amdS, hph and pyrG gene.
Selected marker can be the double selection Mk system described in WO2010/039889.In one aspect, described double selection mark is hph-tk double selection Mk system.
Described carrier preferably contains the element that allows carrier to be integrated into host cell gene group or carrier to be independent of genomic self-replicating in cell.
In order to be integrated into host cell gene group, the sequence of the polynucleotide of the responsible coded polypeptide of carrier or for enter genomic any other carrier element by homology or non-homogeneous recombination and integration.Or carrier can contain the extra polynucleotide that are used in reference to conducting and cross homologous recombination and be integrated into the exact position in host cell gene group chromosome.The possibility of integrating in order to be increased in exact position, what integrated element should contain sufficient amount has the nucleic acid of height sequence identity with corresponding target sequence, as 100 to 10,000 base pair, 400 to 10,000 base pairs, with 800 to 10,000 base pairs, to improve the probability of homologous recombination.Integrated element can be the sequence of the target sequence homology in any and host cell gene group.In addition, integrated element can be the polynucleotide of non-coding or coding.On the other hand, carrier can be passed through to non-homogeneous recombination and integration in the genome of host cell.
For self-replicating, carrier can also comprise replication orgin, and it can independently copy carrier in described host cell.Replication orgin can be any plasmid replicon (replicator) of bringing into play the mediation self-replicating of function in cell.Term " replication orgin " or " plasmid replicon " mean to make the polynucleotide that copy in plasmid or carrier body.
The example of bacterium replication orgin is the replication orgin that allows plasmid pBR322, the pUC19, pACYC177 and the pACYC184 that copy in intestinal bacteria, and allows the replication orgin of plasmid pUB110, the pE194, pTA1060 and the pAM β 1 that copy in bacillus.
The example that is used for the replication orgin of yeast host cell is 2 microns of replication orgin, ARS1, ARS4, the combination of ARS1 and CEN3, and the combination of ARS4 and CEN6.
In filamentous fungal cells, the example of useful replication orgin is AMA1 and ANS1 (Gems etc., 1991, Gene98:61-67; Cullen etc., 1987, Nucleic Acids Res.15:9163-9175; WO00/24883).Plasmid or carrier that separation of AM A1 gene and structure comprise this gene can complete according to the method being disclosed in WO00/24883.
Can be by the polynucleotide Insertion Into Host Cell of the present invention of more than one copy to increase the generation of polypeptide.The increase of polynucleotide copies number can obtain by the following method: the sequence of at least one additional copy is integrated into host cell gene group, or the selected marker that can increase is included in polynucleotide, under wherein can existing by the selective agent suitable (selectable agent), culturing cell is selected the amplification copy that contains selected marker, and contains thus the cell of the additional copy of polynucleotide.
For connect said elements with build the method for recombinant expression vector of the present invention be well known to those skilled in the art (referring to, for example, Sambrook etc., 1989, see above).
Host cell
The invention still further relates to recombinant host cell, it comprises polynucleotide of the present invention and is operably connected to the regulating and controlling sequence of one or more generations of instructing polypeptide of the present invention.The construct that comprises polynucleotide or carrier are introduced to host cell, described construct or carrier are maintained as chromosomal integration body or as the outer carrier of karyomit(e) of self-replacation as previously mentioned.It is any because the sudden change occurring in reproduction process is different from the offspring of parental cell that term " host cell " comprises parental cell.The selection of host cell will depend on gene and the source thereof of coded polypeptide to a great extent.
Host cell can be useful any cell in the restructuring of polypeptide of the present invention produces, for example, and protokaryon or eukaryotic cell.
Prokaryotic host cell can be any Gram-positive or gram negative bacterium.Gram positive bacterium includes but not limited to, bacillus, fusobacterium, enterococcus spp, ground bacillus genus, lactobacillus, lactococcus, bacillus marinus genus, Staphylococcus, streptococcus and streptomyces.Gram negative bacterium includes but not limited to, campylobacter, intestinal bacteria, Flavobacterium, Fusobacterium, Helicobacterium, mud Bacillaceae, eisseria, Rhodopseudomonas, salmonella and Ureaplasma.
Bacterial host cell can be any bacillus cell, includes but not limited to Alkaliphilic bacillus, bacillus amyloliquefaciens, bacillus brevis, Bacillus circulans, Bacillus clausii, Bacillus coagulans, bacillus firmus, bacillus lautus, bacillus lentus, Bacillus licheniformis, bacillus megaterium, bacillus pumilus, bacstearothermophilus, subtilis and bacillus thuringiensis cell.
Bacterial host cell also can be any streptococcus cell, includes but not limited to streptococcus equisimilis, streptococcus pyogenes, streptococcus uberis and streptococcus equi beast pest subspecies cell.
Bacterial host cell also can be any streptomyces cell, includes but not limited to, does not produce look streptomycete, deinsectization streptomycete, sky blue streptomycete, streptomyces griseus and shallow Streptomyces glaucoviolaceus cell.
Can realize DNA is incorporated into bacillus cell by the following method: protoplast transformation (referring to, for example, Chang and Cohen, 1979, Mol.Gen.Genet.168:111-115), competent cell conversion (referring to, for example, Young and Spizizen, 1961, J.Bacteriol.81:823-829 or Dubnau and Davidoff-Abelson, 1971, J.Mol.Biol.56:209-221), electroporation (referring to, for example, Shigekawa and Dower, 1988, Biotechniques6:742-751) or engage (referring to, for example, Koehler and Thorne, 1987, J.Bacteriol.169:5771-5278).Can realize DNA is incorporated into Bacillus coli cells by the following method: protoplast transformation (referring to, for example, Hanahan, 1983, J.Mol.Biol.166:557-580) or electroporation (referring to, for example, Dower etc., 1988, Nucleic Acids Res.16:6127-6145).Can realize by the following method DNA is incorporated into streptomyces cell: protoplast transformation, electroporation (referring to, for example, Gong etc., 2004, Folia Microbiol. (Praha) 49:399-405), engage (referring to, for example, Mazodier etc., 1989, J.Bacteriol.171:3583-3585), or transduction (referring to, for example, Burke etc., 2001, Proc.Natl.Acad.Sci.USA98:6289-6294).Can realize by the following method DNA is incorporated into Rhodopseudomonas cell: electroporation (referring to, for example, Choi etc., 2006, J.Microbiol.Methods64:391-397) or engage (referring to, for example, Pinedo and Smets, 2005, Appl.Environ.Microbiol.71:51-57).Can realize by the following method DNA is incorporated into streptococcus cell: natural competence (natural competence) (referring to, for example, Perry and Kuramitsu, 1981, Infect.Immun.32:1295-1297), protoplast transformation (referring to, for example, Catt and Jollick, 1991, Microbios.68:189-207), electroporation (referring to, for example, Buckley etc., 1999, Appl.Environ.Microbiol.65:3800-3804) or engage (referring to, for example, Clewell, 1981, Microbiol.Rev.45:409-436).But, can use any method of DNA being introduced to host cell known in the art.
Host cell also can be eukaryote, as Mammals, insect, plant or fungal cell.
Host cell can be fungal cell." fungi " is used in and comprises herein with Xiamen: Ascomycota (Ascomycota), Basidiomycota (Basidiomycota), chytrid door (Chytridiomycota) and Zygomycota (Zygomycota) and oomycetes door (Oomycota) and all mitospore fungies (mitosporic fungi) are (as by Hawksworth etc., in Ainsworth and Bisby ' s Dictionary of The Fungi, the 8th edition, 1995, CAB International, University Press, Cambridge, defines in UK).
Fungal host cells can be yeast cell." yeast " is used in the yeast that comprises ascosporogenous yeast (ascosporogenous yeast) (Endomycetale (Endomycetales)), product load yeast (basidiosporogenous yeast) herein and belong to imperfect fungi (Fungi Imperfecti) (gemma guiding principle (Blastomycetes)).Because may change the future that is sorted in of yeast, for the present invention, yeast is defined as to (the Skinner as Biology and Activities of Yeast, Passmore, compile with Davenport, Soc.App.Bacteriol.Symposium Series No.9,1980) described in.
Yeast host cell can be mycocandida, Hansenula (Hansenula), genus kluyveromyces, Pichia, yeast belong, Schizosaccharomyces or the mould genus cell of Western alpine yarrow, as not yeast, promise ground yeast, ellipsoideus yeast or solution fat the West alpine yarrow mould (Yarrowia lipolytica) cell of Kluyveromyces lactis (Kluyveromyces lactis), saccharomyces carlsbergensis, yeast saccharomyces cerevisiae, saccharomyces diastaticus, Doug Laplace yeast, Crewe.
Fungal host cells can be filamentous fungal cells." filamentous fungus " comprise Mycophyta (Eumycota) and oomycetes door subphylum (as by Hawksworth etc., 1995, see above, define) all thread form.The common mycelia body wall being formed by chitin (chitin), Mierocrystalline cellulose, dextran, chitosan (chitosan), mannosans and other complicated polysaccharide that is characterised in that of filamentous fungus.Extend into row by mycelia and nourish and grow, and carbon katabolism is obligate aerobic.On the contrary, nourishing and growing of for example yeast saccharomyces cerevisiae of yeast undertaken by the gemmation (budding) of unicellular thalline, and carbon katabolism can be fermentable.
Filamentous fungal host cell can be a mould genus of top spore, Aspergillus, aureobasidium genus, the mould genus of smoke pipe (Bjerkandera), intend wax Pseudomonas, Chrysosporium, Coprinus (Coprinus), Coriolus Qu61 (Coriolus), genera cryptococcus, Filibasidium, fusarium, Humicola, Magnaporthe grisea belongs to, Mucor, myceliophthora, the mould genus of Xin Kaoma fat, Neurospora, paecilomyces, Penicillium, flat lead fungi belongs to (Phanerochaete), penetrate arteries and veins Pseudomonas (Phlebia), cud Chytridium, pleurotus (Pleurotus), Schizophyllum, Talaromyces, thermophilic ascomycete belongs to, the mould genus of shuttle spore, Tolypocladium, trametes (Trametes) or Trichoderma cell.
For example, filamentous fungal host cell can be Aspergillus awamori, Aspergillus fumigatus, smelly aspergillus, aspergillus japonicus, Aspergillus nidulans, aspergillus niger, aspergillus oryzae, black thorn smoke pipe bacterium (Bjerkandera adusta), dry plan wax bacterium (Ceriporiopsis aneirina), Ceriporiopsis caregiea, Ceriporiopsis gilvescens, Ceriporiopsis pannocinta, Ceriporiopsis rivulosa, Ceriporiopsis subrufa, worm is intended wax bacterium (Ceriporiopsis subvermispora), Chrysosporium inops, chrysosporium keratinophilum, Chrysosporium lucknowense, Chrysosporium merdarium, felt gold pityrosporion ovale, Chrysosporium queenslandicum, chrysosporium tropicum, Chrysosporium zonatum, Coprinus cinereus (Coprinus cinereus), hairy fungus (Coriolus hirsutus), bar spore shape sickle spore, F.graminearum schw, storehouse prestige sickle spore, machete sickle spore, fusarium graminaria, the red sickle spore of standing grain, different spore sickle spore, albizzia sickle spore, point sickle spore, racemosus sickle spore, pink sickle spore, Williams Elder Twig sickle spore, colour of skin sickle spore, intend branch spore sickle spore, sulphur look sickle spore, circle sickle spore, intend silk spore sickle spore, empiecement sickle spore, Humicola insolens, dredge cotton shape humicola lanuginosa, rice black wool is mould, thermophilic fungus destroyed wire, Neuraspora crassa, penicillium purpurogenum, the yellow flat lead fungi of spore (Phanerochaete chrysosporium), arteries and veins bacterium (Phlebia radiata) is penetrated in radiation, eryngo pick up the ears (Pleurotus eryngii), autochthonal shuttle spore is mould, long wool hair bolt bacterium (Trametes villosa), variable color bolt bacterium (Trametes versicolor), trichoderma harziarum, healthy and free from worry wood is mould, long shoot wood is mould, Trichodermareesei or viride cell.
Fungal cell can be transformed in known mode own by the method that relates to protoplastis formation, protoplast transformation and cell walls regeneration.The appropriate method that is used for transforming Aspergillus and Trichoderma host cell is at EP238023 and Yelton etc., and 1984, Proc.Natl.Acad.Sci.USA81:1470-1474 and Christensen etc., describe in 1988, Bio/Technology6:1419-1422.For the appropriate method that transforms fusarium bacterial classification, by Malardier etc., 1989, Gene78:147-156 and WO96/00787 describe.Can use the method transformed yeast by following document description: Becker and Guarente, in Abelson, J.N. and Simon, M.I. compiles, Guide to Yeast Genetics and Molecular Biology, Methods in Enzymology, Volume194, pp182-187, Academic Press, Inc., New York; Ito etc., 1983, J.Bacteriol.153:163; With Hinnen etc., 1978, Proc.Natl.Acad.Sci.USA75:1920.
Production method
The invention still further relates to the method for generation of polypeptide of the present invention, it comprises: (a) culturing cell under the condition that contributes to produce polypeptide, and described cell produces described polypeptide with its wild-type form; Optionally (b) reclaims described polypeptide.In one aspect, described cell is that capital spore belongs to cell.In yet another aspect, described cell is thermophilic capital spore cell.In yet another aspect, described cell is Penicillium cell.In yet another aspect, described cell is Ai Mosen mould cell.In yet another aspect, described cell is penicillium oxalicum cell.
The invention still further relates to the method for generation of polypeptide of the present invention, it comprises: (a) under the condition that contributes to produce polypeptide, cultivate recombinant host cell of the present invention; Optionally (b) reclaims described polypeptide.
Described cell uses methods known in the art to cultivate in the nutritional medium that is suitable for producing described polypeptide.For example; can be by expressing and/or separate the shake-flask culture under the condition of described polypeptide with allowing in suitable culture medium, or small-scale in laboratory or industrial fermentation tank or large scale fermentation (comprise continuously, in batches, fed-batch or solid state fermentation) carry out culturing cell.Use methods known in the art to cultivate in suitable nutritional medium, described nutritional medium comprises Carbon and nitrogen sources and inorganic salt.Suitable substratum can obtain or can prepare (for example,, in the catalogue of American type culture collection) according to disclosed composition from commercial supplier.If polypeptide is secreted in nutritional medium, this polypeptide can directly reclaim from described substratum.If polypeptide is not secreted, it can reclaim from cell lysate (lysate).
Can detect polypeptide by the method for described polypeptid specificity known in the art.These detection methods include but not limited to use, the formation of enzyme product or the disappearance of enzyme substrates of specific antibody.For example, enzyme assay (enzyme assay) can be used for determining the activity of polypeptide.
Polypeptide can use methods known in the art to reclaim.For example, polypeptide can reclaim by ordinary method from nutritional medium, described ordinary method includes but not limited to collect, centrifugal, filter, extract, spraying is dry, evaporation or precipitation.In one aspect, reclaimed the whole beer that comprises polypeptide of the present invention.
Polypeptide can be by multiple methods known in the art purifying to obtain substantially pure polypeptide, described method includes but not limited to that chromatography (for example, ion-exchange, affine, hydrophobic, chromatofocusing and size exclusion), electrophoresis method (for example, preparative (preparative) isoelectrofocusing), differential solubleness (for example, ammonium sulfate precipitation), SDS-PAGE or extraction (referring to, for example, Protein Purification, Janson and Ryden compile, VCH Publishers, New York, 1989).
In yet another aspect, do not reclaim polypeptide, but use the host cell of the present invention of expressing described polypeptide as the source of described polypeptide.
Plant
The invention still further relates to the plant of separation, for example, transgenic plant, plant part or vegetable cell, it comprises polynucleotide of the present invention, thereby reaches and produce described polypeptide or territory with callable scale.Polypeptide or territory can be reclaimed from plant or plant part.Or, in statu quo (as such) by the plant that contains this polypeptide or territory or plant part for improvement of food or quality of the fodder, for example, improve nutritive value, palatability (palatability) and rheological property (rheological properties), or for destroying antinutritional factor.
Transgenic plant can be dicots (dicotyledonss) or monocotyledonous (monocotyledons).Monocotyledonous example is grass (grasses), as English grass (meadow grass) (bluegrass (blue grass), Poa L. (Poa)); Forage grass (forage grass) is as festuca (Festuca), lolium (Lolium); Cold ground type herbage (temperate grass), as Agrostis (Bentgrass); And cereal, for example, wheat, oat, rye, barley, rice (rice), Chinese sorghum and Zea mays (maize) (corn).
The example of dicotyledons is tobacco (tobacco), beans (legumes), as lupine (lupins), potato, sugar beet (sugar beet), pea, (cruciferous) plant (Cruciferae (family Brassicaceae)) of beans (bean) and soybean (soybean) and Cruciferae, as Cauliflower (cauliflower), Semen Brassicae campestris (rape seed) and the model organism Arabidopis thaliana (Arabidopsis thaliana) being closely related.
The example of plant part is stem (stem), callus (callus), leaf (leaf), root (root), fruit (fruit), seed (seed) and stem tuber (tuber), and the independent body that comprises these parts, for example, epidermis (epidermis), mesophyll (mesophyll), parenchyma (parenchyme), vascular tissue (vascular tissue), meristematic tissue (meristem).Concrete vegetable cell compartment (compartments), as chloroplast(id) (chloroplast), apoplast (apoplast), plastosome (mitochondria), vacuole (vacuole), peroxysome (peroxisome) and tenuigenin (cytoplasm) are also considered to plant part.In addition, any vegetable cell, whatsoever tissue-derived, be all considered to plant part.Similarly, plant part, be used for as separated promoting that the concrete tissue of application of the present invention and cell are also considered to plant part, for example embryo (embryo), endosperm (endosperm), aleuron (aleurone) and seed coat (seed coat).
Be contained in equally the offspring who also has these plants, plant part and vegetable cell in the scope of the invention.
The transgenic plant in express polypeptide or territory or vegetable cell can build according to means known in the art.In brief, build by the following method described plant or vegetable cell: one or more expression construct in coded polypeptide or territory are imported to plant host genome or chloroplast gene group, and be transgenic plant or vegetable cell by the modified plant of gained or vegetable cell breeding.
Expression construct is the nucleic acid construct of the polynucleotide that comprise coded polypeptide or territory expediently, described polynucleotide with in the plant of selecting or plant part, express the required suitable adjusting sequence of these polynucleotide and be operably connected.In addition, expression construct can comprise the selected marker useful for plant identification cell, has integrated expression construct and this construct is incorporated into necessary DNA sequence dna in described plant (the latter depends on the DNA introducing method of use) in described vegetable cell.
Regulate the selection of sequence, the selection of for example promotor and terminator sequence and optionally signal or transit sequence, for instance, based on when, where and how express polypeptide or territory and determine of expectation.For example, the expression of the gene in coded polypeptide or territory can be composing type or induction type, can be maybe growth, stage or tissue-specific, and can the target specific tissue of gene product or plant part be as seed or leaf.Regulate sequence by such as Tague etc., described in 1988, Plant Physiology86:506.
For constructive expression, can use 35S-CaMV, corn ubiquitin 1 or rice Actin muscle 1 promotor (Franck etc., 1980, Cell21:285-294, Christensen etc., 1992, Plant Mo.Biol.18:675-689; Zhang etc., 1991, Plant Cell3:1155-1165).Organ specific promoters can be for example for example, from storage tissue (storage sink tissue) seed, promotor (Edwards and the Coruzzi of potato tuber and fruit, 1990, Ann.Rev.Genet.24:275-303), or such as, from metabolic pool tissue (metabolic sink tissue) merismatic promotor (Ito etc., 1994, Plant Mol.Biol.24:863-878), seed specific promoters is such as the gluten from rice (glutelin), prolamine (prolamin), sphaeroprotein (globulin) or albumin (albumin) promotor (Wu etc., 1998, Plant Cell Physiol.39:885-889), from the broad bean promotor (Conrad etc. of the unknown Seed Storage Protein gene of legumin (legumin) B4 and broad bean (Vicia faba), 1998, J.Plant Physiol.152:708-711), from the promotor (Chen etc. of seed oil body protein (oil body protein), 1998, Plant Cell Physiol.39:935-941), from the storage protein napA promotor of colea (Brassica napus), or the promotor of any other seed-specific well-known in the art, for example, described in WO91/14772.In addition, promotor can be the specific promotor of leaf, as the rbcs promotor (Kyozuka etc. from rice or tomato, 1993, Plant Physiol.102:991-1000), chlorella virus (chlorella virus) VITAMIN B4 methyltransgerase (adenine methyltransferase) gene promoter (Mitra and Higgins, 1994, Plant Mol.Biol.26:85-93), from the aldP gene promoter (Kagaya etc. of rice, 1995, Mol.Gen.Genet.248:668-674), or the promotor of wound induction, as potato pin2 promotor (Xu etc., 1993, Plant Mol.Biol.22:573-588).Similarly, described promotor can be induced by abiotic processing, described abiotic processing such as temperature, arid or salinity change, or the material of the described promotor of activation applying by external source induction, for example ethanol, oestrogenic hormon (oestrogens), plant hormone (plant hormones) are as ethene, dormin (abscisic acid) and gibberic acid (gibberellic acid), and heavy metal.
