WO2001038536A1 - POLYPEPTIDE GlmU ET ADN CODANT POUR CE POLYPEPTIDE - Google Patents
POLYPEPTIDE GlmU ET ADN CODANT POUR CE POLYPEPTIDE Download PDFInfo
- Publication number
- WO2001038536A1 WO2001038536A1 PCT/JP2000/008120 JP0008120W WO0138536A1 WO 2001038536 A1 WO2001038536 A1 WO 2001038536A1 JP 0008120 W JP0008120 W JP 0008120W WO 0138536 A1 WO0138536 A1 WO 0138536A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polypeptide
- dna
- phosphate
- acetylglucosamine
- transformant
- Prior art date
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- 229920001184 polypeptide Polymers 0.000 title claims abstract description 99
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Classifications
-
- 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
- C12N9/10—Transferases (2.)
- C12N9/12—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
- C12N9/1241—Nucleotidyltransferases (2.7.7)
-
- 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
- C12P19/26—Preparation of nitrogen-containing carbohydrates
- C12P19/28—N-glycosides
- C12P19/30—Nucleotides
- C12P19/305—Pyrimidine nucleotides
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y207/00—Transferases transferring phosphorus-containing groups (2.7)
- C12Y207/07—Nucleotidyltransferases (2.7.7)
- C12Y207/07023—UDP-N-acetylglucosamine diphosphorylase (2.7.7.23)
Definitions
- the present invention relates to a polypeptide having N-acetylglycosamine-1-peridyl phosphate transferase (hereinafter abbreviated as GlmU) activity, a DNA encoding the polypeptide, and a recombinant DNA containing the DNA.
- GlmU N-acetylglycosamine-1-peridyl phosphate transferase
- landscape N-acetylglycosamine-1-peridyl phosphate transferase
- N-Acetylglucosamine-11-phosphate-pyridyltransferase (G 1 mU) is a biosynthesis intermediate of bacterial cell wall and lipopolysaccharide of gram-negative bacteria. It is an enzyme that catalyzes the production of acetylglycosamine (hereinafter abbreviated as UDP-GlcNAc).
- UDP-GlcNAc acetylglycosamine
- bacteria belonging to the genus Escherichia [J.
- G 1 mU derived from Escherichia coli has an unstable N-acetylation activity [J. Bacteriol., 176, 6852. (1994)], there is a problem for industrial use.
- An object of the present invention is to provide a polypeptide having GI mU activity, a DNA encoding the polypeptide, a method for producing a polypeptide having GI mU activity using the DNA, and a method using the polypeptide.
- An object of the present invention is to provide an industrially advantageous method for producing UDP-GlcNAc.
- the present inventors have conducted intensive studies to solve the above problems, and found that a gene that complements the temperature sensitivity of a lysozyme-sensitive strain of Corynebacterium glutamicum encodes GI mU polypeptide. Thus, the present invention was completed.
- the present invention relates to the following (1) to (13).
- the amino acid sequence of SEQ ID NO: 1 has one or more amino acids deleted, substituted or added, and comprises N-acetylglucosamine.
- Polypeptides having monophosphate peritransferase activity are:
- the number of amino acids to be deleted, substituted or added is not particularly limited, it is a number that can be deleted, substituted or added by a well-known method such as the site-directed mutagenesis described above. It is preferably 1 to 20, more preferably 1 to 10, and still more preferably 1 to 5.
- polypeptide of the present invention in order for the polypeptide of the present invention to have N-acetylglycosamine-l-monophosphate ditransylase activity, it is necessary to use BLAST (J. Mol. Biol., 215, 403 (1990)), FASTA When calculated using [Methods in Enzymology, 183, 63-98 (1990)] and the like, homology of at least 60%, usually 80% or more, particularly 95% or more with the amino acid sequence described in SEQ ID NO: 1 It is preferable to have
- polypeptide does not include known polypeptides.