Promotor enhancer element also can for realize polypeptide or territory in plant compared with high expression level.For example, promotor enhancer element can be intron, and it is placed between promotor and the polynucleotide in coded polypeptide or territory.Such as Xu etc., 1993, see above, disclose and used the First Intron of rice Actin muscle 1 gene to express to strengthen.
Any other parts of selected marker and expression construct can be selected from available those in this area.
Nucleic acid construct is imported to Plant Genome according to routine techniques known in the art, described routine techniques comprises that the conversion of Agrobacterium (Agrobacterium) mediation, virus-mediated conversion, microinjection (microinjection), particle bombardment, biological projectile transform and electroporation (Gasser etc., 1990, Science244:1293; Potrykus, 1990, Bio/Technology8:535; Shimamoto etc., 1989, Nature338:274).
The transgenosis (gene transfer) of Agrobacterium tumefaciens (Agrobacterium tumefaciens) mediation, it is a kind of transgenosis dicotyledons (its summary that produces, referring to Hooykas and Schilperoort, 1992, Plant Mol.Biol.19:15-38), with the method for transforming monocots, although can use other method for transformation for these plants.A kind of monocotyledonous method of transgenosis that produces is with particle (gold or tungsten particle of the microcosmic applying with transfering DNA) bombardment embryo callus (embryonic calli) or developmental embryo (developing embryos) (Christou, 1992, Plant J.2:275-281; Shimamoto, 1994, Curr.Opin.Biotechnol.5:158-162; Vasil etc., 1992, Bio/Technology10:667-674).A kind of alternative method of transforming monocots is based on protoplast transformation, and as by Omirulleh etc., 1993, Plant Mol.Biol.21:415-428 is described.Other method for transformation comprises and is described in U.S. Patent number 6,395, those (both are all incorporated to herein by carrying stating with its entirety) in 966 and 7,151,204.
After conversion, select transformant and the regeneration of the expression construct with importing to become complete plant according to method well known in the art.Conventionally design method for transformation is for eliminating Select gene at regeneration period or in follow-up generation selectivity by the following method: for example, use with two independently T-DNA construct cotransformation or by specificity recombinase-site specific excise Select gene.
Except direct use construct of the present invention directly transforms concrete plant gene type, also can be by the plant with construct be prepared to transgenic plant with the second plant hybridization that lacks this construct.For example, the construct in coded polypeptide or territory can be introduced to specified plant kind by hybridizing, and at all without the plant that directly transforms this given kind.Therefore, the present invention is not only contained from the plant of the cell Direct Regeneration through transforming according to the present invention, also comprises the offspring (progeny) of this type of plant.As for herein, offspring can refer to the descendant (offspring) of any generation of mother plant of preparing according to the present invention.This kind of offspring can comprise the DNA construct of preparing according to the present invention.Hybridization causes transgenosis to be passed through initial germline donor plant germline crossing pollination and introduced plant germline.The limiting examples of this type of step is described in U.S. Patent number 7,151,204.
Plant generates by the method for transformation that backcrosses.For example, this plant comprises the plant of genotype, germline, inbreeding body (inbred) or crossbred (hybrid) that being called backcrosses transforms.
Can use genetic marker to assist one or more transgenosiss of the present invention to infiltrate (introgression) to another from a genetic background gene.The selection that mark is assisted provides the advantage with respect to conventional breeding, is that it can be used for avoiding the mistake being caused by phenotypic variation.Further, genetic marker can provide the data about breeding germplasm relative extent in the individual offspring of specific cross.For example, when this not (otherwise) there is the required genetic background of non-agronomy but there is the plant of required proterties and when breeding parent is hybridized, useful genetic marker selects not only to have objective trait, also has the offspring of the required germplasm of relatively large ratio.In this way, making one or more character genes infiltrate the required generation number of specific genetic background is minimized.
The present invention also relates to the method that produces polypeptide of the present invention or territory, it comprises: (a) under the condition that contributes to produce described polypeptide or territory, cultivate transgenic plant or vegetable cell, the polynucleotide that described plant or vegetable cell comprise coded polypeptide or territory; Optionally (b) reclaims described polypeptide or territory.
Remove or minimizing xylanase activity
The invention still further relates to the method for generation of parental cell mutant, it comprises polynucleotide or its part destroying or lack coding polypeptide of the present invention, when described method causes cultivating under the same conditions, the cell of sudden change produces less described polypeptide compared with parental cell.
Can use method well known in the art (for example, insert, destroy, substitute or disappearance) to build mutant cell by the expression that reduces or eliminates polynucleotide.One preferred aspect, described polynucleotide are inactivations.Polynucleotide to be finished or inactivation can be, for example, and coding region or its part to active key, or express the required regulatory element in coding region.The example of this adjusting or regulating and controlling sequence can be promoter sequence or its funtion part,, is enough to affect the part that polynucleotide are expressed that is.Other regulating and controlling sequence for possible modification includes but not limited to leader sequence, polyadenylation sequence, propeptide sequence, signal peptide sequence, transcription terminator and transcription activator.
Can be by imposing mutagenesis to parental cell, and select the mutant cell wherein expression of polynucleotide having been reduced or eliminated to carry out modification or the inactivation of polynucleotide.Mutagenesis may be specific or random, can be by for example using suitable physics or chemical mutagen to carry out, and by using suitable oligonucleotide to carry out, or by described DNA sequence dna being carried out to the mutagenesis of PCR generation.In addition, can carry out mutagenesis by any combination with these mutagenic compound.
Be suitable for the physics of the object of the invention or the example of chemical mutagen comprise ultraviolet ray (UV) irradiation, azanol, N-methyl-N'-nitro-N-nitrosoguanidine (MNNG), O-methyl hydroxylamine, nitrous acid, ethyl methane sulfonate (ethyl methane sulphonate) (EMS), sodium bisulfite, formic acid and nucleotide analog.
When using when these reagent, conventionally carry out by the following method described mutagenesis: incubation parental cell to be mutagenic there are selected mutagenic compound under conditions suitable time, and screening and/or select shows that genetic expression reduces or without the mutant cells of genetic expression.
Required controlling element realization be transcribed or be translated to the modification of polynucleotide or inactivation also can by the one or more Nucleotide in insertion, replacement or missing gene or its.For example, cause introducing terminator codon thereby can insert or remove Nucleotide, remove initiator codon, or frame is opened in change.The mutagenesis that can produce by site-directed mutagenesis or PCR according to methods known in the art realizes this modification or inactivation.Although described in theory modification can be carried out in vivo, that is, directly on the cell of expressing polynucleotide to be finished, carry out, the face that is preferably as follows is exemplified carries out described modification like that in vitro.
The example of the convenient manner that elimination or minimizing polynucleotide are expressed has based on gene replacement, genetically deficient, or the technology of gene disruption.For example, in gene disruption method, the nucleotide sequence corresponding to endogenous polynucleotide is carried out to mutagenesis in vitro to produce the nucleotide sequence of defective, be then transformed in parental cell to produce dcc gene.By homologous recombination, described defective nucleotide sequence has substituted endogenous polynucleotide.May it is desirable to also coded markings of described defective polynucleotide, it can be used for selecting the transformant that wherein polynucleotide are modified or destroyed.In one aspect, destroy described polynucleotide with selectable mark (as described herein those).
The present invention also relates to the method that suppresses the expression of the polypeptide with xylanase activity in cell, it comprises to cell uses or at cells double-stranded RNA (dsRNA) molecule, the subsequence that wherein said dsRNA comprises polynucleotide of the present invention.One preferred aspect, described dsRNA length is approximately 15,16,17,18,19,20,21,22,23,24,25 or more duplex Nucleotide.
Described dsRNA is preferably siRNA (siRNA) or microRNA (miRNA).One preferred aspect, described dsRNA is the siRNA for suppressing to transcribe.Another preferred aspect, described dsRNA be for suppress translation microRNA.
The present invention also relates to such double-stranded RNA (dsRNA) molecule, it comprises SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or a part for the mature polypeptide encoded sequence of SEQ ID NO:7, for the expression that suppresses described polypeptide in cell.Although the present invention is not subject to the restriction of any concrete mechanism of action, described dsRNA can enter cell and cause the single stranded RNA (ssRNA) of similar or identical sequence, comprises the degraded of endogenous mRNA.In the time that cell is exposed to dsRNA, disturb the process of (RNAi) to be subject to degradation selectivity from homogenic mRNA by being called RNA.
DsRNA of the present invention can be used for gene silencing.In one aspect, the invention provides the method that uses dsRNAi degradation selectivity RNA of the present invention.The method can be in vitro, implement in vitro or body.In one aspect, described dsRNA molecule is used in the sudden change that in cell, organ or animal, systematic function is lost.For the preparation of with the method that uses dsRNA molecular selectivity degradation of rna be as known in the art, referring to, for example U.S. Patent number 6,489,127; 6,506,559; 6,511,824; With 6,515,109.
The invention further relates to the mutant cells of parental cell, the silence of the gene of the polynucleotide that it comprises coded polypeptide or the destruction of its regulating and controlling sequence or disappearance or coding said polypeptide, this causes mutant cells compared with parental cell to produce polypeptide still less or do not produce polypeptide.
Polypeptide defective type mutant cell is natural particularly useful with host cell heterologous polypeptide as expressing.So, the invention further relates to the method for producing natural or heterologous polypeptide, it comprises: (a) under the condition that contributes to produce polypeptide, cultivate mutant cell; Optionally (b) reclaims described polypeptide.It is not natural polypeptide that term " heterologous polypeptide " means host cell, for example, and the variant of native protein.Host cell can comprise the polynucleotide that exceed the described natural or heterologous polypeptide of the coding of a copy.
For cultivating with the method for the interested product of purifying and can being undertaken by methods known in the art.
The present invention is to make us especially interesting for generation of the method for the product of essentially no xylanase activity in the generation of for example enzyme of eucaryon polypeptide, particularly Fungal Protein.Zytase deficient cells also can be used for express in pharmacy significant heterologous protein as hormone, somatomedin, acceptor etc.Term " eucaryon polypeptide " not only comprises natural polypeptides, also comprises by aminoacid replacement, disappearance or interpolation or other such modification and has been modified to strengthen the polypeptide of activity, thermostability, pH tolerance etc., for example enzyme.
In other respects, the present invention relates to the protein of essentially no xylanase activity, it produces by method of the present invention.
Fermented liquid formulation or cell composition
The present invention also relates to fermented liquid formulation and cell composition, and it comprises polypeptide of the present invention.Described fermented liquid product further comprises other composition for zymotechnique, for example cell (host cell that comprises the gene that contains the polypeptide of the present invention of encoding, it is for generation of interested polypeptide), cell debris, biomass, fermention medium and/or tunning.In some embodiments, described composition is the full nutrient solution of having killed cell containing organic acid, the cell being killed and/or cell debris, and substratum.
Term " fermented liquid " produces, does not experience or only experience the recovery of minimum and/or the prepared product of purifying for this paper middle finger by cell fermentation.For example, saturated when microorganisms cultures is grown to, under the condition of restriction carbon, incubation, to allow albumen synthetic (for example, by host cell expression enzyme), and while being secreted into cell culture medium, produces fermented liquid.Described fermented liquid can contain the not classification of the fermented material obtaining in the time that fermentation stops or the inclusion of classification.Typically, fermented liquid is unassorted, and comprises the substratum of using and cell debris that removal (for example, by centrifugal) microorganism cells (for example filamentous fungal cells) exists afterwards.In some embodiments, described fermented liquid is containing the cell culture medium of useful mistake, extracellular enzyme, and (the viable and/or nonviable) microorganism cells that can survive and/or can not survive.
In one embodiment, described fermented liquid formulation and cell composition comprise the first organic acid composition and the second organic acid composition, the organic acid that described the first organic acid composition comprises at least one 1-5 carbon and/or its salt, and organic acid and/or its salt that described the second organic acid composition comprises at least one 6 or more carbon.In a specific embodiments, described the first organic acid composition is acetic acid, formic acid, propionic acid, their salt, or aforementioned two or more mixture, and described the second organic acid composition is phenylformic acid, hexahydrobenzoic acid, 4-methylvaleric acid, toluylic acid, their salt, or aforementioned two or more mixture.
In one aspect, described composition contains organic acid, and optionally further contains the cell and/or the cell debris that have been killed.In one embodiment, the cell being killed described in removing from kill the full nutrient solution of cell and/or cell debris are to provide the not composition containing these components.
Described fermented liquid formulation or cell composition can further comprise sanitas and/or antimicrobial (for example antibacterial) agent, include but not limited to sorbyl alcohol, sodium-chlor, potassium sorbate and other is as known in the art.
Described fermented liquid formulation or cell composition can further comprise plurality of enzymes activity, for example, as one or more (several) are selected from the enzyme of lower group: cellulase, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.Described fermented liquid formulation or cell composition also can comprise one or more (for example several) and be selected from the enzyme of lower group: lytic enzyme, isomerase, ligase enzyme, lyase, oxygen is enzyme or transferring enzyme also, for example alpha-galactosidase, alpha-glucosidase, aminopeptidase, amylase, beta-galactosidase enzymes, beta-glucosidase enzyme, xylobiase, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, at, Maltose 4-glucosyltransferase, deoxyribonuclease, endoglucanase, esterase, glucoamylase, saccharase, laccase, lipase, mannosidase, become glycanase, oxydase, pectin decomposing enzyme, peroxidase, phytase, polyphenoloxidase, proteolytic ferment, rnase, trans-glutaminases or zytase.
The described full nutrient solution of having killed cell or composition can contain the not classification inclusion of the fermented material obtaining in the time that fermentation stops.Typically, the described full nutrient solution of having killed cell or composition contain microorganism cells (for example filamentous fungal cells) are being grown to saturated, and for example, there is afterwards to allow albumen to synthesize (, expressing cellulase and Polyglucosidase) substratum and the cell debris used in incubation under the condition of restriction carbon.In some embodiments, the described full nutrient solution of having killed cell or composition are containing the cell culture medium of useful mistake, extracellular enzyme, and the filamentous fungal cells being killed.In some embodiments, can use method osmotic as known in the art and/or cracking killing the microorganism cells existing in the full nutrient solution of cell or composition.
Full nutrient solution or cell composition are generally liquid as described herein, but can contain insoluble component, as the cell being killed, cell debris, nutrient media components and/or insoluble enzyme.In some embodiments, can remove insoluble component so that the liquid composition of clarification to be provided.
Full nutrient solution formulation of the present invention and cell composition can produce by the method for describing in WO90/15861 or WO2010/096673.
Below provide the embodiment of the preferable use of composition of the present invention.Other condition that the dosage of described composition and composition use can determine based on means known in the art.
Enzyme composition
The invention still further relates to the composition that comprises polypeptide of the present invention.Preferably, described composition this peptide species that has been enrichment.Term " enrichment " shows that the endoglucanase activity of described composition increases with for example at least 1.1 enrichment factor.
Described composition for example can comprise polypeptide of the present invention, as Major Enzymes component, single-component composition.Or, described composition can comprise plurality of enzymes activity, as is selected from one or more (for example several) enzymes of lower group: cellulase, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.Described composition also can comprise one or more (for example several) and be selected from the enzyme of lower group: lytic enzyme, isomerase, ligase enzyme, lyase, oxygen is enzyme or transferring enzyme also, for example alpha-galactosidase, alpha-glucosidase, aminopeptidase, amylase, beta-galactosidase enzymes, beta-glucosidase enzyme, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, at, Maltose 4-glucosyltransferase, deoxyribonuclease, endoglucanase, esterase, glucoamylase, saccharase, laccase, lipase, mannosidase, become glycanase, oxydase, pectin decomposing enzyme, peroxidase, phytase, polyphenoloxidase, proteolytic ferment, rnase, trans-glutaminases, or zytase.
Described composition can be prepared according to method as known in the art, and can be the form of liquid or dry composition.Described composition can be according to method stabilization as known in the art.
Hereinafter provide the example of the preferable use of composition of the present invention.Other condition that the dosage of composition and composition are used can give methods known in the art and determine.
Purposes
The invention still further relates to the technique that following use has polypeptide or its composition of xylanase activity.
The invention still further relates to degradation of fibers cellulosic material or the method containing xylan material, it comprises: under the existence of the polypeptide with xylanase activity of the present invention, with enzyme composition processing cellulose materials or containing xylan material.In one aspect, described technique further comprises that recovery has been degraded or the cellulose materials that transforms or containing xylan material.Described cellulose materials or can separate from insoluble fibrin material or containing xylan materials'use methods known in the art containing the degraded of xylan material or the soluble product of conversion, as for example centrifugal, filtration or gravity settling.
The invention still further relates to the technique that produces tunning, it comprises: (a) under the existence of the polypeptide with xylanase activity of the present invention, by enzyme composition diastatic fiber cellulosic material or containing xylan material; (b) with the fermentation of one or more (for example several) organism of fermentation through the cellulose materials of saccharification or containing xylan material to produce tunning; (c) reclaim tunning from fermentation.
The invention still further relates to fermented cellulose material or the technique containing xylan material, it comprises: for example, with one or more (several) organism of fermentation fermented cellulose materials or containing xylan material, and wherein said cellulose materials or be with enzyme composition saccharification under the existence of the polypeptide with xylanase activity of the present invention containing xylan material.In one aspect, cellulose materials or the fermentation containing xylan material produce tunning.In yet another aspect, described technique also comprises from fermentation recovery tunning.
Technique of the present invention can be for becoming fermentable sugars by cellulose materials or containing the saccharification of xylan material, and fermentable sugars is changed into a lot of useful tunnings, such as fuel, drinking alcohol and/or platform chemicals (platform chemical) (for example acid, alcohol, ketone, gas etc.).The tunning of expecting from cellulose materials or containing xylan material production is usually directed to pre-treatment, enzymic hydrolysis (saccharification) and fermentation.
Can use the ordinary method of this area to complete according to cellulose materials of the present invention or containing the processing of xylan material.In addition, technique of the present invention can be used any conventional biomass processing equipment being configured to according to invention operation to carry out.
Hydrolysis (saccharification) and fermentation, point other or simultaneously, include but not limited to, hydrolysis and the common fermentation (HHCF) of the hydrolysis separating and fermentation (SHF), synchronous glycosylation and fermentation (SSF), synchronous glycosylation and common fermentation (SSCF), the hydrolysis mixing and fermentation (HHF), the hydrolysis separating and common fermentation (SHCF), mixing, with direct microbial transformation (DMC), sometimes also referred to as associating biological processing (consolidated bioprocessing, CBP).SHF use the treatment step that separates taking first by enzymatic hydrolysis of cellulosic material as fermentable sugars, for example, glucose, cellobiose and pentose monomer, then become fermentable sugars fermentation ethanol.In SSF, the fermentation that the enzymic hydrolysis of cellulose materials and sugar become ethanol is combined in (Philippidis, G.P., 1996 in a step, Cellulose bioconversion technology, in Handbook on Bioethanol:Production and Utilization, Wyman, C.E compiles, Taylor & Francis, Washington, DC, 179-212).SSCF comprises the common fermentation (Sheehan of multiple sugar, and Himmel J., M., 1999, Enzymes, energy and the environment:A strategic perspective on the U.S.Department of Energy ' s research and development activities for bioethanol, Biotechnol.Prog.15:817-827).HHF outside saccharification and hydrolysing step, also comprises independent hydrolysing step at the same time, and described each step can be carried out in same reactor.Step in HHF process can be carried out in different temperature, that is, the saccharification of high temperature enzyme process, the lesser temps that then can tolerate at fermentation strain carries out SSF.DMC for example, has combined all three processes (enzyme produces, is hydrolyzed and fermentation) in one or more (several) step, wherein use identical organism to produce for cellulose materials being changed into fermentable sugars and fermentable sugars being changed into enzyme (the Lynd L.R. of end product, Weimer, P.J., van Zyl, W.H., and Pretorius, I.S., 2002, Microbial cellulose utilization:Fundamentals and biotechnology, Microbiol.Mol.Biol.Reviews66:506-577).Be understandable that herein, any method as known in the art, comprises pre-treatment, enzymic hydrolysis (saccharification), fermentation, or their combination, all can be used for implementing technique of the present invention.
Conventional equipment can comprise fed-batch formula stirred reactor, batch-type stirred reactor, have Continuous Flow stirred reactor and/or continuous piston flow column reactor (the Fernanda de Castilhos Corazza of ultrafiltration, Fl á vio Faria de Moraes, Gisella Maria Zanin and Ivo Neitzel, 2003, Optimal control in fed-batch reactor for the cellobiose hydrolysis, Acta Scientiarum.Technology25:33-38, Gusakov, and Sinitsyn A.V., A.P., 1985, Kinetics of the enzymatic hydrolysis of cellulose:1.A mathematical model for a batch reactor process, Enz.Microb.Technol.7:346-352), griding reaction device (Ryu, and Lee S.K., J.M., 1983, Bioconversion of waste cellulose by using an attrition bioreactor, Biotechnol.Bioeng.25:53-65), or there is the intensively stirred reactor (Gusakov being caused by electromagnetic field, A.V., Sinitsyn, A.P., Davydkin, I.Y., Davydkin, V.Y., Protas, O.V., 1996, Enhancement of enzymatic cellulose hydrolysis using a novel type of bioreactor with intensive stirring induced by electromagnetic field, Appl.Biochem.Biotechnol.56:141-153).Other type of reactor comprises: fluidized-bed, up-flow layer (upflow blanket), immobilization and the reactor of extruding type for being hydrolyzed and/or fermenting.
pre-treatment.In the enforcement of technique of the present invention, can use any preprocessing process known in the art destroy the cellulose materials of plant cell wall or contain xylan material component (Chandra etc., 2007, Substrate pretreatment:The key to effective enzymatic hydrolysis of lignocellulosics? Adv.Biochem.Engin./Biotechnol.108:67-93; Galbe and Zacchi, 2007, Pretreatment of lignocellulosic materials for efficient bioethanol production, Adv.Biochem.Engin./Biotechnol.108:41-65; Hendriks and Zeeman, 2009, Pretreatments to enhance the digestibility of lignocellulosic biomass, Bioresource Technol.100:10-18; Mosier etc., 2005, Features of promising technologies for pretreatment of lignocellulosic biomass, Bioresource Technol.96:673-686; Taherzadeh and Karimi, 2008, Pretreatment of lignocellulosic wastes to improve ethanol and biogas production:A review, Int.J.of Mol.Sci.9:1621-1651; Yang and Wyman, 2008, Pretreatment:the key to unlocking low-cost cellulosic ethanol, Biofuels Bioproducts and Biorefining-Biofpr.2:26-40).
Cellulose materials or also can use method as known in the art to carry out particle size reduction, screening, pre-soaking, wetting, washing and/or conditioning (conditioning) before pre-treatment containing xylan material.
Conventional pre-treatment includes but not limited to, steam pre-treatment (following or do not follow explosion), dilute acid pretreatment, hot-water pretreatment, alkali pre-treatment, Calx preconditioning, wet oxidation, wet explosion, the explosion of ammonia fiber, organic solvent pre-treatment and Biological Pretreatment.Other pre-treatment comprises ammonia diafiltration, ultrasonic, electroporation, microwave, supercritical CO 2, overcritical H 2o, ozone, ionic liquid and gamma-radiation pre-treatment.
Can be before hydrolysis and/or fermentation pretreatment of fiber cellulosic material or containing xylan material.Pre-treatment is preferably carried out before hydrolysis.Or pre-treatment can carry out discharging fermentable sugars with enzymic hydrolysis, as glucose, wood sugar and/or cellobiose simultaneously.In most of the cases, pre-treatment step itself makes some Wood Adhesives from Biomass become fermentable sugars (even in the situation that not there is not enzyme).
Steam pre-treatment.In steam pre-treatment, heat cellulose materials or contain xylan material to destroy plant cell wall composition, comprise xylogen, hemicellulose and Mierocrystalline cellulose, make Mierocrystalline cellulose and other fraction, for example hemicellulose, can be contacted by enzyme.Pass to or by reaction vessel by cellulose materials or containing xylan material, wherein injecting steam to be to increase temperature to the temperature and pressure needing, and keeps therein the reaction times of expecting.Steam pre-treatment is preferably at 140-250 DEG C, for example 160-200 DEG C, or 170-190 DEG C carried out, and wherein optimum temperature range depends on the interpolation of chemical catalyst.The preferred 1-60 minute of the residence time of steam pre-treatment, for example 1-30 minute, 1-20 minute, 3-12 minute, or 4-10 minute, wherein the optimum residence time depends on the interpolation of temperature range and chemical catalyst.Steam pre-treatment allows relatively high solid substance heap(ed) capacity, to such an extent as to cellulose materials or mostly just become moist containing xylan material in preprocessing process.Steam pre-treatment often combines with the explosion blowing (explosive discharge) of pretreated material, this is called steam explosion,, flickering is to the turbulent flow of normal atmosphere and material fast, with surface-area (Duff and the Murray that can contact by broken increase, 1996, Bioresource Technology855:1-33; Galbe and Zacchi, 2002, Appl.Microbiol.Biotechnol.59:618-628; U.S. Patent application No.20020164730).In steam pre-treatment process, hemicellulose acetyl group is cut open, and the sour autocatalysis hemicellulose partial hydrolysis obtaining becomes monose and oligosaccharides.Xylogen is only removed with limited degree.
Chemical Pretreatment: term " chemical treatment " refers to promote any chemical treatment of Mierocrystalline cellulose, hemicellulose and/or lignin separation and/or release.This kind of pre-treatment can be converted into amorphous cellulose by crystal fibre element.The example of suitable Chemical Pretreatment technique comprises for example dilute acid pretreatment, Calx preconditioning, wet oxidation, ammonia fiber/freezing explosion (AFEX), ammonia diafiltration (APR), ionic liquid and organic solvent pre-treatment.
Before the steam pre-treatment of being everlasting, add catalyzer as H 2sO 4or SO 2(common 0.3 to 5%w/w), it can reduce the time, reduces temperature, increases the rate of recovery, and improves enzymic hydrolysis (Ballesteros etc., 2006, Appl.Biochem.Biotechnol.129-132:496-508; Varga etc., 2004, Appl.Biochem.Biotechnol.113-116:509-523; Sassner etc., 2006, Enzyme Microb.Technol.39:756-762).In dilute acid pretreatment, by cellulose materials or containing xylan material and diluted acid (normally H 2sO 4) and water mix to form slurry, by the temperature that is steam heated to expectation, and after one period of residence time flickering to normal atmosphere.Can carry out dilute acid pretreatment by a lot of reactor design forms, for example, plug flow reactor, counter-current reactor or continuous countercurrent shrink bed bioreactor (Duff and Murray, 1996, supra; Schell etc., 2004, Bioresource Technol.91:179-188; Lee etc., 1999, Adv.Biochem.Eng.Biotechnol.65:93-115).
Can also use several pretreatment processs under alkaline condition.These alkali pre-treatment include, but not limited to sodium hydroxide, lime, wet oxidation, ammonia diafiltration (APR) and ammonia fiber/freezing explosion (AFEX).
Carry out Calx preconditioning the temperature of 85-150 DEG C with calcium oxide or calcium hydroxide, the residence time was from 1 hour to several days (Wyman etc., 2005, Bioresource Technol.96:1959-1966; Mosier etc., 2005, Bioresource Technol.96:673-686).WO2006/110891, WO2006/110899, WO2006/110900 and WO2006/110901 disclose the pretreatment process that uses ammonia.
Wet oxidation is a kind of hot pre-treatment, conventionally carries out 5-15 minute at 180-200 DEG C, adds oxygenant as hydrogen peroxide or overvoltage oxygen (Schmidt and Thomsen, 1998, Bioresource Technol.64:139-151; Palonen etc., 2004, Appl.Biochem.Biotechnol.117:1-17; Varga etc., 2004, Biotechnol.Bioeng.88:567-574; Martin etc., 2006, J.Chem.Technol.Biotechnol.81:1669-1677).Pre-treatment is with preferred 1-40% dry-matter, and for example 2-30% dry-matter, or 5-20% dry-matter carries out, and often by add alkali as sodium carbonate increases initial pH.
The amending method of wet oxidation pretreatment process, is called wet explosion (combination of wet oxidation and steam explosion), can process the dry-matter up to 30%.In wet explosion, in preprocessing process, after certain residence time, introduce oxygenant.Then finish pre-treatment (WO2006/032282) by flickering to normal atmosphere.
Ammonia fiber explosion (AFEX) relates in moderate temperature if 90-150 DEG C and high pressure are as 17-20bar, with liquefied ammonia or ammonia by cellulose materials or containing xylan material processing 5-10 minute, wherein dry matter content can be up to 60% (Gollapalli etc., 2002, Appl.Biochem.Biotechnol.98:23-35; Chundawat etc., 2007, Biotechnol.Bioeng.96:219-231; Alizadeh etc., 2005, Appl.Biochem.Biotechnol.121:1133-1141; Teymouri etc., 2005, Bioresource Technol.96:2014-2018).In AFEX preprocessing process, Mierocrystalline cellulose keeps relative complete with hemicellulose.Xylogen-saccharide complex is cut open.
Organic solvent pre-treatment is by using aqueous ethanol (40-60% ethanol) 160-200 DEG C of extraction 30-60 minute and by cellulose materials or containing xylan material delignification (Pan etc., 2005, Biotechnol.Bioeng.90:473-481; Pan etc., 2006, Biotechnol.Bioeng.94:851-861; Kurabi etc., 2005, Appl.Biochem.Biotechnol.121:219-230).Often add sulfuric acid as catalyzer.In organic solvent pre-treatment, most of hemicellulose and xylogen are removed.
Other examples of suitable pretreatment process are as Schell etc., 2003, Appl.Biochem and Biotechn.Vol.105-108:69-85, with Mosier etc., 2005, Bioresource Technology96:673-686, and the U.S. openly applies for described in 2002/0164730.
In one aspect, Chemical Pretreatment is preferably as dilute acid pretreatment, and more preferably the continuous dilute acid pretreatment of conduct carries out.Acid is sulfuric acid normally, but also can use other acid, as acetic acid, citric acid, nitric acid, phosphoric acid, tartrate, succsinic acid, hydrogenchloride or its mixture.Weak acid (mild acid) is processed at preferred 1-5, for example 1-4, or the pH scope of 1-2.5 is carried out.In one aspect, acid concentration is in preferably 0.01 to 10wt% acid, for example the scope of 0.05 to 5wt% acid or 0.1 to 2wt% acid.Acid is contacted with cellulose materials or containing xylan material, and at preferred 140-200 DEG C, for example the temperature of 165-190 DEG C of scope keeps the time of 1 to 60 minute.
In yet another aspect, pre-treatment occurs in aqueous slurry.Aspect preferred, in preprocessing process cellulose materials or containing xylan material with preferred 10-80wt%, for example 20-70wt% or 30-60wt%, according to appointment the amount of 40wt% exist.Pretreated cellulose materials or can not wash or use this area any known method washing containing xylan material, for example, washes with water.
Mechanical pretreatment or physics pre-treatment: term " mechanical pretreatment " or " physics pre-treatment " refer to the pre-treatment that any promotion granular size reduces.For example, this kind of pre-treatment can relate to various types of grindings (grinding) or grind (milling) (for example, dry grinding, wet-milling or vibratory milling).
Cellulose materials or containing xylan material can through physics (machinery) and Chemical Pretreatment the two.Machinery or physics pre-treatment can with following coupling: decatize/steam explosion, aquathermolysis (hydrothermolysis), diluted acid or weak acid processing, high temperature, autoclaving, radiation (for example microwave radiation), or its combination.In one aspect, high end finger is preferably approximately 100 to about 400psi, for example pressure of approximately 150 scopes to about 250psi.In yet another aspect, high temperature refers to approximately 100 to 300 DEG C, for example the temperature of approximately 140 to approximately 200 DEG C of scopes.One preferred aspect, machinery or physics pre-treatment utilize in use in the batchwise process of the vapor gun hydrolyzer system of high temperature and high pressure (for example, from Sunds Defibrator AB, the Sunds Hydrolyzer of Sweden) as defined above to be carried out.Described physics and chemistry pre-treatment can optionally sequentially be carried out or carry out simultaneously.
Therefore, one preferred aspect, carry out physics (machinery) or Chemical Pretreatment to cellulose materials or containing xylan material, or their any combination, to promote separation and/or the release of Mierocrystalline cellulose, hemicellulose and/or xylogen.
Biological Pretreatment: term " Biological Pretreatment " refers to promote Mierocrystalline cellulose, hemicellulose and/or xylogen from cellulose materials or containing any Biological Pretreatment of xylan material separation and/or release.Biological Pretreatment Techniques can comprise apply the microorganism of dissolved lignin and/or enzyme (referring to, for example, Hsu, T.-A., 1996, Pretreatment of biomass, in Handbook on Bioethanol:Production and Utilization, Wyman, C.E compiles, Taylor & Francis, Washington, DC, 179-212; Ghosh and Singh, 1993, Physicochemical and biological treatments for enzymatic/microbial conversion of lignocellulosic biomass, Adv.Appl.Microbiol.39:295-333; McMillan, J.D., 1994, Pretreating lignocellulosic biomass:a review, in Enzymatic Conversion of Biomass for Fuels Production, Himmel, M.E., Baker, J.O., and Overend, R.P., compiles, ACS Symposium Series566, American Chemical Society, Washington, DC, the 15th chapter; Gong, C.S., Cao, N.J., Du, J., and Tsao, G.T., 1999, Ethanol production from renewable resources, in Advances in Biochemical Engineering/Biotechnology, Scheper, T., compile Springer-Verlag Berlin Heidelberg, Germany, 65:207-241; Olsson and Hahn-Hagerdal, 1996, Fermentation of lignocellulosic hydrolysates for ethanol production, Enz.Microb.Tech.18:312-331; With Vallander and Eriksson, 1990, Production of ethanol from lignocellulosic materials:State of the art, Adv.Biochem.Eng./Biotechnol.42:63-95).
saccharification.In hydrolysing step, by cellulose materials or containing xylan material, for example pretreated cellulose materials or be hydrolyzed so that Mierocrystalline cellulose and hemicellulose are resolved into fermentable sugars, as glucose, cellobiose, wood sugar, xylulose, pectinose, seminose, semi-lactosi and/or soluble oligosaccharides containing xylan material.Hydrolysis utilizes enzyme composition to have under the existence of polypeptide of xylanase activity enzymatic as described herein in the present invention to carry out.The enzyme component of composition can also add simultaneously or sequentially.
Enzymic hydrolysis preferably, under the condition of easily being determined by those skilled in the art, is carried out in suitable aqueous environment.In one aspect, hydrolysis is in the activity that is suitable for enzyme component, for carrying out under enzyme component optimal conditions.Hydrolysis can be carried out with fed-batch or continuous process, in successive processes, fills into gradually by cellulose materials or containing xylan material, for example, fills in the hydrating solution containing enzyme.
Saccharification is carried out conventionally in stirred-tank reactor or fermentor tank under controlled pH, temperature and mixing condition.Suitable treatment time, temperature and pH condition can easily be determined by those skilled in the art.For example, saccharification is sustainable reaches 200 hours, but conventionally carries out preferably approximately 12 to approximately 120 hours, and for example approximately 16 to approximately 72 hours, or approximately 24 to approximately 48 hours.Temperature is at preferably approximately 25 DEG C to approximately 70 DEG C, and for example approximately 30 DEG C to approximately 65 DEG C, approximately 40 DEG C to approximately 60 DEG C, or the scope of approximately 50 DEG C to 55 DEG C.PH is preferably approximately 3 to approximately 8, and for example approximately 3.5 to approximately 7, approximately 4 to approximately 6, or approximately 5.0 to approximately 5.5 scope.Dry solid content is preferred approximately 5 to about 50wt%, and for example approximately 10 to about 40wt%, or approximately 20 scopes to about 30wt%.
Enzyme composition can comprise any degradation of fibers cellulosic material or albumen containing xylan material of can be used for.
In one aspect, described enzyme composition comprises or also comprises one or more (for example several) and is selected from the albumen of lower group: cellulase, have the GH61 polypeptide of cellulolytic enhancing activity, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.In yet another aspect, described cellulase for example, is selected from the enzyme of lower group for preferred one or more (several): endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.In yet another aspect, described hemicellulase for example, is selected from the enzyme of lower group for preferred one or more (several): acetyl mannan esterase, acetyl xylan esterase, arabanase, arabinofuranosidase, coumaric acid esterase, feruloyl esterase, tilactase, glucuronidase, glucuronic acid esterase, mannonase mannosidase, zytase and xylosidase.
In yet another aspect, described enzyme composition comprises one or more (for example several) cellulolytic enzymes.In yet another aspect, described enzyme composition comprises or further comprises one or more (for example several) hemicellulose lytic enzymes.In yet another aspect, described enzyme composition comprises one or more (for example several) cellulolytic enzymes and one or more (for example several) hemicellulose lytic enzymes.In yet another aspect, described enzyme composition comprises one or more (for example several) and is selected from the enzyme of lower group: cellulolytic enzyme and hemicellulose lytic enzyme.In yet another aspect, described enzyme composition comprises endoglucanase.In yet another aspect, described enzyme composition comprises cellobiohydrolase.In yet another aspect, described enzyme composition comprises beta-glucosidase enzyme.In yet another aspect, described enzyme composition comprises the polypeptide with cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises endoglucanase and the polypeptide with cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises cellobiohydrolase and the polypeptide with cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises beta-glucosidase enzyme and the polypeptide with cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises endoglucanase and cellobiohydrolase.In yet another aspect, described enzyme composition comprises endoglucanase and beta-glucosidase enzyme.In yet another aspect, described enzyme composition comprises cellobiohydrolase and beta-glucosidase enzyme.In yet another aspect, described enzyme composition comprises endoglucanase, cellobiohydrolase and has the polypeptide of cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises endoglucanase, beta-glucosidase enzyme and has the polypeptide of cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises cellobiohydrolase, beta-glucosidase enzyme and has the polypeptide of cellulolytic enhancing activity.In yet another aspect, described enzyme composition comprises endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.In yet another aspect, described enzyme composition comprises endoglucanase, cellobiohydrolase, beta-glucosidase enzyme and has the polypeptide of cellulolytic enhancing activity.
In yet another aspect, described enzyme composition comprises acetyl mannan esterase.In yet another aspect, described enzyme composition comprises acetyl xylan esterase.In yet another aspect, described enzyme composition comprises arabanase (for example α-L-arabanase).In yet another aspect, described enzyme composition comprises arabinofuranosidase (for example α-l-arabfuranglycosidase).In yet another aspect, described enzyme composition comprises coumaric acid esterase.In yet another aspect, described enzyme composition comprises feruloyl esterase.In yet another aspect, described enzyme composition comprises tilactase (for example alpha-galactosidase and/or beta-galactosidase enzymes).In yet another aspect, described enzyme composition comprises glucuronidase (for example α-D-glucuronidase).In yet another aspect, described enzyme composition comprises glucuronic acid esterase.In yet another aspect, described enzyme composition comprises mannase.In yet another aspect, described enzyme composition comprises mannosidase (for example beta-Mannosidase).In yet another aspect, described enzyme composition comprises zytase.One preferred aspect, described zytase is family's 10 zytases.In yet another aspect, described enzyme composition comprises xylosidase (for example xylobiase).
In yet another aspect, described enzyme composition comprises esterase.In yet another aspect, described enzyme composition comprises claviformin.In yet another aspect, described enzyme composition comprises laccase.In yet another aspect, described enzyme composition comprises lignin decomposition enzyme.Another preferred aspect, described lignin decomposition enzyme is manganese peroxidase.Another preferred aspect, described lignin decomposition enzyme is lignin peroxidase.Another preferred aspect, described lignin decomposition enzyme be produce H 2o 2enzyme.In yet another aspect, described enzyme composition comprises polygalacturonase.In yet another aspect, described enzyme composition comprises peroxidase.In yet another aspect, described enzyme composition comprises proteolytic enzyme.In yet another aspect, described enzyme composition comprises swollenin.
In technique of the present invention, enzyme can be in saccharification, saccharification and fermentation, or add before fermentation or in process.
One or more (for example several) components of described enzyme composition can be the combination of wild-type protein, recombinant protein or wild-type protein and recombinant protein.For example, one or more (for example several) components can be the native protein of cell, and it is one or more (for example several) other components with recombinant expressed enzyme composition as host cell.One or more (for example several) components of enzyme composition can be produced as independent component, then be combined to form enzyme composition.Described enzyme composition can be the combination of polycomponent and single component albumen prepared product.
Can be any applicable form for the enzyme of technique of the present invention, for example fermented liquid formulation, cell composition, containing or not containing the cell pyrolysis liquid of cell debris, the enzyme prepared product of half purifying or purifying, or as the host cell in the source of enzyme.Described enzyme composition can be dry powder or particle, non-dusting particle, liquid, the shielded enzyme of stabilization liquid or stabilization.Liquid enzymes prepared product can be according to the technique of establishing, and for example, by adding stablizer as sugar, sugar alcohol or other polyvalent alcohols, and/or lactic acid or other organic acids carry out stabilization.
There is the enzyme of xylanase activity and the optimal dose of polypeptide depends on several factors, it includes but not limited to, the mixture of cellulose decomposition and/or hemicellulose lytic enzyme component, cellulose materials or containing xylan material, cellulose materials or containing the concentration of xylan material, cellulose materials or for example, containing pre-treatment, temperature, time, the pH of xylan material with comprise fermenting organism body (, the yeast of synchronous glycosylation and fermentation).
In one aspect, cellulolytic enzyme or hemicellulose lytic enzyme are approximately 0.5 to about 50mg for cellulose materials or containing the significant quantity of xylan material, for example approximately 0.5 to about 40mg, approximately 0.5 to about 25mg, approximately 0.75 to about 20mg, approximately 0.75 to about 15mg, and approximately 0.5 to about 10mg, or approximately 2.5 to about 10mg every g cellulose materialss or containing xylan material.