- DNA that hybridizes under stringent conditions refers to a DNA having the nucleotide sequence represented by SEQ ID NO: 2 as a probe, a colony hybridization method, and a plaque hybridization method. Or the DNA obtained by using the Southern hybridization method.Specifically, 0.7 to 1.0 mol / l using a filter on which DNA derived from colonies or plaques is immobilized.
- a 0.1- to 2-fold concentration of SSC (saline-sodium citrate) solution [1-fold concentration of SSC solution (150 t-sodium chloride, 15 mmol / l Sodium citrate)]
- SSC saline-sodium citrate
- Hybridization is based on Molecular 'Cloning 2nd Edition, Current Protocols' in' Molecular Biology, DNA Clonin 1: Core Techniques, A Practical Approach, Second Edition, Oxford University (1995) etc. Can be performed according to the method described in (1).
- a hybridizable DNA a DNA having at least 60% or more homology with the nucleotide sequence represented by SEQ ID NO: 2 when calculated using BLAST, FASTA, or the like, preferably 80% DNA having the above homology, more preferably DNA having the homology of 95% or more can be mentioned.
- the DNA does not include any known DNA.
- the transformant according to any one of the above (9) to (11) is cultured in a medium, and the N-acetylglucosamine-1-monophosphate-pyridyltransferase activity is cultured in the culture.
- N-acetylglucosamine 1-phosphate characterized by producing and accumulating a polypeptide having the same, and collecting the polypeptide from the culture.
- a substrate selected from peridine 5'-triphosphate and N-acetylglucosamine phosphate, and the enzyme source, and in the aqueous medium, peridine 5'-diphosphate-N-acetylglucosamine
- a method for producing perysine 5'-diphosphate-N-acetylglucosamine comprising collecting peridine 5'-diphosphate-N-acetylglucosamine from the aqueous medium.
- Glucosamine phosphate is glucosamine monomonophosphate or glucosamine-6-phosphate
- N-acetyldarcosamine phosphate is N-acetylglucosamine-1-phosphate or Nâphosphate.
- the DNA of the present invention can be prepared from a microorganism belonging to the genus Corynepacterium.
- the microorganism belonging to the genus Corynebacterium may be any microorganism belonging to the genus Corynebacterium, for example, Corynebacterium ammoniagenes (Corynebacterium aimoniagenes), Corynebacterium-Corilebacterium (Corynebacterium) callunae), Corynebacterium glutamicum and the like. Specific examples include Corynebacterium glutamicum â² (Corynebacterium glutamicum) ATCC 13032 strain.
- Microorganisms belonging to the genus Corynebacterium are subjected to a known method [for example, the method described in Appl. Microbiol. Biotechnol., 39, 318 (1993)]. And culture. After culturing, the chromosomal DN of the microorganism is isolated and purified according to a known method [eg, the method described in Current Protocols in 'Molecular' Biology, Agric. Biol. Chem., 49, 2925 (1985)]. I do.
- the obtained chromosomal DNA is cleaved with an appropriate restriction enzyme, and the DNA fragment is inserted into a vector for Corynebacterium in a conventional manner, for example, according to the method described in, for example, Molecular cloning, Second Edition, etc. Recombinant DNA can be produced.
- Any vector can be used as long as it can replicate autonomously in microorganisms belonging to the genus Corynebacterium, and pCGl (JP-A-57-134500) and pCG2 (JP-A-58 -35197), pCG4, pCGll (all JP-A-57-183799), pCE53, pCBlOl (all JP-A-58-105999), pCE51, pCE52, pCE53 (all Mol.Gen. Genet., 196, 175) (1984)], pAJ1844 (Japanese Patent Application Laid-Open No. 58-21619), pHK4 (Japanese Patent Laid-Open Publication No.
- pHM1519 [Agric. Biol. Chem., 48, 2901, (1985)]
- pCV35 pECMl [all J. Bacteriol., 172, 1663 (1990)] pC2 [Plasmid, 36, 62 (1996)].