In yet another aspect, the polypeptide with xylanase activity is approximately 0.01 to about 50.0mg for cellulose materials or containing the significant quantity of xylan material, and for example approximately 0.01 to about 40mg, approximately 0.01 to about 30mg, approximately 0.01 to about 20mg, and approximately 0.01 to about 10mg, and approximately 0.01 to about 5mg, approximately 0.025 to about 1.5mg, approximately 0.05 to about 1.25mg, and approximately 0.075 to about 1.25mg, and approximately 0.1 to about 1.25mg, approximately 0.15 to about 1.25mg, or approximately 0.25 to about 1.0mg every g cellulose materials or containing xylan material.
In yet another aspect, the polypeptide with xylanase activity is approximately 0.005 to about 1.0g for the significant quantity of cellulolytic enzyme or hemicellulose lytic enzyme, for example approximately 0.01 to about 1.0g, approximately 0.15 to about 0.75g, approximately 0.15 to about 0.5g, approximately 0.1 to about 0.5g, and approximately 0.1 to about 0.25g, or approximately 0.05 to about 0.2g every g cellulolytic enzyme or hemicellulose lytic enzyme.
There is the polypeptide of cellulose decomposition enzymic activity or hemicellulose lytic enzyme activity, and other protein/polypeptide that can be used for cellulose materials or contain the degraded of xylan material, the GH61 polypeptide (being referred to as in this article the polypeptide with enzymic activity) for example with cellulolytic enhancing activity can be derived from or obtain from any suitable source, comprises bacterium, fungi, yeast, plant or Mammals source.Term " acquisition " also means in this article this enzyme and can in host living beings, use described method restructuring to produce herein, the enzyme wherein producing through restructuring is natural or external source for host living beings, or there is the aminoacid sequence of modification, for example, the amino acid that there is one or more (for example several) disappearance, inserts and/or replace, the enzyme that restructuring produces, it is fragment and/or mutant or the enzyme producing by amino acid Shuffling Method known in the art of natural acid sequence.What in the implication of natural enzyme, contain is natural variant, and what in the implication of external enzyme, contain is the variant that restructuring (as by site-directed mutagenesis or rearrangement) obtains.
The polypeptide with enzymic activity can be bacterial peptide.For example, described polypeptide can be that gram positive bacterium polypeptide is as bacillus (Bacillus), streptococcus (Streptococcus), streptomyces (Streptomyces), Staphylococcus (Staphylococcus), enterococcus spp (Enterococcus), lactobacillus (Lactobacillus), lactococcus (Lactococcus), fusobacterium (Clostridium), ground bacillus belongs to (Geobacillus), pyrolysis Mierocrystalline cellulose Pseudomonas (Caldicellulosiruptor), hot acid Pseudomonas (Acidothermus), Thermobifidia or bacillus marinus belong to (Oceanobacillus) polypeptide, described polypeptide has enzymic activity, or gram negative bacterium polypeptide, as intestinal bacteria, Rhodopseudomonas (Pseudomonas), salmonella (Salmonella), campylobacter (Campylobacter), Helicobacterium (Helicobacter), Flavobacterium (Flavobacterium), Fusobacterium (Fusobacterium), mud Bacillaceae (Ilyobacter), eisseria (Neisseria) or Ureaplasma (Ureaplasma) polypeptide, described polypeptide has enzymic activity.
In one aspect, described polypeptide is Alkaliphilic bacillus, bacillus amyloliquefaciens, bacillus brevis, Bacillus circulans, Bacillus clausii, Bacillus coagulans, bacillus firmus, bacillus lautus, bacillus lentus, Bacillus licheniformis, bacillus megaterium, bacillus pumilus, bacstearothermophilus, subtilis or the bacillus thuringiensis polypeptide with enzymic activity.
Another preferred aspect, described polypeptide is streptococcus equisimilis, streptococcus pyogenes, streptococcus uberis or the streptococcus equi beast pest subspecies polypeptide with enzymic activity.
Another preferred aspect, described polypeptide be there is enzymic activity do not produce look streptomycete, deinsectization streptomycete, sky blue streptomycete, streptomyces griseus or shallow Streptomyces glaucoviolaceus polypeptide.
The polypeptide with enzymic activity can be also fungi polypeptide, and more preferably yeast polypeptides genus polypeptide as mould in mycocandida, genus kluyveromyces, Pichia, yeast belong, Schizosaccharomyces or Western alpine yarrow, and it has enzymic activity, or more preferably filamentous fungus polypeptide as the mould genus of branch top spore, Agaricus, Alternaria, Aspergillus, aureobasidium genus, Botryospaeria, intend wax Pseudomonas, Chaetomidium, Chrysosporium, Claviceps, Cochliobolus, Coprinus, Coptotermes, rod softgel shell belongs to, the red shell Pseudomonas of hidden clump, genera cryptococcus, Diplodia, Exidia, Filibasidium, fusarium, Gibberella, full flagellum Eimeria, Humicola, rake teeth Pseudomonas, Agaricus, Leptospaeria, Magnaporthe grisea belongs to, Melanocarpus, Polyporus, Mucor, myceliophthora, the mould genus of Xin Kaoma fat, Neurospora, paecilomyces, Penicillium, flat lead fungi belongs to, cud Chytridium, Poitrasia, false black Peziza, Pseudotrichonympha, Rhizomucor, Schizophyllum, capital spore belongs to, Talaromyces, thermophilic ascomycete belongs to, the mould genus of shuttle spore, Tolypocladium, Trichoderma, Peziza becomes mildewed, Verticillium, Volvaria or Xylaria polypeptide, it has enzymic activity.
In one aspect, described polypeptide is saccharomyces carlsbergensis, yeast saccharomyces cerevisiae, saccharomyces diastaticus, Doug Laplace yeast, not yeast, promise ground yeast or the ellipsoideus yeast polypeptide of Crewe with enzymic activity.
In yet another aspect, described polypeptide is that to have the solution fiber branch top spore of enzymic activity mould, microorganism Aspergillus aculeatus, Aspergillus awamori, Aspergillus fumigatus, smelly aspergillus, aspergillus japonicus, Aspergillus nidulans, aspergillus niger, aspergillus oryzae, chrysosporium keratinophilum, Chrysosporium lucknowense, chrysosporium tropicum, Chrysosporium merdarium, Chrysosporium inops, felt gold pityrosporion ovale, Chrysosporium queenslandicum, Chrysosporium zonatum, bar spore shape sickle spore, F.graminearum schw, storehouse prestige sickle spore, machete sickle spore, fusarium graminaria, the red sickle spore of standing grain, different spore sickle spore, albizzia sickle spore, point sickle spore, racemosus sickle spore, pink sickle spore, Williams Elder Twig sickle spore, colour of skin sickle spore, intend branch spore sickle spore, sulphur look sickle spore, circle sickle spore, intend silk spore sickle spore, empiecement sickle spore, ash humicola lanuginosa, Humicola insolens, dredge cotton shape humicola lanuginosa, white rake teeth bacterium, rice black wool is mould, thermophilic fungus destroyed wire, Neuraspora crassa, penicillium funiculosum, penicillium purpurogenum, the flat lead fungi of yellow spore, Thielavia achromatica, Thielavia albomyces, Thielavia albopilosa, Australia shuttle spore is mould, Thielavia fimeti, little spore shuttle spore is mould, ovum spore shuttle spore is mould, Thielavia peruviana, knurl spore shuttle spore is mould, hair shuttle spore is mould, Thielavia subthermophila, autochthonal shuttle spore is mould, trichoderma harziarum, healthy and free from worry wood is mould, long shoot wood is mould, Trichodermareesei, viride or brown spore cup fungi (Trichophaea saccata) polypeptide that becomes mildewed.
Can also use the mutant through chemically modified or protein engineering transformation of the polypeptide with enzymic activity.
One or more (for example several) components of described composition can be restructuring components, that is, by described in clones coding separately the DNA sequence dna of component and subsequently with this DNA sequence dna transformant expression in host (referring to, for example, WO91/17243 and WO91/17244) and produce.Described host is heterologous host (enzyme is external source to host) preferably, but this host can be also homology host (enzyme is natural to host) under certain condition.Monocomponent fibre element decomposition of protein can also be prepared by such protein of purifying from fermented liquid.
In one aspect, described one or more (for example several) cellulolytic enzymes comprise commercial cellulolytic enzyme prepared product.The example that is applicable to the cellulolytic enzyme prepared product of business of the present invention comprises, for example, and CELLIC tMcTec (Novozymes A/S), CELLIC tMcTec2 (Novozymes A/S), (Novozymes A/S), CELLUCLAST tM(Novozymes A/S), NOVOZYM tM188 (Novozymes A/S), CELLUZYME tM(Novozymes A/S), CEREFLO tM(Novozymes A/S) and ULTRAFLO tM(Novozymes A/S), ACCELERASE tM(Genencor Int.), LAMINEX tM(Genencor Int.), SPEZYME tMcP (Genencor Int.), (DSM), (DSM), ROHAMENT tM7069W ( gmbH), (Dyadic International, Inc.), (Dyadic International, Inc.) or (Dyadic International, Inc.).Described cellulose enzyme with solid substance approximately 0.001 to about 5.0wt%, for example solid substance approximately 0.025 to about 4.0wt%, or approximately 0.005 significant quantity to about 2.0wt% of solid is added.
Can include but are not limited to for the example of the bacterium endoglucanase of technique of the present invention, separate fiber hot acid bacterium (Acidothermus cellulolyticus) endoglucanase (WO91/05039; WO93/15186; United States Patent (USP) 5,275,944; WO96/02551; United States Patent (USP) 5,536,655, WO00/70031, WO05/093050); Thermobifida fusca EG III (WO05/093050); With Thermobifida fusca EGV (WO05/093050).
Can include but are not limited to for the example of fungi endoglucanase of the present invention trichoderma reesei endoglucanase I (Penttila etc., 1986, Gene45:253-263, Trichodermareesei Cel7B endoglucanase i (GENBANK tMaccession number M15665); Trichoderma reesei endoglucanase II (Saloheimo etc., 1988, Gene63:11-22), Trichodermareesei Cel5A EG II (GENBANK tMaccession number M19373); Trichoderma reesei endoglucanase III (Okada etc., 1988, Appl.Environ.Microbiol.64:555-563; GENBANK tMaccession number AB003694); Trichoderma reesei endoglucanase V (Saloheimo etc., 1994, Molecular Microbiology13:219-228; GENBANK tMaccession number Z33381); Microorganism Aspergillus aculeatus endoglucanase (Ooi etc., 1990, Nucleic Acids Research18:5884); Valley aspergillus (Aspergillus kawachii) endoglucanase (Sakamoto etc., 1995, Current Genetics27:435-439); Carrot soft rot Erwinia (Erwinia carotovara) endoglucanase (Saarilahti etc., 1990, Gene90:9-14); Point sickle spore endoglucanase (GENBANK tMaccession number L29381); Ash humicola lanuginosa thermoidea mutation endoglucanase (GENBANK tMaccession number AB003107); Melanocarpus albomyces endoglucanase (GENBANK tMaccession number MAL515703); Neuraspora crassa endoglucanase (GENBANK tMaccession number XM_324477); Humicola insolens EGV; Thermophilic fungus destroyed wire CBS117.65 endoglucanase; Basidiomycetes (basidiomycete) CBS495.95 endoglucanase; Basidiomycetes CBS494.95 endoglucanase; The mould NRRL8126CEL6B endoglucanase of autochthonal shuttle spore; The mould NRRL8126CEL6C endoglucanase of autochthonal shuttle spore; The mould NRRL8126CEL7C endoglucanase of autochthonal shuttle spore; The mould NRRL8126CEL7E endoglucanase of autochthonal shuttle spore; The mould NRRL8126CEL7F endoglucanase of autochthonal shuttle spore; Cladorrhinum foecundissimum ATCC62373CEL7A endoglucanase; And Li's Trichoderma strains No.VTT-D-80133 endoglucanase (GENBANK tMaccession number M15665).
The example that can be used for cellobiohydrolase of the present invention includes but are not limited to, microorganism Aspergillus aculeatus cellobiohydrolase II (WO2011/059740), chaetomium thermophilum (Chaetomium thermophilum) cellobiohydrolase I, chaetomium thermophilum cellobiohydrolase II, Humicola insolens cellobiohydrolase I, thermophilic fungus destroyed wire cellobiohydrolase II, (WO2009/042871), Thielavia hyrcanie cellobiohydrolase II (WO2010/141325), the mould cellobiohydrolase II of autochthonal shuttle spore (CEL6A, WO2006/074435), Trichodermareesei cellobiohydrolase I, Trichodermareesei cellobiohydrolase II, and the brown spore cup fungi cellobiohydrolase II (WO2010/057086) that becomes mildewed.
The example that can be used for beta-glucosidase enzyme of the present invention includes but are not limited to from microorganism Aspergillus aculeatus (Kawaguchi etc., 1996, Gene173:287-288), Aspergillus fumigatus (WO2005/047499), aspergillus niger (Dan etc., 2000, J.Biol.Chem.275:4973-4980), the become mildewed beta-glucosidase enzyme of cup fungi (WO2007/019442) of aspergillus oryzae (WO2002/095014), Brazilian mould IBT20888 (WO2007/019442 and WO2010/088387), autochthonal shuttle spore mould (WO2011/035029) and brown spore.
Described beta-glucosidase enzyme can be fusion rotein.In one aspect, described beta-glucosidase enzyme is WO aspergillus oryzae beta-glucosidase enzyme variant BG fusion rotein (WO2008/057637) or aspergillus oryzae beta-glucosidase enzyme fusion rotein (2008/057637).
Other available endoglucanase, cellobiohydrolase and beta-glucosidase enzyme are disclosed in and use according to Henrissat B., 1991, A classification of glycosyl hydrolases based on amino-acid sequence similarities, Biochem.J.280:309-316 and Henrissat B. and Bairoch A., 1996, Updating the sequence-based classification of glycosyl hydrolases, in many glycosyl hydrolase families of the classification of Biochem.J.316:695-696.
Other can be used for cellulolytic enzyme of the present invention and is described in WO98/13465, WO98/015619, WO98/015633, WO99/06574, WO99/10481, WO99/025847, WO99/031255, WO2002/101078, WO2003/027306, WO2003/052054, WO2003/052055, WO2003/052056, WO2003/052057, WO2003/052118, WO2004/016760, WO2004/043980, WO2004/048592, WO2005/001065, WO2005/028636, WO2005/093050, WO2005/093073, WO2006/074005, WO2006/117432, WO2007/071818, WO2007/071820, WO2008/008070, WO2008/008793, U.S. Patent No. 5, 457, 046, U.S. Patent No. 5, 648, 263 and U.S. Patent No. 5, 686, 593.
In technique of the present invention, can use anyly to there is the GH61 polypeptide of cellulolytic enhancing activity as the component of enzyme composition.
The example that can be used for the GH61 polypeptide with cellulolytic enhancing activity of technique of the present invention includes but not limited to from autochthonal shuttle spore mould (WO2005/074647, WO2008/148131 and WO2011/035027), the tangerine hot ascomycetes of orange (WO2005/074656 and WO2010/065830), Trichodermareesei (WO2007/089290), thermophilic fungus destroyed wire (WO2009/085935, WO2009/085859, WO2009/085864, WO2009/085868), the GH61 polypeptide of Aspergillus fumigatus (WO2010/138754), from having a liking for loose mould (WO2011/005867), thermophilic ascomycete bacterial classification (WO2011/039319), Penicillium bacterial classification (WO2011/041397), with crust thermophilic ascomycete (Thermoascus crustaceous) GH61 polypeptide (WO2011/041504).
In one aspect, described in there is cellulolytic enhancing activity GH61 polypeptide at the solubility activation divalent metal described in WO2008/151043, for example, under the existence of manganese or copper, use.
The GH61 polypeptide in yet another aspect, with cellulolytic enhancing activity uses under the existence of titanium dioxide compound, bicyclic compound, heterogeneous ring compound, nitrogenous compound, naphtoquinone compounds, sulfocompound or the liquor that obtains as pretreated maize straw (PCS) from pretreated cellulose materials.
Described titanium dioxide compound can comprise any suitable combination thing that contains two or more Sauerstoffatoms.In some respects, described titanium dioxide compound contains the aryl module (moiety) replacing as described herein.Described titanium dioxide compound can comprise one or more (for example several) hydroxyl and/or hydroxy derivatives, but also comprises the aryl module of the replacement that lacks hydroxyl and hydroxy derivatives.The non-limiting example of titanium dioxide compound comprises pyrocatechol or catechol; Coffic acid; PCA; The 4-tertiary butyl-5-methoxyl group-1,2-dihydroxy-benzene; Pyrogallol; Gallic acid; Methyl-Gallic Acid; 2,3,4-trihydroxybenzophenone; 2,6-syringol; Sinapinic acid; 3,5-resorcylic acid; 4-is chloro-1,2-dihydroxy-benzene; 4-nitro-1,2-dihydroxy-benzene; Tannic acid; Progallin A; Hydroxyethanoic acid methyl esters; Dihydroxyl fumaric acid; 2-butyne-Isosorbide-5-Nitrae-glycol; Croconic acid; 1,3-PD; Tartrate; 2,4-pentanediol; 3-oxyethyl group-1,2-PD; 2,4,4 '-trihydroxybenzophenone; Cis-2-butene-Isosorbide-5-Nitrae-glycol; Squaric acid; Otan; Acetyl acrolein (acrolein acetal); Methyl-4-HBA; 4-HBA; And methyl-3,5-dimethoxy-4 '-hydroxy-benzoic acid; Or their salt or solvate (solvate).
Described bicyclic compound can comprise any suitable replacement carbocyclic fused ring system as described herein.Described compound can comprise one or more (for example several) other ring, and unless otherwise specified, be not limited to concrete number of rings.In one aspect, described bicyclic compound is flavonoid.In yet another aspect, described bicyclic compound is the optional isoflavonoid (isoflavonoid) replacing.In yet another aspect, described bicyclic compound is the optional pattern replacing ion (flavylium ion), as the cyanidin(e) of optional replacement or the optional anthocyanogen replacing, or derivatives thereof.The non-limiting example of bicyclic compound comprises l-Epicatechol (epicatechin); Quercetin (quercetin); Myricetin (myricetin); Taxifolin (taxifolin); Kaempferol (kaempferol); Sang Su (morin); Acacetin (acacetin); Naringenin (naringenin); Isorhamnetin (isorhamnetin); Apigenin (apigenin); Anthocyanidin (cyanidin); Anthocyanin (cyanin); Kuromanin; Keracyanin (keracyanin); Or their salt or solvate.
Described heterogeneous ring compound can be any suitable compound, as described herein optional replace comprise heteroatomic aromatic ring or non-aromatic ring.In one aspect, described heterocycle is the compound of the Heterocyclylalkyl module that comprises optional replacement or the heteroaryl module optionally replacing.In yet another aspect, the Heterocyclylalkyl module of described optional replacement or the optional heteroaryl module replacing are the optional five-membered ring alkyl replacing or the optional quinary heteroaryl module replacing.In yet another aspect, the optional Heterocyclylalkyl replacing or the optional heteroaryl module replacing are the modules that is selected from following optional replacement: pyrazolyl, furyl, imidazolyl, isoxazolyl, oxadiazolyl, oxazolyl, pyrryl, pyridyl, pyrimidyl, pyridazinyl, thiazolyl, triazolyl, thienyl (thienyl), dihydro-thiophene-pyrazolyl (dihydrothieno-pyrazolyl), thianaphthenyl, carbazyl, benzimidazolyl-, benzothienyl (benzothienyl), benzofuryl, indyl, quinolyl, benzotriazole base, benzothiazolyl, benzoxazolyl (benzooxazolyl), benzimidazolyl-, isoquinolyl, pseudoindoyl, acridyl, benzoisoxazole base (benzoisazolyl), T10, pyrazinyl, tetrahydrofuran base, pyrrolinyl, pyrrolidyl, morpholinyl, indyl, diazacyclo heptantriene base (diazepinyl), nitrogen heterocyclic heptantriene base (azepinyl), thia cycloheptatriene base (thiepinyl), piperidyl and oxepin base (oxepinyl).The Heterocyclylalkyl module of described optional replacement or the optional heteroaryl module replacing are the optional furyls replacing in yet another aspect.The non-limiting example of heterogeneous ring compound comprises (1,2-dihydroxy ethyl)-3,4-dihydrofuran-2 (5H)-one; 4-hydroxy-5-methyl base-3-furanone; 5-hydroxyl-2 (5H)-furanone; [1,2-dihydroxy ethyl] furans-2,3,4 (5H)-triketones; Alpha-hydroxy-gamma-butyrolactone; Ribonic acid gamma lactone; Hexanal saccharic acid gamma lactone (aldohexuronicaldohexuronic acid γ-lactone); Glucopyrone; 4 hydroxy coumarin; Dihydrobenzofuranes; 5-(methylol) furfural; Furoin (furoin); 2 (5H)-furanones; 5,6-dihydro-2H-pyran-2-one; With 5,6-dihydro-4-hydroxyl-6-methyl-2H-pyran-2-one; Or their salt or solvate.
Described nitrogenous compound can be any suitable combination thing with one or more nitrogen-atoms.In one aspect, described nitrogenous compound comprises amine, imines, azanol or Nitrous Oxide (nitroxide) module.The non-limiting example of nitrogenous compound comprises acetoxime; Violuric acid; Pyridine-2-aldoxime; Ortho-Aminophenol; 1,2-phenylenediamine; 2,2,6,6-tetramethyl--piperidino oxygen (piperidinyloxy); 5,6,7,8-tetrahydrobiopterin; 6,7-dimethyl-5,6,7,8-tetrahydrochysene pterin; And maleinamic acid; Or their salt or solvate.
Described naphtoquinone compounds can be any described suitable compound that comprises quinone module herein.The non-limiting example of naphtoquinone compounds comprises Isosorbide-5-Nitrae-benzoquinones; 1,4-naphthoquinone; 2 hydroxy 1,4 naphthoquinone (lawsone); 2,3-dimethoxy-5-methyl isophthalic acid, 4-benzoquinones or ubiquinone 0; 2,3,5,6-tetramethyl--Isosorbide-5-Nitrae-benzoquinones or duroquinone; Isosorbide-5-Nitrae-dihydroxyanthraquinone; 3-hydroxyl-1-methyl-5,6-indoline diketone or carbazochrome; The 4-tertiary butyl-5-methoxyl group-1,2-benzoquinones; Pyrroloquinoline quinone (pyrroloquinoline quinone); Or their salt or solvate.
Described sulfocompound can be any suitable compound that comprises one or more sulphur atoms.In one aspect, described sulfocompound comprises and is selected from following module: thionyl, thioether, sulfinyl, sulphonyl, sulphonamide (sulfamide), sulphonamide (sulfonamide), sulfonic acid and sulphonate.The non-limiting example of sulfocompound comprises sulfur alcohol; 2-propylmercaptan; 2-propylene-1-mercaptan; Mistabrom; Benzenethiol; Benzene-1,2-bis-mercaptan; Halfcystine; Methionine(Met); Gsh; Gelucystine; Or their salt or solvate.
In one aspect, this kind of compound as above significant quantity to cellulose materials, in the molar ratio to cellulose sugar unit, is approximately 10 -6to approximately 10, for example approximately 10 -6to approximately 7.5, approximately 10 -6to approximately 5, approximately 10 -6to approximately 2.5, approximately 10 -6to approximately 1, approximately 10 -5to approximately 1, approximately 10 -5to approximately 10 -1, approximately 10 -4to approximately 10 -1, approximately 10 -3to approximately 10 -1, or approximately 10 -3to approximately 10 -2.In yet another aspect, the significant quantity of compound as above is extremely about 1M of approximately 0.1 μ M, and for example approximately 0.5 μ M is to about 0.75M, and approximately 0.75 μ M is to about 0.5M, approximately 1 μ M is to about 0.25M, approximately 1 μ M is to about 0.1M, and approximately 5 μ M are to about 50mM, and approximately 10 μ M are to about 25mM, approximately 50 μ M are to about 25mM, approximately 10 μ M are to about 10mM, and approximately 5 μ M are to about 5mM, or about 0.1mM is to about 1mM.
Term " liquor (liquor) " means under described in this article condition, by processing ligno-cellulose and/or the hemicellulosic materials in slurry, or its monose such as wood sugar, pectinose, seminose etc., the solution phase producing, be water, organic phase or its combination, and solubility inclusion.The liquor strengthening for the cellulose decomposition of GH61 polypeptide can pass through, optionally under the existence of for example acid of catalyzer, optional under the existence of organic solvent, and optional and process cellulose materials or hemicellulosic materials (or raw material) to the physical damage of described material is combined by applying heat and/or pressure, then solution is separated to produce with residual solid.This type of conditional decision the degree that the obtainable cellulose decomposition of the combination by liquor and GH61 polypeptide strengthens in the process by cellulase prepared product hydrolysis fiber cellulosic material.Described liquor can use standard method in this area as filtration, deposition or centrifugal from treated material separation.
In one aspect, described liquor is approximately 10 to cellulosic significant quantity -6to the every g Mierocrystalline cellulose of about 10g, for example approximately 10 -6to about 7.5g, approximately 10 -6to approximately 5, approximately 10 -6to about 2.5g, approximately 10 -6to about 1g, approximately 10 -5to about 1g, approximately 10 -5to approximately 10 -1g, approximately 10 -4to approximately 10 -1g, approximately 10 -3to approximately 10 -1g, or approximately 10 -3to approximately 10 -2the every g Mierocrystalline cellulose of g.
In one aspect, described one or more (for example several) hemicellulose lytic enzymes comprise commercial hemicellulose lytic enzyme prepared product.The example that is applicable to commercial hemicellulose lytic enzyme prepared product of the present invention comprises, for example SHEARZYME tM(Novozymes A/S), (Novozymes A/S), (Novozymes A/S), (Novozymes A/S), (Novozymes A/S), (Novozymes A/S), (Novozymes A/S), (Genencor), (Genencor), (Genencor), (AB Enzymes), HSP6000Xylanase (DSM), DEPOL tM333P (Biocatalysts Limit, Wales, UK), DEPOL tM740L (Biocatalysts Limit, Wales, UK) and DEPOL tM762P (Biocatalysts Limit, Wales, UK).
The example that can be used for the zytase of technique of the present invention includes but not limited to from microorganism Aspergillus aculeatus (Aspergillus aculeatus) (GeneSeqP:AAR63790; WO94/21785), Aspergillus fumigatus (Aspergillus fumigatus) (WO2006/078256), have a liking for the become mildewed zytase of cup fungi GH10 (WO2011/057083) of loose mould (WO2011/041405), Penicillium bacterial classification (WO2010/126772), mould (Thielavia terrestris) NRRL8126 of autochthonal shuttle spore (WO2009/079210) and brown spore.
The example that can be used for the xylobiase of technique of the present invention includes but not limited to the xylobiase from Neuraspora crassa (Neurospora crassa) (SwissProt accession number Q7SOW4), Trichodermareesei (Trichoderma reesei) (UniProtKB/TrEMBL accession number Q92458) and Ai Mosen ankle joint bacterium (Talaromyces emersonii) (SwissProt accession number Q8X212).
The example that can be used for the acetyl xylan esterase of technique of the present invention includes but not limited to from microorganism Aspergillus aculeatus (WO2010/108918), chaetomium globosum (Chaetomium globosum) (Uniprot accession number Q2GWX4), thin beautiful chaetomium (Chaetomium gracile) (GeneSeqP accession number AAB82124), Humicola insolens (Humicola insolens) DSM1800 (WO2009/073709), Hypocrea jecorina (Hypocrea jecorina) (WO2005/001036), thermophilic fungus destroyed wire (Wo2010/014880), Neuraspora crassa (UniProt accession number q7s259), the acetyl xylan esterase of grain husk withered septoria musiva (Phaeosphaeria nodorum) (Uniprot accession number Q0UHJ1) and the mould NRRL8126 of autochthonal shuttle spore (WO2009/042846).
The example that can be used for the feruloyl esterase of technique of the present invention includes but not limited to the feruloyl esterase from Humicola insolens DSM1800 (WO2009/076122), Fei Xixinsatuo bacterium (Neosartorya fischer) (UniProt accession number A1D9T4), Neuraspora crassa (UniProt accession number Q9HGR3), tangerine ash mould (WO2009/127729) and autochthonal shuttle spore mould (WO2010/053838 and WO2010/065448).
The example that can be used for the arabinofuranosidase of technique of the present invention includes but not limited to the arabinofuranosidase from aspergillus niger (Aspergillus niger) (GeneSeqP accession number AAR94170), Humicola insolens (Humicola insolens) DSM1800 (WO2006/114094 and WO2009/073383) and M.giganteus (WO2006/114094).
The example that can be used for the alpha-glucuronidase of the inventive method includes but not limited to from excellent aspergillus (Aspergillus clavatus) (UniProt accession number alcc12), Aspergillus fumigatus (SwissProt accession number Q4WW45), aspergillus niger (Uniprot accession number Q96WX9), terreus (Aspergillus terreus) (SwissProt accession number Q0CJP9), Humicola insolens (WO2010/014706), tangerine ash mould (WO2009/068565), the alpha-glucuronidase of Ai Mosen ankle joint bacterium (UniProt accession number Q8X211) and Trichodermareesei (Uniprot accession number Q99024).
The polypeptide with enzymic activity for technique of the present invention can be by the nutritional medium containing suitable Carbon and nitrogen sources and inorganic salt, use means known in the art (referring to, for example Bennett, and LaSure J.W., L. (volume), More Gene Manipulations in Fungi, Academic Press, CA, 1991) the above-mentioned microorganism strains of pointing out that ferments produces.Suitable substratum can obtain from supplier, or can for example, according to published composition preparation (catalogue of American type culture collection).Be suitable for temperature range and other conditions that growth and enzyme produce and in this area be known (referring to, for example Bailey, J.E. and Ollis, D.F., Biochemical Engineering Fundamentals, McGraw-Hill Book Company, NY, 1986).
Described fermentation can be the method for any culturing cell that causes enzyme or protein expression or separation.Therefore, fermentation can be understood as the shake-flask culture that is included in suitable substratum and carries out under the condition that allows described enzyme to be expressed or separate, or in laboratory or industrial fermentation tank little-or large scale fermentation (comprise continuously, in batches, fed-batch or solid state fermentation).The enzyme of the gained producing by aforesaid method can reclaim and pass through ordinary method purifying from fermention medium.
fermentation.Can for example, sugar directly or indirectly can be fermented into the fermentable sugars that the organism of fermentation fermentation of required tunning is hung oneself the cellulose materials of hydrolysis or obtained containing xylan material by one or more (several)." fermentation " or " fermentation process " refers to any fermentation process or any method that comprises fermentation step.Fermentation process also comprises for example, for example, fermentation process for consumer's goods alcohol industry (, beer and grape wine), Dairy industry (, fermented milk prod), leather industry and tobacco.Fermentation condition depends on tunning and the fermenting organism body of expectation, and can easily be determined by those skilled in the art.
In fermentation step, the sugar discharging from cellulose materials or containing xylan material as the result of pre-treatment and enzyme hydrolysis step, becomes product by fermenting organism body (as yeast) fermentation, for example, and ethanol.As described herein, hydrolysis (saccharification) and fermentation can be separately or simultaneously.
In enforcement fermentation step of the present invention, can use any suitable cellulose materials through hydrolysis or contain xylan material.Conventionally select described material according to required leavened prod (, the material that obtain from fermentation) and the method for use, as known in the art.
Term " fermention medium " can be regarded as in this article and refers to add organism of fermentation substratum before, as, the substratum being produced by saccharifying, and the substratum using in synchronous glycosylation and fermentation process (SSF).
" organism of fermentation " refers to be applicable to any microorganism of desirable fermentation process generation tunning, comprises bacterium and fungal organism.Fermenting organism body can be hexose and/or pentose fermentation organism, or their combination.Hexose and pentose fermentation organism are all known in this area.Suitable organism of fermentation sugar (as glucose, wood sugar, xylulose, pectinose, maltose, seminose, semi-lactosi and/or oligosaccharides) can ferment directly or indirectly (, conversion) become required leavened prod.Can produce the bacterium of ethanol and the example of fungi fermentation organism as Lin etc., described in 2006, Appl.Microbiol.Biotechnol.69:627-642.
The example of the organism of fermentation of energy zymohexose comprises bacterium and fungal organism, as yeast.Preferred yeast comprises mycocandida, genus kluyveromyces and yeast belong, for example bacterial strain of Candida sonorensis, kluyveromyces marxianus and yeast saccharomyces cerevisiae.
Example with the fermenting organism body of its native state energy ferment pentoses comprises bacterium and fungal organism, as some yeast.Preferred wood-sugar fermentation yeast comprises mycocandida, preferably shehatae candida (Candida sheatae) or Candida sonorensis; And Pichia, the preferably bacterial strain of pichia stipitis (Pichia stipitis), as the bacterial strain of pichia stipitis CBS5773.Preferred pentose fermentation yeast comprises pipe capsule yeast belong (Pachysolen), preferably the bacterial strain of pachysolen tannophilus (Pachysolen tannophilus).Can not ferment pentoses as the biology of wood sugar and pectinose can be by means known in the art genetic modification and ferment pentoses.
Can effectively hexose be become the bacterium of ethanol to comprise with pentose fermentation, for example, Bacillus coagulans (Bacillus coagulans), clostridium acetobutylicum (Clostridium acetobutylicum), thermal fiber clostridium (Clostridium thermocellum), Clostridium phytofermentans, ground bacillus belong to bacterial classification, separate sugared hot anaerobic bacillus(cillus anaerobicus) (Thermoanaerobacter saccharolyticum) and zymomonas mobilis (Zymomonas mobilis) (Philippidis, 1996, see above).
Other fermenting organism comprises bacillus, as Bacillus coagulans, mycocandida, as Candida sonorensis, C.methanosorbosa, Di Dansi candiyeast (Candida diddensii), Candida parapsilosis (Candida parapsilosis), C.naedodendra, C.blankii, C.entomophilia, rape candiyeast (C.brassicae), candida pseudotropicalis (Candida pseudotropicalis), Candida boidinii (Candida boidinii), Candida utilis (Candida utilis) and shehatae candida (C.scehatae), fusobacterium, as clostridium acetobutylicum, thermal fiber clostridium and C.phytofermentans, intestinal bacteria, the coli strain that particularly genetically modified promotion ethanol produces, ground bacillus belongs to bacterial classification, Hansenula, as Hansenula anomala (Hansenula anomala), Klebsiella (Klebsiella), as acid-producing Klebsiella bacterium (Klebsiella oxytoca), genus kluyveromyces, as kluyveromyces marxianus, Kluyveromyces lactis (K.lactis), K.thermotolerans and Kluyveromyces fragilis, Schizosaccharomyces, as schizosaccharomyces pombe (S.pombe), hot anaerobic bacillus(cillus anaerobicus) belongs to (Thermoanaerobacter), as separates sugared hot anaerobic bacillus(cillus anaerobicus), and zymomonas (Zymomonas), as the bacterial strain of zymomonas mobilis.
One preferred aspect, yeast be Brettanomyces belong to (Bretannomyces).One preferred aspect, yeast is Ke Laosen Brettanomyces (Bretannomyces clausenii).In another more preferred aspect, yeast is candiyeast.In another more preferred aspect, yeast is Candida sonorensis.In another more preferred aspect, yeast is Candida boidinii.In another more preferred aspect, yeast is Candida blankii.In another more preferred aspect, yeast is rape candiyeast.In another more preferred aspect, yeast is Di Dansi candiyeast.In another more preferred aspect, yeast is Candida entomophiliia.In another more preferred aspect, yeast is candida pseudotropicalis.In another more preferred aspect, yeast is shehatae candida.In another more preferred aspect, yeast is Candida utilis.Another preferred aspect, yeast is excellent spore yeast belong (Clavispora).In another more preferred aspect, yeast is Clavispora lusitaniae yeast (Clavispora lusitaniae).In another more preferred aspect, yeast is Root and stem of Cholla rod spore yeast (Clavispora opuntiae).Another preferred aspect, yeast is kluyveromyces.In another more preferred aspect, yeast is Kluyveromyces fragilis.In another more preferred aspect, yeast is kluyveromyces marxianus.In another more preferred aspect, yeast is Kluyveromyces thermotolerans.Another preferred aspect, yeast is pipe capsule yeast belong (Pachysolen).In another more preferred aspect, yeast is pachysolen tannophilus.Another preferred aspect, yeast is pichia spp.In another more preferred aspect, yeast is pichia stipitis.Another preferred aspect, yeast is yeast belong bacterial classification.Another preferred aspect, yeast is yeast saccharomyces cerevisiae.In another more preferred aspect, yeast is saccharomyces diastaticus (Saccharomyces distaticus).In another more preferred aspect, yeast is saccharomyces uvarum (Saccharomyces uvarum).
One preferred aspect, bacterium is bacillus.One preferred aspect, bacterium is Bacillus coagulans.In another more preferred aspect, bacterium is fusobacterium.In another more preferred aspect, bacterium is clostridium acetobutylicum.In another more preferred aspect, bacterium is Clostridium phytofermentans.In another more preferred aspect, bacterium is thermal fiber clostridium.In another more preferred aspect, bacterium is that ground bacillus belongs to bacterial classification.In another more preferred aspect, bacterium is that hot anaerobic bacillus(cillus anaerobicus) belongs to.In another more preferred aspect, bacterium is to separate sugared hot anaerobic bacillus(cillus anaerobicus).In another more preferred aspect, bacterium is zymomonas.In another more preferred aspect, bacterium is zymomonas mobilis.
The yeast that commercially available applicable ethanol produces comprises, for example BIOFERM tMaFT and XR (NABC-North American Bioproducts Corporation, GA, USA), ETHANOL RED tMyeast (Red Star/Lesaffre, USA), FALI tM(Fleischmann ' s Yeast, Burns Philp Food Inc., USA), FERMIOL tM(DSM Specialties), GERT STRAND tM(Gert Strand AB, Sweden) and SUPERSTART tMand THERMOSACC tMfresh yeast (Ethanol Technology, WI, USA).
One preferred aspect, thereby organism of fermentation provides the ability of ferment pentoses through genetic modification, as utilizes wood sugar, utilizes pectinose and jointly utilizes the microorganism of wood sugar and pectinose.
Organism (Chen and the Ho that hexose and pentose can be changed into ethanol (fermentation altogether) are built by heterologous gene being cloned into multiple organism of fermentation, 1993, Cloning and improving the expression of Pichia stipitis xylose reductase gene in Saccharomyces cerevisiae, Appl.Biochem.Biotechnol.39-40:135-147; Ho etc., 1998, Genetically engineered Saccharomyces yeast capable of effectively cofermenting glucose and xylose, Appl.Environ.Microbiol.64:1852-1859; Kotter and Ciriacy, 1993, Xylose fermentation by Saccharomyces cerevisiae, Appl.Microbiol.Biotechnol.38:776-783; Walfridsson etc., 1995, Xylose-metabolizing Saccharomyces cerevisiae strains overexpressing the TKL1and TAL1genes encoding the pentose phosphate pathway enzymes transketolase and transaldolase, Appl.Environ.Microbiol.61:4184-4190; Kuyper etc., 2004, Minimal metabolic engineering of Saccharomyces cerevisiae for efficient anaerobic xylose fermentation:a proof of principle, FEMS Yeast Research4:655-664; Beall etc., 1991, Parametric studies of ethanol production from xylose and other sugars by recombinant Escherichia coli, Biotech.Bioeng.38:296-303; Ingram etc., 1998, Metabolic engineering of bacteria for ethanol production, Biotechnol.Bioeng.58:204-214; Zhang etc., 1995, Metabolic engineering of a pentose metabolism pathway in ethanologenic Zymomonas mobilis, Science267:240-243; Deanda etc., 1996, Development of an arabinose-fermenting Zymomonas mobilis strain by metabolic pathway engineering, Appl.Environ.Microbiol.62:4465-4470; WO2003/062430, xylose isomerase).
One preferred aspect, be Candida sonorensi through the organism of fermentation of genetic modification.Another preferred aspect, be intestinal bacteria through the organism of fermentation of genetic modification.Another preferred aspect, be acid-producing Klebsiella bacterium through the organism of fermentation of genetic modification.Another preferred aspect, described genetically modified organism of fermentation is kluyveromyces marxianus.Another preferred aspect, described genetically modified organism of fermentation is yeast saccharomyces cerevisiae.Another preferred aspect, be zymomonas mobilis through the organism of fermentation of genetic modification.
As known in the art, above-mentioned organism can also be for generation of other material, as described herein.
Conventionally add organism of fermentation to the cellulose materials of degraded or containing xylan material or hydrolyzate, and carry out approximately 8 to approximately 96 hours, for example fermentation in approximately 24 to approximately 60 hours.Temperature is generally approximately 26 DEG C to approximately 60 DEG C, and for example approximately 32 DEG C or 50 DEG C, and for example, at extremely about pH8, about pH4-5,6 or 7 of about pH3.
In one aspect, use yeast and/or another kind of microorganism to the cellulose materials of degrading or containing xylan material, and carry out approximately 12 to approximately 96 hours, as be generally fermentation in 24-60 hour.In yet another aspect, temperature is preferably approximately 20 DEG C to approximately 60 DEG C, and for example approximately 25 DEG C to approximately 50 DEG C, and approximately 32 DEG C to approximately 50 DEG C, approximately 32 DEG C to approximately 50 DEG C, and pH is generally about pH3 to about pH7, for example extremely about pH7 of about pH4.But some fermenting organism styles, as bacterium, have the suitableeest higher leavening temperature.Yeast or another kind of microorganism are preferably with approximately 10 5-10 12, preferred approximately 10 7-10 10, particularly about 2x10 8the amount of the every ml fermented liquid of viable count is used.For example be found in " The Alcohol Textbook " (K.Jacques about the further guidance that uses yeast to ferment, T.P.Lyons and D.R.Kelsall compile, Nottingham University Press, United Kingdom1999), it is incorporated to herein by carrying stating.