- the recombinant DNA prepared above is introduced into a lysozyme-sensitive microorganism belonging to Corynebacterium lutamicum.
- Corynebacterium glutamicum Corynebacterium glutamicum
- a lysozyme-sensitive microorganism belonging to the genus Corynebacterium glutamicum is a wild-type strain if it belongs to Corynebacterium glutamicum and shows lysozyme sensitivity. Any of the lysozyme-sensitive mutants may be used.
- the wild-type strain is usually lysozyme-sensitive mutant strain, since the growth of 100 g / ml lysozyme is usually not affected at all even if it is present in the medium.
- the lysozyme-sensitive microorganism refers to a microorganism whose growth is inhibited when a low concentration of lysozyme of 50 / g / ml or less is present in a medium.
- the lysozyme susceptible microorganism is Corynepacterium glutamicum Using (Corynebacterium glutamicum) as a parent strain, it can be isolated as a mutant strain according to a known method (Japanese Patent Publication No. 62-49038, Japanese Patent Publication No. 29555, Japanese Patent Publication No. 58-56678). Such mutants include Corynebacterium gulcus Mikum
- Corynebacterium glutamicum ATCC31833 strain isolated from Corynebacterium glutamicum ATCC31834 strain (JP-A-58-56678), or Corynebacterium glutamicum ATCC13032 strain isolated from Corynebacterium glutamicum ATCC13032 strain described below.
- Corynebacterium â Glutamicum Corynebacterium â Glutamicum
- lysozyme-sensitive organisms exhibit temperature-sensitive growth.
- the lysozyme-sensitive and temperature-sensitive (hereinafter abbreviated as lysozyme / temperature-sensitive) microorganisms cannot grow in a high temperature range (for example, 34 to 39 ° C) even when lysozyme is not present in the medium.
- Examples of such mutants include Corynebacterium glutamicum LS6 strain isolated from Corynebacterium glutamicum ATCC13032 strain described below.
- the DNA of the present invention can be obtained as DNA that complements the temperature sensitivity of the lysozyme / temperature-sensitive strain.
- the DNA obtained above is integrated into a vector, and the lysozyme / temperature-sensitive strain is transformed with the vector into which the DNA has been integrated.
- the transformant is cultured in a medium containing no lysozyme at a temperature at which the lysozyme-sensitive microorganism cannot grow, for example, 34 to 39 ° C, preferably 36 to 38 ° C.
- a strain that can grow under the temperature conditions is selected as a strain having the desired DNA, and DNA can be obtained from the strain.
- any method for introducing DNA into the above-mentioned lysozyme / temperature-sensitive microorganism can be used.
- the plast method [JP-A-57-186492, JP-A-58-56678, J. Bacteriol., 159, 306 (1984)], the electrification method (JP-A-2-207791) and the like can be mentioned.
- recombinant DNA is conjugated from Escherichia coli of the library by conjugative transfer according to a known method. It can also be introduced into the lysozyme / temperature-sensitive strain of Corynebacterium glutamicum (J. Bacteriol. 172, 1663 (1990), J. Bacteriol. 178, 5768) (1996)].
- lysozyme / temperature-sensitive strain for example, LB medium [Pacto tryptone (Difco) 10 g / l, yeast extract (Difco) 5 g / l, sodium chloride 5 g / l (pH 7.2)] Incubate in a high temperature range (34-39.C) for 24-72 hours. After the culture, the strain grown on the medium is selected as a strain having the desired DNA.
- the obtained DNA is used as it is, or after digestion with an appropriate restriction enzyme, etc., and incorporated into a vector by an ordinary method.
- a commonly used nucleotide sequence analysis method for example, 373A'DNA Sequencer (manufactured by Perkin-Elma) is used.
- Jidokishi method using [p roc. Natl. Acad. Sci. USA, 74, 5463 (1977)] by determining the nucleotide sequence of the DNA.