Fermentation stimulating substance can use with any Combination of Methods as herein described, further to improve zymotechnique, particularly improves the performance of organism of fermentation, as, speed increases and alcohol getting rate." fermentation stimulating substance " refers to the stimulant for organism of fermentation (particularly yeast) growth.Preferably comprise VITAMIN and mineral substance for the fermentation stimulating substance of growing.The example of VITAMIN comprises multivitamin, vitamin H, pantothenic acid (salt), nicotinic acid, meso-inositol (meso-inositol), VitB1, pyridoxol (pyridoxine), para-amino benzoic acid, folic acid, riboflavin and vitamin A, B, C, D and E.Referring to, for example, Alfenore etc., Improving ethanol production and viability of Saccharomyces cerevisiae by a vitamin feeding strategy during fed-batch process, Springer-Verlag (2002), it is incorporated to herein by carrying stating.The example of mineral substance comprises can provide nutraceutical mineral substance and mineral salt, and described nutrition comprises P, K, Mg, S, Ca, Fe, Zn, Mn and Cu.
tunning: tunning can be any material that is derived from fermentation.Tunning can be to be not limited to alcohol (for example, arabitol, propyl carbinol, isopropylcarbinol, ethanol, glycerine, methyl alcohol, ethylene glycol, 1,3-PD (propylene glycol), butyleneglycol, glycerol, sorbyl alcohol and Xylitol); Alkane (for example pentane, hexane, heptane, octane, nonane, decane, undecane and dodecane); Naphthenic hydrocarbon (for example pentamethylene, hexanaphthene, suberane and cyclooctane); Alkene (for example amylene, hexene, heptene and octene); Amino acid (for example, aspartic acid, L-glutamic acid, glycine, Methionin, Serine and Threonine); Gas (for example, methane, hydrogen (H 2), carbonic acid gas (CO 2) and carbon monoxide (CO)); Isoprene; Ketone (for example, acetone); Organic acid (for example, acetic acid, acetonic acid, hexanodioic acid, xitix, citric acid, 2,5-diketone-D-glyconic acid, formic acid, FUMARIC ACID TECH GRADE, saccharic acid, glyconic acid, glucuronic acid, pentanedioic acid, 3-hydroxy-propionic acid, methylene-succinic acid, lactic acid, oxysuccinic acid, propanedioic acid, oxalic acid, oxaloacetic acid, propionic acid, succsinic acid and xylosic acid); And polyketide.Tunning can also be the protein as high-value product.
One preferred aspect, tunning is alcohol.Will be understood that, term " alcohol " comprises the material that comprises one or more oh groups.Aspect preferred, described alcohol is propyl carbinol.In another more preferred aspect, described alcohol is isopropylcarbinol.In another more preferred aspect, described alcohol is ethanol.In another more preferred aspect, described alcohol is methyl alcohol.In another more preferred aspect, described alcohol is arabitol.In another more preferred aspect, described alcohol is butyleneglycol.In another more preferred aspect, described alcohol is ethylene glycol.In another more preferred aspect, described alcohol is glycerol (glycerin).In another more preferred aspect, described alcohol is glycerine (glycerol).In another more preferred aspect, described alcohol is 1,3-PD.In another more preferred aspect, described alcohol is sorbyl alcohol.In another more preferred aspect, described alcohol is Xylitol.Referring to, for example, Gong, C.S., Cao, N.J., Du, J., and Tsao, G.T., 1999, Ethanol production from renewable resources, in Advances in Biochemical Engineering/Biotechnology, Scheper, T. compiles, Springer-Verlag Berlin Heidelberg, Germany, 65:207-241; Silveira, M.M., and Jonas, R., 2002, The biotechnological production of sorbitol, Appl.Microbiol.Biotechnol.59:400-408; Nigam, P. and Singh, D., 1995, Processes for fermentative production of xylitol – a sugar substitute, Process Biochemistry30 (2): 117-124; Ezeji, T.C., Qureshi, and Blaschek N., H.P., 2003, Production of acetone, butanol and ethanol by Clostridium beijerinckii BA101and in situ recovery by gas stripping, World Journal of Microbiology and Biotechnology19 (6): 595-603.
Another preferred aspect, described tunning is alkane.Described alkane is the alkane of branching or branching not.In another more preferred aspect, described alkane is pentane.In another more preferred aspect, described alkane is hexane.In another more preferred aspect, described alkane is heptane.In another more preferred aspect, described alkane is octane.In another more preferred aspect, described alkane is nonane.In another more preferred aspect, described alkane is decane.In another more preferred aspect, described alkane is undecane.In another more preferred aspect, described alkane is dodecane.
Another preferred aspect, described tunning is naphthenic hydrocarbon.In another more preferred aspect, described naphthenic hydrocarbon is pentamethylene.In another more preferred aspect, described naphthenic hydrocarbon is hexanaphthene.In another more preferred aspect, described naphthenic hydrocarbon is suberane.In another more preferred aspect, described naphthenic hydrocarbon is cyclooctane.
Another preferred aspect, described tunning is alkene.Described alkene can be the alkene of branching not or branching.In another more preferred aspect, described alkene is amylene.In another more preferred aspect, described alkene is hexene.In another more preferred aspect, described alkene is heptene.In another more preferred aspect, described alkene is octene.
Another preferred aspect, described tunning is amino acid.In another more preferred aspect, described organic acid is aspartic acid.In another more preferred aspect, described amino acid is L-glutamic acid.In another more preferred aspect, described amino acid is glycine.In another more preferred aspect, described amino acid is Methionin.In another more preferred aspect, described amino acid is Serine.In another more preferred aspect, described amino acid is Threonine.Referring to, for example, Richard, and Margaritis A., A., 2004, Empirical modeling of batch fermentation kinetics for poly (glutamic acid) production and other microbial biopolymers, Biotechnology and Bioengineering87 (4): 501-515.
Another preferred aspect, described material is gas.In another more preferred aspect, described gas is methane.In another more preferred aspect, described gas is H 2.In another more preferred aspect, described gas is CO 2.In another more preferred aspect, described gas is CO.Referring to, for example, Kataoka, N., A.Miya, and K.Kiriyama, 1997, Studies on hydrogen production by continuous culture system of hydrogen-producing anaerobic bacteria, Water Science and Technology36 (6-7): 41-47; And Gunaseelan, V.N., in Biomass and Bioenergy, Vol.13 (1-2), pp83-114,1997, Anaerobic digestion of biomass for methane production:A review.
Another preferred aspect, described tunning is isoprene.
Another preferred aspect, described tunning is ketone.It should be understood that term " ketone " contained the ketone that contains one or more ketone modules.In another more preferred aspect, described ketone is acetone.Referring to, for example Qureshi and Blaschek, 2003, see above.
Another preferred aspect, described tunning is organic acid.In another more preferred aspect, described organic acid is acetic acid.In another more preferred aspect, described organic acid is acetonic acid.In another more preferred aspect, described organic acid is hexanodioic acid.In another more preferred aspect, described organic acid is xitix.In another more preferred aspect, described organic acid is citric acid.In another more preferred aspect, described organic acid is 2,5-diketone-D-glyconic acid.In another more preferred aspect, described organic acid is formic acid.In another more preferred aspect, described organic acid is FUMARIC ACID TECH GRADE.In another more preferred aspect, described organic acid is saccharic acid.In another more preferred aspect, described organic acid is glyconic acid.In another more preferred aspect, described organic acid is glucuronic acid.In another more preferred aspect, described organic acid is pentanedioic acid.Another preferred aspect, described organic acid is 3-hydroxy-propionic acid.In another more preferred aspect, described organic acid is methylene-succinic acid.In another more preferred aspect, described organic acid is lactic acid.In another more preferred aspect, described organic acid is oxysuccinic acid.In another more preferred aspect, described organic acid is propanedioic acid.In another more preferred aspect, described organic acid is oxalic acid.In another more preferred aspect, described organic acid is propionic acid.In another more preferred aspect, described organic acid is succsinic acid.In another more preferred aspect, described organic acid is xylosic acid.Referring to, for example, Chen, R. and Lee, Y.Y., 1997, Membrane-mediated extractive fermentation for lactic acid production from cellulosic biomass, Appl.Biochem.Biotechnol.63-65:435-448.
Another preferred aspect, described material is polyketide.
reclaimcan use any method known in the art, optionally reclaim tunning from fermention medium, described method includes, but not limited to chromatography, electrophoresis method, differential solubleness, distillation or extraction.For example, by conventional distillating method from the cellulose materials of fermentation or containing xylan material separation purified alcohols.Can obtain the ethanol of purity up to about 96vol.%, it can be used as, for example, and alcohol fuel, drinking alcohol (, drinkable neutral alcoholic drinks), or industrial alcohol.
Signal peptide
The invention still further relates to the polynucleotide of the separation of coded signal peptide, described signal peptide comprises or consists of the amino acid/11 to 18 of SEQ ID NO:2, the amino acid/11 to 16 of SEQ ID NO:4, the amino acid/11 to 20 of SEQ ID NO:6, or the amino acid/11 to 21 of SEQ ID NO:8.Described polynucleotide can further comprise the gene of proteins encoded, and it is operably connected to signal peptide.Described albumen is preferably external source for described signal peptide.In one aspect, the encode polynucleotide of described signal peptide are the Nucleotide 1 to 54 of SEQ ID NO:1.In yet another aspect, the encode polynucleotide of described signal peptide are the Nucleotide 1 to 48 of SEQ ID NO:3.In yet another aspect, the encode polynucleotide of described signal peptide are the Nucleotide 1 to 60 of SEQ ID NO:5.In yet another aspect, the encode polynucleotide of described signal peptide are the Nucleotide 1 to 63 of SEQ ID NO:7.
The invention still further relates to the nucleic acid construct, expression vector and the recombinant host cell that comprise this kind of polynucleotide.
The invention still further relates to for generation of method of protein, comprising: the recombinant host cell of (a) cultivating the gene that comprises this kind of polynucleotide being operatively connected and encoding said proteins; Optionally (b) reclaims described protein.
Described protein can be natural or allos for host cell.Term " protein " does not refer to the coded product of length-specific in the meaning herein, and therefore contains peptide, oligopeptides and polypeptide.Term " protein " is also contained through combination to form the two or more polypeptide of coded product.Described protein also comprises hybrid polypeptide and fusion polypeptide.
Preferred protein is hormone, enzyme, acceptor or its part, antibody or its part, or reporter protein (reporter).For example, described protein can be lytic enzyme, isomerase, ligase enzyme, lyase (lyase), oxydo-reductase or transferring enzyme, for example alpha-galactosidase, alpha-glucosidase, aminopeptidase, amylase, beta-galactosidase enzymes, beta-glucosidase enzyme, xylobiase, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, at, Maltose 4-glucosyltransferase, deoxyribonuclease, endoglucanase, esterase, glucoamylase, saccharase, laccase, lipase, mannosidase, become glycanase (mutanase), oxydase, pectin decomposing enzyme, peroxidase, phytase, polyphenoloxidase, proteolytic ferment, rnase, trans-glutaminases, or zytase.
Gene can obtain from any protokaryon, eucaryon or other source.
By following examples, the present invention is further described, but should not be understood as limitation of the scope of the invention.
Embodiment
Bacterial strain
The fungal bacterial strain of called after NN051602 by 45 DEG C on PDA flat board dilution then separate from the compost sample of economizing from Chinese yunnan by shifting single conidium to purifying on YG agar plate.This bacterial strain NN051602 is Ai Mosen mould based on morphological specificity and ITS rDNA Sequence Identification.
The fungal bacterial strain of called after NN047338 by 45 DEG C on PDA flat board dilution then separate from the pedotheque of economizing from Hunan China by shifting single conidium to purifying on YG agar plate.This bacterial strain NN047338 is thermophilic capital spore based on morphological specificity and ITS rDNA Sequence Identification.
The fungi strain of called after NN051380 by 45 DEG C on PDA flat board dilution then separate from the pedotheque of collecting in China by shifting single conidium to purifying on YG agar plate.Bacterial strain NN051380 is penicillium oxalicum based on morphological specificity and ITS rDNA Sequence Identification.
Substratum
PDA flat board adds to 1 liter by the potato dextrose agar of 39 grams and deionized water and forms.
YG agar plate is by the yeast extract of 5g, the glucose of 10g, and the agar of 20g, and deionized water adds to 1 liter of formation.
YPG substratum is by the yeast extract of 0.4% in deionized water, 0.1% KH 2pO 4, 0.05% MgSO 47H 2o, and 1.5% glucose forms.
YPM substratum is by the yeast extract of 1% in deionized water, 2% peptone, and 2% maltose forms.
Czapek ' s substratum is by the sucrose of 30g, the NaNO of 3g 3, the MgSO of 0.5g 47H 2o, the FeSO of 0.01g 47H 2o, the K of 1g 2hPO 4, the KCl of 0.5g and deionized water add to 1 liter of formation.PH is adjusted to pH4 with 1M HCl.
Minimum medium flat board is by the sucrose of 342g, the salts solution of 20ml, and the agar of 20g, and deionized water adds to 1 liter of formation.Salts solution is by the 2.6%KCl in deionized water, 2.6%MgSO 47H 2o, 7.6%KH 2pO 4, 2ppm Na 2b 4o 710H 2o, 20ppm CuSO 45H 2o, 40ppm FeSO 47H 2o, 40ppm MnSO 42H 2o, 40ppm Na 2moO 42H 2o, and 400ppm ZnSO 47H 2o forms.
Embodiment 1: extracting genome DNA
Ai Mosen penicillium bacterial strain NN051602 is inoculated on PDA flat board and 45 DEG C of lucifuge incubations 3 days.Several mycelium-PDA bolt kinds are entered to contain to the 500ml shaking flask of the YPG substratum of 100ml.By bottle at 45 DEG C of incubations 3 days under 160rpm vibration.Mycelium by via (Calbiochem, La Jolla, CA, USA) filters and collects and freeze in liquid nitrogen.The mycelium freezing is milled to fine-powder by mortar and pestle, and uses Large-Scale Column Fungal DNAout (Baoman Biotechnology, Shanghai, China) according to manufacturer's instruction isolation of genomic DNA.
Thermophilic capital spore bacterial strain NN047338 is inoculated on PDA flat board and 45 DEG C of lucifuge incubations 3 days.Several mycelium-PDA bolt kinds are entered to contain to the 500ml shaking flask of the YPG substratum of 100ml.By bottle at 45 DEG C of incubations 3 days under 160rpm vibration.Mycelium is collected and is freezed in liquid nitrogen by filtering via MIRACLOTH.The mycelium freezing is milled to fine-powder by mortar and pestle, and uses plant Maxi Kit (QIAGEN GmbH, Hilden, Germany) follows manufacturer's instruction isolation of genomic DNA.
Penicillium oxalicum bacterial strain NN051380 is inoculated on PDA flat board and 25 DEG C of lucifuge incubations 5 days.Several mycelium-PDA bolt kinds are entered to contain to the 500ml shaking flask of Czapek ' the s substratum of 100ml.By bottle at 30 DEG C of incubations 3 days under 160rpm vibration.Mycelium by via filter and collect and freeze in liquid nitrogen.The mycelium freezing is milled to fine-powder by mortar and pestle, and uses plant Maxi Kit isolation of genomic DNA.
Embodiment 2: gene order-checking, compilation and the annotation of Ai Mosen mould NN051602, thermophilic capital spore NN047338 and penicillium oxalicum NN051380 genomic dna
The genome DNA sample of extraction is delivered to Beijing Genome Institute (BGI, Shenzhen, China) for use the gene order-checking of System (Illumina, Inc., San Diego, CA, USA).Skimming reading is taken to BHI uses SOAPdenovo program (Li etc., 2010, Genome Research20 (2): 265-72) to collect.Use standard biological Informatics Method to analyze for gene search (gene finding) and function prediction the sequence of compilation.Use GeneID (Parra etc., 2000, Genome Research10 (4): 511-515) to carry out predictive genes.Use Blastall version 2 .2.10 (Altschul etc., 1990, J.Mol.Biol.215 (3): 403-410, National Center for Biotechnology Information (NCBI), Bethesda, MD, and HMMER version 2 .1.1 (National Center for Biotechnology Information (NCBI) USA), Bethesda, MD, USA) based on structural homology forecast function.GH30 zytase goes out by the analysis Direct Identification of Blast result.Use Agene program (Munch and Krogh, 2006, BMC Bioinformatics7:263) and SignalP program (Nielsen etc., 1997, Protein Engineering10:1-6) qualification initiator codon.Further use SignalP program predicted signal peptide.Use iso-electric point and the molecular weight of the aminoacid sequence of Pepstats (Rice etc., 2000, Trends Genet.16 (6): 276-277) prediction derivation.
Embodiment 3: from genomic dna cloning Ai Mosen mould GH30 zytase encoding sequence
Gene information (SEQ ID NO:1) that gene order-checking based on from embodiment 2 obtains has designed the Oligonucleolide primers time showing with the genomic dna amplification GH30 xylanase gene PE04230001859 from Ai Mosen mould.Primer is by Invitrogen, Beijing, and China is synthetic.
Forward primer:
5’-ACACAACTGGGGATCCACCatgatctctctcctcgcgttgg-3’(SEQ?ID?NO:9)
Reverse primer:
5’-GTCACCCTCTAGATCTtgactggattgatccacttctgttctataca-3’(SEQ?ID?NO:10)
Lowercase represents the coding region of gene in forward primer, and in reverse primer, represents the flanking region of gene, and capitalization portion homologous is in the insertion point (WO2011/005867) of plasmid pPFJO355.
Above-mentioned each primer of 20 picomole is reacted for PCR, described reaction is by the Ai Mosen mould genomic dna of 2 μ l, 5X GC Buffer (the Finnzymes Oy of 10 μ l, Espoo, Finland), the DMSO of 1.5 μ l, dATP, dTTP, dGTP and the dCTP of each 2.5mM, and the PHUSION of 0.6 unit tMhigh-Fidelity DNA Polymerase (Finnzymes Oy, Espoo, Finland) forms, and final volume is 50 μ l.Amplification is used Peltier Thermal Cycler (MJ Research Inc., South San Francisco, CA, USA) carry out, its program is as follows: 98 DEG C of sex change 1 minute, and 8 circulations, each 98 DEG C of sex change 15 seconds, 65 DEG C of annealing 30 seconds, every circulation reduced by 1 DEG C, and extended 3.25 minutes at 72 DEG C; 22 circulations, eachly carry out 15 seconds at 98 DEG C, carry out 30 seconds, and 72 DEG C are carried out 3.25 minutes at 58 DEG C; And 72 DEG C of final extensions 10 minutes.Then heat block enters 4 DEG C of infusion.
PCR product is by using 90mM Tris-boric acid to separate with 1.0% agarose gel electrophoresis of 1mM EDTA (TBE) damping fluid, and wherein approximately 1.4kb product band cuts out from gel, and uses pCR DNA And Gel Band Purification Kit (GE Healthcare, Buckinghamshire, UK) is according to manufacturer's instruction purifying.
By Bam HI and Bgl II digestion for plasmid pPFJO355, separate by 1.0% agarose gel electrophoresis that uses tbe buffer liquid, and use ILLUSTRA tMgFX tMpCR DNA And Gel Band Purification Kit is according to manufacturer's instruction purifying.The carrier of PCR product and digestion is used cF Dry-down PCR Cloning Kit (Clontech Laboratories, Inc., Mountain View, CA, USA) link together, obtain plasmid pGH30_PE04230001859 (Fig. 1), wherein transcribing under the regulation and control in aspergillus oryzae alpha-amylase gene promotor of Ai Mosen mould GH30 zytase encoding sequence.In brief, by the pPFJO355 with Bam HI and Bgl II digestion of 30ng, and the Ai Mosen mould GH30 xylanase gene PCR product of the purifying of 60ng is added into reaction bottle, and is resuspended in the final volume of 10 μ l by adding deionized water.To react 37 DEG C of incubations 15 minutes then 50 DEG C of incubations 15 minutes.Use the reaction solution of three μ l to transform intestinal bacteria TOP10 competent cells (TIANGEN Biotech (Beijing) Co.Ltd., Beijing, China).The intestinal bacteria transformant that contains pGH30_PE04230001859 detects by bacterium colony PCR.Bacterium colony PCR is the method for inserting from intestinal bacteria bacterium colony rapid screening plasmid for directly.In brief, the premixed PCR solution aliquots containig in each PCR pipe (comprises PCR damping fluid, MgCl 2, dNTP, and generate the primer pair of PCR fragment by it) in, by moving the sharp picking of liquid and the described liquid point that moves rotated and adds single bacterium colony in reaction soln with sterilizing.Conventionally screened 7-10 bacterium colony.After PCR, reaction is analyzed by 1.0% agarose gel electrophoresis with tbe buffer liquid.Use spin Miniprep Kit (QIAGEN GmbH, Hilden, Germany) prepares plasmid DNA from the bacterium colony that shows the big or small inset with expectation.The Ai Mosen mould GH30 zytase encoding sequence inserting in pGH30_PE04230001859 is confirmed by the DNA sequencing that uses 3730XL DNA Analyzer (Applied Biosystems Inc., Foster City, CA, USA).
Embodiment 4: from the thermophilic capital spore of genomic dna cloning GH30 zytase encoding sequence
DNA information (SEQ ID NO:3) that gene order-checking based on from embodiment 2 obtains, has designed the Oligonucleolide primers time showing with the genomic dna amplification GH30 xylanase gene GH30_ZY577259_44 from thermophilic capital spore NN047338.Primer is by Invitrogen, Beijing, and China is synthetic.
Forward primer:
5’-ACACAACTGGGGATCCACCatgcgcacactctcaacgttg-3’(SEQ?ID?NO:11)
Reverse primer:
5’-GTCACCCTCTAGATCTaccgcattcggaatacgtagcttc-3’(SEQ?ID?NO:12)
Lowercase represents the coding region of gene in forward primer, and in reverse primer, represents the flanking region of gene, and capitalization portion homologous is in the insertion point of plasmid pPFJO355.
By the primer pair of 20 picomole, for PCR reaction, described reaction is by the thermophilic capital spore NN047338 genomic dna of 2 μ l, the 5X GC Buffer of 10 μ l, the DMSO of 1.5 μ l, dATP, dTTP, dGTP and the dCTP of each 2.5mM, and the PHUSION of 0.6 unit tMhigh-Fidelity DNA Polymerase forms, and final volume is 50 μ l.Amplification is used Peltier Thermal Cycler to carry out, and its program is as follows: 98 DEG C of sex change 1 minute, and 6 circulations, each 98 DEG C of sex change 15 seconds, 65 DEG C of annealing 30 seconds, every circulation reduced by 1 DEG C, and extended 1.5 minutes at 72 DEG C; 23 circulations, eachly carry out 15 seconds at 94 DEG C, carry out 30 seconds, and 72 DEG C are carried out 1.5 minutes at 63 DEG C; And 72 DEG C of final extensions 5 minutes.Then heat block enters 4 DEG C of infusion.
PCR product separates by 1.0% agarose gel electrophoresis that uses tbe buffer liquid, and wherein approximately the single product band of 1.5kb develops under UV light.Then PCR product is by using pCR DNA And Gel Band Purification Kit according to manufacturer's instruction from solution purification.
By Bam HI and Bgl II digestion for plasmid pPFJO355, separate by 1.0% agarose gel electrophoresis that uses tbe buffer liquid, and use ILLUSTRA tMgFX tMpCR DNA And Gel Band Purification Kit is according to manufacturer's instruction purifying.
The carrier of PCR product and digestion is used cF Dry-down PCR Cloning Kit links together, and obtains plasmid pGH30_ZY577259_44 (Fig. 2), wherein transcribing under the regulation and control in aspergillus oryzae alpha-amylase gene promotor of thermophilic capital spore GH30 zytase encoding sequence.In brief, by the pPFJO355 with Bam HI and Bgl II digestion of 30ng, and the thermophilic capital spore GH30 zytase PCR product of the purifying of 60ng is added into reaction bottle, and is resuspended in the final volume of 10 μ l by adding deionized water.To react 37 DEG C of incubations 15 minutes then 50 DEG C of incubations 15 minutes.Use the reaction solution of three μ l to transform intestinal bacteria TOP10 competent cell.The intestinal bacteria transformant that contains expression construct detects by bacterium colony PCR as described in example 3 above.Use spin Miniprep Kit prepares plasmid DNA from the bacterium colony that shows the big or small inset with expectation.The thermophilic capital spore GH30 zytase encoding sequence inserting in pGH30_ZY577259_44 is by confirming with the DNA sequencing of 3730XL DNA Analyzer.
Embodiment 5: from genomic dna cloning penicillium oxalicum GH30 zytase encoding sequence
DNA information (SEQ ID NO:5 and SEQ ID NO:7) that gene order-checking based on from embodiment 2 obtains has designed the Oligonucleolide primers time showing with two GH30 xylanase gene GH5_ZY569164_12 of genomic dna amplification and GH5_ZY569165_85 from penicillium oxalicum NN051380.Primer is by Invitrogen, Beijing, and China is synthetic.
SEQ ID5_ forward primer:
5’-ACACAACTGGGGATCCACCatgcgtctcacgagaaccacta-3’(SEQ?ID?NO:13)
SEQ ID5_ reverse primer:
5’-GTCACCCTCTAGATCTgacgttgacatggttccgaaga-3’(SEQ?ID?NO:14)
SEQ ID7_ forward primer:
5’-ACACAACTGGGGATCCACCatgaggacttcatcaacataccagg-3’(SEQ?ID?NO:15)
SEQ ID7_ reverse primer:
5’-GTCACCCTCTAGATCTagtccggcactgtctgagattc-3’(SEQ?ID?NO:16)
Lowercase represents the coding region of gene in forward primer, and in reverse primer, represents the flanking region of gene, and capitalization portion homologous is in the insertion point of plasmid pPFJO355.
By above-mentioned each primer of 20 picomole, for PCR reaction, described reaction is by the penicillium oxalicum genomic dna of 2 μ l, the 5X GC Buffer of 10 μ l, the DMSO of 1.5 μ l, dATP, dTTP, dGTP and the dCTP of each 2.5mM, and the PHUSION of 0.6 unit tMhigh-Fidelity DNA Polymerase forms, and final volume is 50 μ l.Amplification is used Peltier Thermal Cycler to carry out, and its program is as follows: 98 DEG C of sex change 1 minute, and 6 circulations, each 98 DEG C of sex change 15 seconds, 65 DEG C of annealing 30 seconds, every circulation reduced by 1 DEG C, and extended 70 seconds at 72 DEG C; 25 circulations, eachly carry out 15 seconds at 98 DEG C, carry out 30 seconds, and 72 DEG C are carried out 70 seconds at 62 DEG C; And 72 DEG C of final extensions 5 minutes.Then heat block enters 4 DEG C of infusion.
PCR product separates by 1.0% agarose gel electrophoresis that uses tbe buffer liquid, and the product band (table 1) of the expection size of wherein reacting from each PCR develops under UV light.Then PCR product is by using pCR DNA And Gel Band Purification Kit according to manufacturer's instruction from solution purification.
The size of table 1:PCR product
Gene title PCR product size
GH5_ZY569164_12 2.0kb
GH5_ZY569165_85 1.7kb
By Bam HI and Bgl II digestion for plasmid pPFJO355, separate by 1.0% agarose gel electrophoresis that uses tbe buffer liquid, and use ILLUSTRA tMgFX tMpCR DNA And Gel Band Purification Kit is according to manufacturer's instruction purifying.
Table 2: plasmid
Gene title Plasmid DNA collection of illustrative plates
GH5_ZY569164_12 pGH5_ZY569164_12 Fig. 3
GH5_ZY569165_85 pGH5_ZY569165_85 Fig. 4
The carrier of PCR product and digestion is used cF Dry-down PCR Cloning Kit links together, obtain plasmid (table 2) pGH5_ZY569164_12 (Fig. 3) and pGH5_ZY569165_85 (Fig. 4), wherein transcribing under the regulation and control in aspergillus oryzae alpha-amylase gene promotor of penicillium oxalicum GH30 zytase encoding sequence.In brief, by the pPFJO355 with Bam HI and Bgl II digestion of 30ng, and the penicillium oxalicum GH30 zytase PCR product of the purifying of 60ng is added into reaction bottle, and is resuspended in the final volume of 10 μ l by adding deionized water.To react 37 DEG C of incubations 15 minutes then 50 DEG C of incubations 15 minutes.Use the reaction solution of three μ l to transform intestinal bacteria TOP10 competent cell.The intestinal bacteria transformant that contains expression construct detects by bacterium colony PCR as described in example 3 above.Use spin Miniprep Kit prepares plasmid DNA from the bacterium colony that shows the big or small inset with expectation.The penicillium oxalicum GH30 zytase encoding sequence inserting in pGH5_ZY569164_12 and pGH5_ZY569165_85 is by confirming with the DNA sequencing of 3730XL DNA Analyzer.
Embodiment 6: express Ai Mosen mould GH30 zytase encoding sequence in aspergillus oryzae
Aspergillus oryzae HowB101 (WO9535385 embodiment 1) protoplastis is according to Christensen etc., and the method preparation of 1988, Bio/Technology6:1419-1422, with the pGH30_PE04230001859 conversion of 3 μ g.Transform and produce approximately 50 transformant.Four transformant are separated to independent minimum medium flat board.
These four transformant are inoculated respectively to the YPM substratum of the 3ml in 24 orifice plates, and at 30 DEG C of incubations under 150rpm stirs.After incubation on the 3rd, the supernatant of the 20 μ l from each cultivation is contained to 50mM2-(N-morpholino) ethyl sulfonic acid (MES) by use the SDS-PAGE of 4-12%Bis-Tris Gel (Invitrogen Corporation, Carlsbad, CA, USA) analyzes according to manufacturer's instruction.By the gel INSTANTBLUE of gained tM(Expedeon Ltd., Babraham Cambridge, UK) dyeing.The SDS-PAGE general picture of culture shows that all transformant have the band at about 70kDa.Select a transformant as expressing strain, and called after aspergillus oryzae O7MRC.
Embodiment 7: express thermophilic capital spore GH30 zytase encoding sequence in aspergillus oryzae
Aspergillus oryzae HowB101 protoplastis is according to Christensen etc., and 1988, the method preparation seeing above, with the pGH30_ZY577259_44 conversion of 3 μ g.Each conversion produces approximately 50 transformant.Eight transformant are separated to independent minimum medium flat board.
These four transformant are inoculated respectively to the YPM substratum of the 3ml in 24 orifice plates, and at 30 DEG C of incubations under 150rpm stirs.After incubation on the 3rd, the supernatant of the 20 μ l from each cultivation is contained to 50MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel analyzes according to manufacturer's instruction.By the gel INSTANTBLUE of gained tMdyeing.The SDS-PAGE general picture of culture shows that a transformant shows the expression with 60kDa protein band.Select a transformant as expressing strain, and called after aspergillus oryzae O6QYS.
Embodiment 8: express penicillium oxalicum GH30 zytase encoding sequence in aspergillus oryzae
Aspergillus oryzae HowB101 protoplastis is according to Christensen etc., and 1988, the method preparation seeing above, with pGH5_ZY569164_12 or the pGH5_ZY569165_85 conversion of 3 μ g.Transform and produce approximately 50 transformant.Eight transformant from each conversion are separated to independent minimum medium flat board.
These four transformant are inoculated respectively to the YPM substratum of the 3ml in 24 orifice plates, and at 30 DEG C of incubations under 150rpm stirs.After incubation on the 3rd, the supernatant of the 20 μ l from each cultivation is contained to 50MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel analyzes according to manufacturer's instruction.By the gel INSTANTBLUE of gained tMdyeing.Two encoding sequences of SDS-PAGE general picture demonstration of culture are all expressed, and have the protein band of 52kDa, and have the protein band (table 3) of 55kDa for pGH5_ZY569165_85 for pGH5_ZY569164_12.Select a transformant as expressing strain from each conversion, and name as shown in the second hurdle of table 3.
Table 3: express
Plasmid Express strain Recombinant protein size (kDa)
pGH5_ZY569164_12 O4S66 52
pGH5_ZY569165_85 O4S5Z 55
Embodiment 9: Ai Mosen mould GH30 zytase is expressed the fermentation of strain
YPM substratum washing by the inclined-plane of aspergillus oryzae O7MRC with 10ml, and inoculate 2 liters of flasks into the YPM substratum of six each 400ml of containing.Bottle is carried out to incubation at 30 DEG C under 80rpm vibration.Culture was gathered in the crops on 3rd, and used 0.45 μ m membrane (Millipore, Bedford, MA, USA) filters.
Embodiment 10: thermophilic capital spore GH30 zytase is expressed the fermentation of strain
YPM substratum washing by the inclined-plane of aspergillus oryzae O6QYS with 10ml, and inoculate 2 liters of flasks into a YPM substratum that contains 400ml.Bottle is carried out to incubation at 30 DEG C under 80rpm vibration.Culture was gathered in the crops on 3rd, and used 0.45 μ m membrane filters.
Embodiment 11: penicillium oxalicum GH30 zytase is expressed the fermentation of strain
By each expression strain, the YPM substratum washing of 10ml for the inclined-plane of aspergillus oryzae O4S66 or O4S5Z (embodiment 7), and inoculate 2 liters of flasks into the YPM substratum of 4-6 each 400ml of containing.Bottle is carried out to incubation at 30 DEG C under 80rpm vibration.Culture was gathered in the crops on 3rd, and used 0.45 μ m membrane filters.The final volume of each expression strain is shown in table 4.
Table 4: fermentation
Express strain Volume of culture (ml)
O4S66 1600
O4S5Z 2400
Embodiment 12: from the thermophilic capital spore of aspergillus oryzae O6QYS purification of Recombinant GH30 zytase
By filtered the aspergillus oryzae O6QYS of 400ml volume (embodiment 10) ammonium sulfate (80% is saturated) precipitation for supernatant, and be again dissolved in 50ml20mM Tris-HCl pH7.0, for same buffer dialysis, and filter through 0.45 μ m filter.Final volume is 80ml.Solution is imposed on to the 40ml Q by 20mM Tris-HCl pH7.0 balance fast Flow post (GE Healthcare, Buckinghamshire, UK).By linear 0-0.25M NaCl gradient elution for albumen.Collect and be not incorporated into the fraction of post, and have 50mM MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel assesses.By the gel INSTANTBLUE of gained tMdyeing.The fraction of the band that contains about 60kDa is collected.Then the solution collecting concentrates by ultrafiltration.
Embodiment 13: from aspergillus oryzae O4S5Z and O4S66 purification of Recombinant GH30 zytase
By filtered the aspergillus oryzae O4S5Z of 2400ml volume (embodiment 11) ammonium sulfate (80% is saturated) precipitation for supernatant, and be again dissolved in the 20mM Tris-HCl pH6.5 of 50ml, for same buffer dialysis, and filter through 0.45 μ m filter.Final volume is 80ml.Solution is imposed on to the 40ml Q by 20mM Tris-HCl pH6.5 balance fast Flow post (GE Healthcare, Buckinghamshire, UK).By linear 0-0.5M NaCl gradient elution for albumen.Collect the fraction with 0-0.1M NaCl wash-out, and use has linear 1.2-0M (NH 4) 2sO 4the 40ml Phenyl of gradient 6Fast Flow post (GE Healthcare, Buckinghamshire, UK) is further purified.Have 50mM MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel analyzes fraction.By the gel INSTANTBLUE of gained tMdyeing.The fraction of the band that contains about 52kDa is collected.Then the fraction of collecting concentrates by ultrafiltration.
By filtered the aspergillus oryzae O4S66 of 1600ml volume (embodiment 9) ammonium sulfate (80% is saturated) precipitation for supernatant, and be again dissolved in the 20mM Tris-HCl pH7.0 of 50ml, for same buffer dialysis, and filter through 0.45 μ m filter.Final volume is 80ml.Solution is imposed on to the 40ml Q by 20mMTris-HCl pH7.0 balance fast Flow post.By linear 0-0.5M NaCl gradient elution for albumen.Collect and be not incorporated into the fraction of post, and have 50mM MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel analyzes.By the gel INSTANTBLUE of gained tMdyeing.Collect the fraction of the band that contains about 55kDa and concentrate by ultrafiltration.
Embodiment 14: from aspergillus oryzae strain O7MRC purification of Recombinant GH30 zytase
By filtered the aspergillus oryzae O7MRC of 2400ml volume ammonium sulfate (80% is saturated) precipitation for supernatant, and be again dissolved in the 20mM Tris-HCl pH6.0 of 50ml, for same buffer dialysis, and filter through 0.45 μ m filter.Final volume is 80ml.Solution is imposed on to the 40ml Q of balance in 20mM Tris-HCl pH6.0 fast Flow post.By linear 0-0.5M NaCl gradient elution for albumen.Collect and be not incorporated into the fraction of post, and have 50mM MES's by use the SDS-PAGE of 4-12%Bis-Tris Gel analyzes.Collect the fraction of the band that contains about 70kDa and concentrate by ultrafiltration.
Embodiment 15: the sign of the genomic dna of coding GH30 zytase
The genomic dna sequence of Ai Mosen mould GH30 zytase encoding sequence and the aminoacid sequence of derivation are shown in SEQ ID NO:1 (D82SK3) and SEQ ID NO:2 (P24HGN).Encoding sequence is 1428bp, comprises terminator codon, and it is not interrupted by any intron.The albumen of the prediction of coding is 475 amino acid.Use SignalP program (Nielsen etc., 1997, Protein Engineering10:1-6), predicted the signal peptide of 18 residues.The maturation protein of prediction contains 457 amino acid, has the molecular weight of the prediction of 49.60kDa, and the iso-electric point of 4.95 prediction.
Use Needleman and Wunsch algorithm (Needleman and Wunsch, 1970, J.Mol.Biol.48:443-453) extend with the open point penalty of 10 breach, 0.5 breach that point penalty and EBLOSUM62 matrix determined aminoacid sequence comparative by overall comparison.The aminoacid sequence of the derivation of the Ai Mosen mould genomic dna of comparison code displaying GH30 zytase has 59.5% sequence identity (eliminating breach) with the aminoacid sequence (GENESEQP AZG45553) of the derivation of the GH30 zytase from wheel branch sickle spore (Fusarium verticillioides).
The genomic dna sequence of thermophilic capital spore GH30 zytase encoding sequence and the aminoacid sequence of derivation are shown in SEQ ID NO:3 (D82MAM) and SEQ ID NO:4 (P24EKK).Encoding sequence is 1515bp, comprises terminator codon, and its intron by 81bp (Nucleotide 422 to 502) interrupts.The albumen of the prediction of coding is 477 amino acid.Use SignalP program (Nielsen etc., 1997, see above), predicted the signal peptide of 16 residues.The maturation protein of prediction contains 461 amino acid, has the molecular weight of prediction and the iso-electric point of 8.64 prediction of 49.38kDa.
What use that Needleman and Wunsch algorithm (Needleman and Wunsch, 1970, see above) the open point penalty of breach with 10,0.5 breach extend that point penalty and EBLOSUM62 matrix determined aminoacid sequence is comparative by overall comparison.The aminoacid sequence of the derivation of the thermophilic capital spore genomic dna of comparison code displaying GH30 zytase has 46.15% identity (eliminating breach) with the aminoacid sequence (GENESEQP AZG45553) of the derivation of the GH30 zytase from wheel branch sickle spore.
The genomic dna sequence of penicillium oxalicum GH30 zytase encoding sequence and the aminoacid sequence of derivation are shown in SEQ ID NO:5 (D72UEK) and SEQ ID NO:6 (P241M1).Encoding sequence is 1915bp, comprise terminator codon, it is by 107bp (Nucleotide 337 to 443), 65bp (Nucleotide 540 to 604), 58bp (Nucleotide 763 to 820), and four introns of 95bp (Nucleotide 1213 to 1307) interrupt.The albumen of the prediction of coding is 529 amino acid.Use SignalP program (Nielsen etc., 1997, see above), predicted the signal peptide of 20 residues.The maturation protein of prediction contains 509 amino acid, has the molecular weight of prediction and the iso-electric point of 5.36 prediction of 53.33kDa.Compare by the subfamily module subsequence that the aminoacid sequence of full length protein is used to BLAST and all CAZY definition, the position of wherein predicting zytase catalysis and CBM territory with single comparison the most significantly in subfamily, dopes zytase catalytic domain and CBM territory and is respectively amino acid 21 to 366 and amino acid 494 to 529.
What use that Needleman and Wunsch algorithm (Needleman and Wunsch, 1970, see above) the open point penalty of breach with 10,0.5 breach extend that point penalty and EBLOSUM62 matrix determined aminoacid sequence is comparative by overall comparison.The aminoacid sequence of the derivation of the penicillium oxalicum genomic dna of comparison code displaying GH30 zytase has 44.68% identity (eliminating breach) with the aminoacid sequence (GENESEQP AZJ58747) of the derivation of the Fv30B albumen from wheel branch sickle spore.
The genomic dna sequence of penicillium oxalicum GH30 zytase encoding sequence and the aminoacid sequence of derivation are shown in SEQ ID NO:7 (D72UEJ) and SEQ ID NO:8 (P241KZ).Encoding sequence is 1629bp, comprises terminator codon, and it is by 87bp (Nucleotide 474 to 560), and four introns of 99bp (Nucleotide 708 to 806) interrupt.The albumen of the prediction of coding is 480 amino acid.Use SignalP program (Nielsen etc., 1997, see above), predicted the signal peptide of 21 residues.The maturation protein of prediction contains 459 amino acid, has the molecular weight of prediction and the iso-electric point of 5.19 prediction of 50.25kDa.
What use that Needleman and Wunsch algorithm (Needleman and Wunsch, 1970, see above) the open point penalty of breach with 10,0.5 breach extend that point penalty and EBLOSUM62 matrix determined aminoacid sequence is comparative by overall comparison.The aminoacid sequence of the derivation of the penicillium oxalicum genomic dna of comparison code displaying GH30 zytase has 44.72% identity (eliminating breach) with the aminoacid sequence (GENESEQP AZJ58747) of the derivation of the Fv30B albumen from wheel branch sickle spore.