- Examples of a vector for incorporating the DNA include pBluescriptKS (+) (Stratagene), pDIRECT [Nucleic Acids Research, 18, 6069 (1990)], pCR-Script Amp SK (+) (Stratagene), pT7Blue (manufactured by Novazidin), pCR II (manufactured by Invitrogen), pCR-TRAP (manufactured by Genehan Yuichi) and pNoTAT7 (manufactured by 5 Prime to 3 Prime) can be mentioned.
- Examples of the DNA having the novel nucleotide sequence obtained as described above include DNA having the sequence represented by SEQ ID NO: 2, and the like.
- the DNA having the nucleotide sequence represented by SEQ ID NO: 2 is represented by SEQ ID NO: 1.
- a polypeptide having an amino acid sequence is coded.
- strains having a plasmid having DNA having a sequence represented by SEQ ID NO: 2 include, for example, Corynebacterium glutamicum (Corynebacterium glutamicum) LS6 / pV5, Corynebacterium glutamicum (Corynebacterium glutamicum) LS6 / pVll and the like.
- a primer based on the nucleotide sequence determined as described above is prepared, and the target DNA can be obtained by PCR using the chromosome DNA as a type [PCR Protocols, Academic Press (1990)].
- a target DNA can also be prepared by chemical synthesis using a Perceptive 8905 DNA synthesizer manufactured by Biosystems.
- the polypeptide of the present invention can be prepared by subjecting the DNA of the present invention to host cells by the method described in Molecular 'Cloning 2nd edition, Current' Protocols' in 'Molecular' biology, etc., for example, the following method. It can be produced by expressing it.
- a transformant producing the polypeptide of the present invention can be obtained.
- the host cell any cells that can express the target gene, such as bacteria, yeast, animal cells, insect cells, and plant cells, can be used.
- An expression vector is one which is capable of autonomous replication in the above-described host cell or capable of integration into a chromosome, and which contains a promoter at a position capable of transcribing DNA encoding the polypeptide of the present invention. Used.
- a recombinant DNA containing the DNA encoding the polypeptide of the present invention can be replicated autonomously in prokaryotes, and at the same time, a promoter and a ribosome can be used. Binding sequence, polypeptide of the invention It is preferable that the vector be composed of a DNA encoding a DNA and a transcription termination sequence. A gene that controls the promoter may be included.
- expression vectors include, for example, pC2 [Plasmid, 36, 62 (1996)], pBTrp2, pBTacl, pBTac2 (all sold by Beilinger Ringermannheim), pKK233-2 (Pharmacia), pSE280 ( Invitrogen), pGEMEX-l (Promega), pQE-8 (QIAGEN), pKYP10 (JP-A-58-110600), pKYP200 (Agricultural Biological Chemistry, 48, 669 (1984)), pLSAl (Agric) Biol. Chem., 53, 277 (1989)], pGELl [Proc. Natl. Acad. Sci. USA, 82, 4306 (1985)].
- the promoter may be any promoter that can be expressed in the host cell.
- trp promoter evening one (P trp), lac promoter evening one, P L promoter Isseki -, P R promoter evening one, one such T7 promoter Isseki, the flop Romo Isseki one derived from Escherichia coli or phage, etc. I can give it.
- the promoter evening one obtained by two series of P trp (P trp X 2) , tac promoter evening one, lacT7 promoter Isseki one, also used promoters are for designed modified human as letl Promo Isseki one such be able to.
- a plasmid in which the distance between the Shine-Dalgarno sequence, which is a liposome-binding sequence, and the initiation codon is adjusted to an appropriate distance (for example, 6 to 18 bases).
- a transcription termination sequence is not necessarily required for expression of the DNA of the present invention, but it is preferable to arrange a transcription termination sequence immediately below a structural gene.
- Host cells include the genus Escherichia, the genus Serratia, the genus Bacillus, the genus Brevibacterium, the Corynebacterium, and the Microbacterium.
- Microorganisms belonging to the genus Pseudomonas such as Escherichia coli XLl-Blue, Escherichia col i XL2-Blue, Escherichia coli DHK Escherichia coli MC1000, Escherichia col i KY3276, Escherichia coli W1485, Escherichia coli JM109, Escher col i HB101, Escherichia col i No.49, Escherichia coli W3110, Escherichia col i NY49, Serratia ficaria, Serratia fonticola, Serratia liquefaciens, Serratia marcescens, Baci l lus subti l is Bacillus amyloliquef
- i Marauder ariophilum ATCC14068 Brevibacterium saccharolyticum ATCC14066, Brevibacterium f lavum ATCC14067, Brevibacterium lactofermentum ATCC13869, Corynebacterium glutamicum ATCC13032, Corynebacterium acetoacidophilum ATCC13870, Microbacterium sp.
- any method can be used as long as it is a method for introducing DNA into the above host cells.
- a method using calcium ions for example, a method using calcium ions
- yeast When yeast is used as a host cell, examples of expression vectors include YEP13 (ATCC37115), YEp24 (ATCC37051), and YCp50 (ATCC37419).
- promoters for glycolytic genes such as hexose kinase, PH05 promoter, PGK promoter, etc. 1, GAP Promote, ADH Promote, gal1 promoter, gal10 promoter, Heat Shock Polypeptide Promote, MF Hi Promote, CUP1 Promote, etc.
- Examples of the host cell include microorganisms belonging to the genus Saccharomyces, the genus Kluyveromyces, the genus Trichosporon, the genus Schwanniomyces, etc. O, Trichosporon pullulans, Schwanniomyces alluvius, etc.
- any method can be used as long as it introduces DNA into yeast.
- an electrolysis method [Methods. Enzymol., 194, 182 (1990)], USA, 84, 1929 (1978), Lithium acetate method [J. BacterioL, 153, 163 (1983)], Proc. Natl. Acad. Sci. USA, 75 , 1929 (1978).
- examples of expression vectors include pcDNAI, pcDM8 (commercially available from Funakoshi), PAGE107 [Japanese Patent Laid-Open No. 3-22979; Cytotechnology,, 133, (1990)], pAS3-3 (Japanese Patent Laid-open No. 2-227075), pCDM8 [Nature, 329, 840 (1987)], pcDNAI / Amp (Invitrogen), REP4 (Invitrogen), pAGE103 [J.
- CMV cytomegalovirus
- IE Eli ediateearly
- CMV cytomegalovirus
- early promoter of SV40 retrovirus promoter
- retrovirus promoter meta mouth choynein promoter
- heat shock promoter even
- SR hip mouth promoter etc.
- enhancer of the IE gene of human CMV may be used together with the promoter.
- Examples of the host cell include Namalwa cell which is a human cell, COS cell which is a monkey cell, CH0 cell which is a Chinese hamster cell, and HBT5637 (Japanese Patent Publication No. 63-299). .
- any method for introducing DNA into animal cells can be used.
- the electroporation method [Cytotechnology, 3, 133 (1990)] Natl. Acad. Sci. USA, 84, 7413 (1987)], and the like.
- polypeptide can be expressed by the method described in Bio / Technology, 6, 47 (1988) and the like.
- the recombinant gene transfer vector and baculovirus are co-transfected into insect cells to obtain the recombinant virus in the culture supernatant of insect cells, and then the recombinant virus is infected into the insect cells to express the polypeptide. Can be done.
- Examples of the gene transfer vector used in the method include pVL1392, pVL1393, and pBlueBacII (all manufactured by Invitorogen).
- baculovirus for example, Atographa, Californi force, Nuclea, polyhedrosis, virus (Autographa cal iiornica nuclear polyhedrosis virus), which is a virus that infects insects of the night moth family, can be used.o
- Insect cells include Spodoptera frugiperda ovarian cells Sf9, Sf21 [Baculovirus Expression Vectors, A Laboratory Manual, WH Freeman and Company, New York (1992)], and Trichoplusia ovarian cell High 5 (manufactured by Invitrogen) can be used.