Embodiment 17: the measurement of xylanase activity
Xylanase activity uses AZCL-xylan (Megazyme, Bray, Ireland) to measure as substrate.0.2%AZCL-xylan suspension passes through gently to stir and add 0.01% in 20mM sodium acetate pH5.0 damping fluid prepare.Then the 0.2%AZCL-xylan suspension of 100 μ l is mixed in titer plate with the zytase sample of 20 μ l, and be placed on ice before reaction.Measure by titer plate is transferred to hot mixed instrument comes initial, and described hot mixed instrument is set to the temperature of 50 DEG C.By flat board on hot mixed instrument at 700rpm incubation 15-30 minute.Reaction stops by flat board is transferred back to ice bath.Then by flat board in ice-cold whizzer with 1000xg centrifugal several minutes, and the supernatant of 100 μ l is transferred to titer plate.Read in absorbancy the measuring as xylanase activity of 595nm.Institute responds and carries out the same form three times, also carries out the damping fluid contrast without zytase.
The zytase of the purifying to aspergillus oryzae expression strain O4S66 and O6QYS is measured xylanase activity as mentioned above.Result is as follows.
Albumen OD 595
Contrast 0.1296
O4S66 1.2308
O6QYS 0.257
The zytase of expressing the purifying of strain O4S5Z from aspergillus oryzae uses wheat araboxylan (Megazyme, Bray, Ireland) to determine as substrate.Prepare the liquid storage of wheat araboxylan, contain 0.01% by every liter of 2g wheat araboxylan 50mM sodium acetate pH5.0 mix.Add the zytase of 10 μ l purifying to the wheat araboxylan liquid storage of 190 μ l.Substrate contrast and enzyme contrast are comprised.To react 50 DEG C of incubations 30 minutes, the 0.5M NaOH that then adds 50 μ l carrys out termination reaction.The reducing sugar producing uses as follows P-hydroxybenzoic acid hydrazides (PHBAH, Sigma Chemical Co., St.Louis, MO, the USA) assay method of adjusting in 96 hole titer plate forms to determine.In brief, 100 μ l aliquots containigs of suitable dilute sample are placed at the bottom of 96 hole cones in titer plate.Reaction comes initial by 1.5% in the 2%NaOH of 50 μ l (w/v) PHBAH being made an addition to each hole.Flat board is not heated 10 minutes at 95 DEG C with adding a cover, then allow to be cooled to room temperature, then 50 μ l distilled water are added into each hole.The 100 μ l aliquots containigs from each hole are transferred to flat 96 orifice plates, and use in the absorbancy of 410nm microplate Reader (Molecular Devices, Sunnyvale, CA, USA) measures.Use glucose standard specimen (being diluted to 0.1-0.0125mg/ml with 0.4% sodium hydroxide) to carry out preparation standard curve with by the A of acquisition 410nmvalue is scaled glucose equivalent.Use the reducing sugar producing to calculate the activity of zytase.
Albumen OD 410
O4S5Z 0.3094
Further describe the present invention by following numbering paragraph:
[1] have the isolated polypeptide of xylanase activity, it is selected from lower group:
(a) polypeptide, itself and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 has at least 60% sequence identity;
(b) polypeptide, it is by polynucleotide encoding, described polynucleotide are hybridized with following under at least medium-Gao stringent condition: (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (ii) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, or (iii) (i) or total length complement (ii);
(c) polypeptide, it is by polynucleotide encoding, described polynucleotide and SEQ ID NO:1, SEQ ID NO:3 or its cDNA sequence, SEQ ID NO:5 or its cDNA sequence, or the mature polypeptide encoded sequence of SEQ ID NO:7 or its cDNA sequence has at least 60% sequence identity;
(d) SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 for example, comprises the variant of replacement, disappearance and/or insertion in one or more (several) position; With
(e) (a), (b), (c) or polypeptide (d) have the fragment of xylanase activity.
[2] section 1 polypeptide, itself and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 has at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.
[3] polypeptide of section 1, it is by polynucleotide encoding, described polynucleotide are hybridized with following under medium-Gao, height or very high stringent condition: (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (ii) SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, or (iii) (i) or total length complement (ii).
[4] polypeptide of section 1, it is by polynucleotide encoding, described polynucleotide and SEQ ID NO:1, SEQ ID NO:3 or its cDNA sequence, SEQ ID NO:5 or its cDNA sequence, or the mature polypeptide encoded sequence of SEQ ID NO:7 or its cDNA sequence has at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity.
[5] polypeptide of section 1, it comprises or consists of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or SEQ ID NO:8, or SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8.
[6] polypeptide of section 5, wherein said mature polypeptide is the amino acid 21 to 529 of amino acid/11 7 to 477, the SEQ ID NO:6 of amino acid/11 9 to 475, the SEQ ID NO:4 of SEQ ID NO:2, or the amino acid 22 to 480 of SEQ ID NO:8.
[7] polypeptide of section 1, it is SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 comprises the variant of replacement, disappearance and/or insertion in one or more positions.
[8] polypeptide of section 1, it is SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the fragment of SEQ ID NO:8, wherein said fragment has xylanase activity.
[9] isolated polypeptide, it comprises catalytic domain, and described catalytic domain is selected from lower group: (a) catalytic domain, the amino acid 21 to 366 of itself and SEQ ID NO:6 has at least 60% sequence identity; (b) catalytic domain, it is by polynucleotide encoding, and described polynucleotide are hybridized with Nucleotide 61 to 1423 or its total length complement of SEQ ID NO:5 under at least high stringent condition; (c) catalytic domain, it is by polynucleotide encoding, and the Nucleotide 61 to 1423 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity; (d) variant that the amino acid 21 to 366 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; (e) (a), (b), (c) or catalytic domain (d) have the variant of cellulolytic enhancing activity.
[10] polypeptide of section 9, it further comprises cellulose binding domain.
[11] isolated polypeptide, it comprises the sugar that is operably connected to catalytic domain in conjunction with territory, and wherein said combination territory is selected from lower group: (a) sugar is in conjunction with territory, and the amino acid 494 to 529 of itself and SEQ ID NO:6 has at least 60% sequence identity; (b) sugar is in conjunction with territory, and it is by polynucleotide encoding, and described polynucleotide are hybridized with Nucleotide 1805 to 1912 or its total length complement of SEQ ID NO:5 under at least high stringent condition; (c) sugar is in conjunction with territory, and it is by polynucleotide encoding, and the Nucleotide 1805 to 1912 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity; (d) variant that the amino acid 494 to 529 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; (e) (a), (b), (c) or cellulose binding domain (d) have sugar in conjunction with active variant.
[12] polypeptide of section 11, wherein said catalytic domain obtains from following: lytic enzyme, isomerase, ligase enzyme, lyase, oxygen is enzyme or transferring enzyme also, for example aminopeptidase, amylase, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, at, Maltose 4-glucosyltransferase, deoxyribonuclease, endoglucanase, esterase, alpha-galactosidase, beta-galactosidase enzymes, glucoamylase, alpha-glucosidase, beta-glucosidase enzyme, saccharase, laccase, lipase, mannosidase, become glycanase, oxydase, pectin decomposing enzyme, peroxidase, phytase, polyphenoloxidase, proteolytic ferment, rnase, trans-glutaminases, zytase or xylobiase.
[13] composition, the polypeptide of its section of comprising 1-12 any one.
[14] polynucleotide for separation, the polypeptide of its coding section 1-12 any one.
[15] nucleic acid construct or an expression vector, the polynucleotide of its section of comprising 14, described polynucleotide are operably connected to one or more regulating and controlling sequences, and described regulating and controlling sequence instructs the generation of described polypeptide in expressive host.
[16] recombinant host cell, the polynucleotide of its section of comprising 14, described polynucleotide are operably connected to one or more regulating and controlling sequences, and described regulating and controlling sequence instructs the generation of polypeptide.
[17] method for the polypeptide of any one in the section of generation 1-12, it comprises: culturing cell under the condition that contributes to described polypeptide to produce, described cell produces described polypeptide with its wild-type form.
[18] method of section 17, it also comprises the described polypeptide of recovery.
[19] generation has a method for the polypeptide of xylanase activity, and it comprises: the host cell of cultivating section 16 under the condition that contributes to described polypeptide to produce.
[20] method of section 19, it also comprises the described polypeptide of recovery.
[21] transgenic plant, plant part or a vegetable cell, the polynucleotide of the polypeptide of its encoded section of 1-12 any one transform.
[22] generation has a method for the polypeptide of xylanase activity, and it comprises: transgenic plant or the vegetable cell of under the condition that contributes to described polypeptide to produce, cultivating section 15.
[23] method of section 22, it also comprises the described polypeptide of recovery.
[24] produce the method for the mutant of parental cell, described method comprises the polynucleotide inactivation of the polypeptide that makes any one in coding section 1-12, causes mutant generation described polypeptide still less compared with parental cell.
[25] mutant cell being produced by the method for section 24.
[26] mutant cell of section 25, it further comprises the gene of encode natural or heterologous protein.
[27] a kind of protedogenous method of product, it comprises: the mutant cell of cultivating section 25 or 26 under the condition that contributes to described albumen to produce.
[28] method of section 27, it also comprises the described albumen of recovery.
[29] double-stranded inhibitory RNA (dsRNA) molecule, the subsequence of the polynucleotide of its section of comprising 14, wherein optionally this dsRNA is siRNA or miRNA molecule.
[30] double-stranded inhibitory RNA (dsRNA) molecule of section 29, its length is approximately 15,16,17,18,19,20,21,22,23,24,25 or more duplex Nucleotide.
[31] method for the expression of the polypeptide that inhibition has an xylanase activity in cell, it comprises uses or at double-stranded inhibitory RNA (dsRNA) molecule of cells section 29 or 30 cell.
[32] cell being produced by the method for section 31.
[33] cell of section 32, it further comprises the gene of encode natural or heterologous protein.
[34] a kind of protedogenous method of product, it comprises: the cell of cultivating section 32 or 33 under the condition that contributes to described albumen to produce.
[35] method of section 34, it also comprises the described polypeptide of recovery.
[36] a kind of polynucleotide of separation, its coded signal peptide, described signal peptide comprises or consists of the amino acid/11 to 18 of SEQ ID NO:2, the amino acid/11 to 16 of SEQ ID NO:4, the amino acid/11 to 20 of SEQ ID NO:6, or the amino acid/11 to 21 of SEQ ID NO:8.
[37] nucleic acid construct or an expression vector, the gene of the proteins encoded of its polynucleotide that comprise the section of being operably connected to 36, wherein said gene is external source for the polynucleotide of the described signal peptide of coding.
[38] recombinant host cell, the gene of the proteins encoded of its polynucleotide that comprise the section of being operably connected to 36, wherein said gene is external source for the polynucleotide of the described signal peptide of coding.
[39] a kind of protedogenous method of product, it comprises: under the condition that contributes to described albumen to produce, cultivate recombinant host cell, the gene of the proteins encoded of the polynucleotide that described recombinant host cell comprises the section of being operably connected to 36, wherein said gene is external source for the polynucleotide of the described signal peptide of coding.
[40] method of section 39, it also comprises the described albumen of recovery.
[41] degradation of fibers cellulosic material or the technique containing xylan material, it comprises: in section 1-12, under the polypeptide existence with xylan activity of any one, process described cellulose materials or contain xylan material with enzyme composition.
[42] section 41 technique, wherein said cellulose materials or containing xylan material through pre-treatment.
[43] technique of section 41 or 42 any one, wherein said enzyme composition comprises one or more (for example several) and is selected from the enzyme of lower group: cellulase, the polypeptide with cellulolytic enhancing activity, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.
[44] technique of section 43, wherein said cellulase is that one or more are selected from the enzyme of lower group: endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.
[45] technique of section 43, wherein said hemicellulase is that one or more are selected from the enzyme of lower group: zytase, acetyl xylan esterase, feruloyl esterase, arabinofuranosidase, xylosidase and glucuronidase.
[46] technique of any one in section 41-45, also comprises and reclaiming through the cellulose materials of degraded or containing xylan material.
[47] section 46 technique, wherein through the cellulose materials of degraded or be sugar containing xylan material.
[48] technique of section 47, wherein said sugar is selected from lower group: glucose, wood sugar, seminose, semi-lactosi, and pectinose.
[49] produce the technique of tunning, it comprises: under (a) in section 1-12, the polypeptide with xylanase activity of any one exists, by enzyme composition diastatic fiber cellulosic material or containing xylan material; (b) with the fermentation of one or more organism of fermentation through the cellulose materials of saccharification or containing xylan material to produce tunning; (c) reclaim tunning from fermentation.
[50] section 49 technique, wherein said cellulose materials or be pretreated containing xylan material.
[51] technique of section 49 or 50, wherein said enzyme composition comprises one or more (for example several) and is selected from the enzyme of lower group: cellulase, the polypeptide with cellulolytic enhancing activity, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.
[52] technique of section 51, wherein said cellulase is that one or more are selected from the enzyme of lower group: endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.
[53] technique of section 51, wherein said hemicellulase is that one or more are selected from the enzyme of lower group: zytase, acetyl xylan esterase, feruloyl esterase, arabinofuranosidase, xylosidase and glucuronidase.
[54] technique of any one in section 49-53, wherein step (a) and (b) at the same time saccharification and ferment in carry out simultaneously.
[55] technique of any one in section 49-54, wherein tunning is alcohol, alkane, naphthenic hydrocarbon, alkene, amino acid, gas, isoprene, ketone, organic acid or polyketide.
[56] a kind of fermented cellulose material or the technique containing xylan material, it comprises: for example, with one or more (several) organism of fermentation fermented cellulose materials or containing xylan material, and wherein said cellulose materials or be with enzyme composition saccharification containing xylan material under the existence of the polypeptide with xylanase activity of any one in section 1-12.
[57] technique of section 56, wherein said cellulose materials or the fermentation containing xylan material produce tunning.
[58] technique of section 57, also comprises from fermentation and reclaims tunning.
[59] technique of section 57 or 58, wherein tunning is alcohol, alkane, naphthenic hydrocarbon, alkene, amino acid, gas, isoprene, ketone, organic acid or polyketide.
[60] technique of section 56-59 any one, wherein said cellulose materials or containing xylan material before saccharification through pre-treatment.
[61] technique of section 56-60 any one, wherein said enzyme composition comprises one or more enzymes that is selected from lower group: cellulase, the polypeptide with cellulolytic enhancing activity, hemicellulase, esterase, claviformin, laccase, lignin decomposition enzyme, polygalacturonase, peroxidase, proteolytic enzyme and swollenin.
[62] technique of section 61, wherein said cellulase is that one or more are selected from the enzyme of lower group: endoglucanase, cellobiohydrolase and beta-glucosidase enzyme.
[63] technique of section 61, wherein said hemicellulase is that one or more are selected from the enzyme of lower group: zytase, acetyl xylan esterase, feruloyl esterase, arabinofuranosidase, xylosidase and glucuronidase.
[64] a kind of full nutrient solution formulation or cell culture compositions, the polypeptide of its section of comprising 1-12 any one.
Description and claimed the present invention is herein not limited in the scope of concrete aspect disclosed herein, because these aspects are intended to the explanation as the several aspects of the present invention.Be intended to any aspect being equal to be contained in scope of the present invention.In fact, from the foregoing description, except herein shown and described, multiple amendment of the present invention is apparent for a person skilled in the art.These amendments are also intended to fall in the scope of appending claims.The in the situation that of conflict, will be as the criterion with the disclosure that comprises definitional part.

Claims (20)

1. have an isolated polypeptide for xylanase activity, it is selected from lower group:
(a) polypeptide, itself and SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 has at least 60% sequence identity;
(b) polypeptide, it is by polynucleotide encoding, described polynucleotide are hybridized with following under at least medium-Gao stringent condition: (i) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the mature polypeptide encoded sequence of SEQ ID NO:7, (ii) SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, or the cDNA sequence of SEQ ID NO:7, or (iii) (i) or total length complement (ii);
(c) polypeptide, it is by polynucleotide encoding, described polynucleotide and SEQ ID NO:1, SEQ ID NO:3 or its cDNA sequence, SEQ ID NO:5 or its cDNA sequence, or the mature polypeptide encoded sequence of SEQ ID NO:7 or its cDNA sequence has at least 60% sequence identity;
(d) SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8 for example, comprises the variant of replacement, disappearance and/or insertion in one or more (several) position; With
(e) (a), (b), (c) or polypeptide (d) have the fragment of xylanase activity.
2. the polypeptide of claim 1, it comprises or consists of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or SEQ ID NO:8, or SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or the mature polypeptide of SEQ ID NO:8.
3. an isolated polypeptide, it comprises catalytic domain, and described catalytic domain is selected from lower group:
(a) catalytic domain, the amino acid 21 to 366 of itself and SEQ ID NO:6 has at least 60% sequence identity;
(b) catalytic domain, it is by polynucleotide encoding, and described polynucleotide are hybridized with following under at least high stringent condition: the Nucleotide 61 to 1423 of SEQ ID NO:5 or its total length complement;
(c) catalytic domain, it is by polynucleotide encoding, and the Nucleotide 61 to 1423 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity;
(d) variant that the amino acid 21 to 366 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; With
(e) (a), (b), (c) or catalytic domain (d) have the variant of cellulolytic enhancing activity.
4. an isolated polypeptide, it comprises the sugar that is operably connected to catalytic domain in conjunction with territory, and wherein said combination territory is selected from lower group:
(a) sugar is in conjunction with territory, and the amino acid 494 to 529 of itself and SEQ ID NO:6 has at least 60% sequence identity;
(b) sugar is in conjunction with territory, and it is by polynucleotide encoding, and described polynucleotide are hybridized with following under at least high stringent condition: the Nucleotide 1805 to 1912 of SEQ ID NO:5 or its total length complement;
(c) sugar is in conjunction with territory, and it is by polynucleotide encoding, and the Nucleotide 1805 to 1912 of described polynucleotide and SEQ ID NO:5 has at least 60% sequence identity;
(d) variant that the amino acid 494 to 529 of SEQ ID NO:6 comprises replacement, disappearance and/or inserts in one or more positions; With
(e) (a), (b), (c) or cellulose binding domain (d) have sugar in conjunction with active variant.
5. a composition, the polypeptide that it comprises claim 1-4.
6. polynucleotide for separation, the polypeptide of its coding claim 1-4.
7. a recombinant host cell, the polynucleotide that it comprises claim 6, described polynucleotide are operably connected to the regulating and controlling sequence of one or more generations of instructing polypeptide.
8. a method that produces the polypeptide of claim 1-4, it comprises:
(a) culturing cell under the condition that contributes to described polypeptide to produce, described cell produces described polypeptide with its wild-type form; Optionally
(b) reclaim described polypeptide.
9. generation has a method for the polypeptide of xylanase activity, and it comprises:
(a) under the condition that contributes to described polypeptide to produce, cultivate the host cell of claim 7; Optionally
(b) reclaim described polypeptide.
10. transgenic plant, plant part or a vegetable cell, its polynucleotide with the polypeptide of coding claim 1-4 transform.
11. 1 kinds of generations have the method for the polypeptide of xylanase activity, and it comprises:
(a) under the condition that contributes to described polypeptide to produce, cultivate transgenic plant or the vegetable cell of claim 10; Optionally
(b) reclaim described polypeptide.
12. produce a method for the mutant of parental cell, described method comprises the polynucleotide inactivation of the polypeptide of the claim 1-4 that makes to encode, it causes mutant generation described polypeptide still less compared with parental cell.
Double-stranded inhibitory RNA (dsRNA) molecule of the subsequence of 13. 1 kinds of polynucleotide that comprise claim 6, wherein optionally described dsRNA is siRNA or miRNA molecule.
The method of the expression of the polypeptide that 14. 1 kinds of inhibition have a zytase in cell, it comprises uses or at double-stranded inhibitory RNA (dsRNA) molecule of cells claim 13 cell.
The polynucleotide of 15. 1 kinds of separation, its coded signal peptide, described signal peptide comprises or consists of the amino acid/11 to 18 of SEQ ID NO:2, the amino acid/11 to 16 of SEQ ID NO:4, the amino acid/11 to 20 of SEQ ID NO:6, or the amino acid/11 to 21 of SEQ ID NO:8.
16. 1 kinds produce method of protein, and it comprises:
(a) under the condition that contributes to described protein to produce, cultivate recombinant host cell, the gene that described recombinant host cell comprises the coded protein being operatively connected with the polynucleotide of claim 15, wherein said gene is external source for the polynucleotide of coded signal peptide; With
(b) reclaim described polypeptide.
17. 1 kinds of degradation of fibers cellulosic material or containing the method for xylan material, it comprises: process cellulose materials with enzyme composition or containing xylan material under the polypeptide with xylanase activity of claim 1-4 exists.
18. 1 kinds produce the method for tunning, and it comprises:
(a) under the polypeptide with xylanase activity of claim 1-4 exists, by enzyme composition diastatic fiber cellulosic material or containing xylan material;
(b) with the fermentation of one or more organism of fermentation through the cellulose materials of saccharification or containing xylan material to produce tunning; With
(c) from described fermentation, reclaim described tunning.
19. 1 kinds of fermented cellulose materials or containing the method for xylan material, it comprises: with one or more organism of fermentation fermented cellulose materials or containing xylan material, and wherein said cellulose materials or be with enzyme composition saccharification under the existence of the polypeptide with xylanase activity of claim 1-4 any one containing xylan material.
20. 1 kinds of full nutrient solution formulations or cell culture compositions, the polypeptide that it comprises claim 1-4.
CN201280066579.0A 2011-11-11 2012-11-09 Polypeptides having xylanase activity and polynucleotides encoding same Pending CN104039959A (en)

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