- Methods for co-transferring the above-described recombinant gene into insect cells and the above-mentioned baculovirus into insect cells for preparing a recombinant virus include, for example, calcium phosphate method (Japanese Patent Laid-Open No. 2-227075), and Lipofexion method. Natl. Acad. Sci. USA, 84, 7413 (1987)].
- the expression vector may be, for example, Ti plasmid, evening paco mosaic virus vector, or the like.
- Any promoter can be used as long as it can be expressed in plant cells, and examples thereof include the 35S promoter of Cauliflower Mosaic Virus (CaMV) âYuichi, Inactin 1 promoter and the like.
- CaMV Cauliflower Mosaic Virus
- Examples of the host cell include plant cells of tobacco, potato, tomato, carrot, soybean, abrana, alfa alfa, rice, wheat, wheat, and the like.
- Any method for introducing the recombinant DNA can be used as long as it is a method for introducing DNA into plant cells.
- a method using Agrobacterium Japanese Patent Laid-Open No. 59-140885, 60-70080, W094 / 00977
- the electoration method Japanese Patent 60-251887
- a method using a particle gun (gene gun) Patent No. 2606856, Patent No. 2517813
- a sugar or a sugar chain-added polypeptide When expressed by yeast, animal cells, insect cells or plant cells, a sugar or a sugar chain-added polypeptide can be obtained.
- the transformant obtained as described above is cultured in a medium, the polypeptide of the present invention is produced and accumulated in the culture, and the polypeptide of the present invention is collected from the culture. Ripeptides can be produced.
- the method for culturing the transformant of the present invention in a medium can be performed according to a usual method used for culturing a host.
- a medium for culturing the transformant may be a carbon which the organism can assimilate. Any of a natural medium and a synthetic medium may be used as long as the medium contains a source, a nitrogen source, inorganic salts and the like, and can efficiently culture the transformant.
- the carbon source may be any one that can be assimilated by the organism, such as glucose, fructose, sucrose, molasses containing them, carbohydrates such as starch or hydrolyzed starch, and organic acids such as acetic acid and propionic acid. Alcohols such as acid, ethanol, and propanol can be used.
- Nitrogen sources include ammonia, ammonium chloride, ammonium sulfate, ammonium acetate, ammonium phosphate, and other ammonium or inorganic acid ammonium salts, other nitrogen-containing compounds, and peptone, meat extract, yeast extract, copper extract, etc. Plyka, casein hydrolyzate, soybean meal and soybean meal hydrolyzate, various fermented cells and digests thereof can be used.
- potassium potassium phosphate potassium potassium phosphate, magnesium phosphate, magnesium sulfate, sodium chloride, ferrous sulfate, manganese sulfate, copper sulfate, calcium carbonate, and the like can be used.
- the culture is usually performed under aerobic conditions such as shaking culture or deep aeration stirring culture.
- the culture temperature is preferably 15 to 40 ° C, and the culture time is usually 16 hours to 7 days.
- the pH during culture is maintained at 3.0-9.0.
- the pH is adjusted using an inorganic or organic acid, an alkaline solution, urea, calcium carbonate, ammonia, or the like.
- antibiotics such as ambicillin, tetracycline, and kanamycin may be added to the medium during the culture.
- an inducer may be added to the medium, if necessary.
- an inducer may be added to the medium, if necessary.
- transformed with a recombinant vector using the lac promoter When culturing microorganisms, use isoprovir-1 /?-D-thiogalactobilanoside, etc., and when culturing microorganisms transformed with a recombinant vector using trp promoter overnight, use indoleacrylic acid, etc. It may be added to the medium.
- RPMI 1640 medium As a medium for culturing a transformant obtained using animal cells as a host, a commonly used RPMI 1640 medium [The Journal of the American Medical
- Culture is carried out usually p H6 â 8, 30 â 40 ° C, 5 ° C0 2 present 1 to 7 days under conditions such as lower. If necessary, antibiotics such as kanamycin and penicillin may be added to the medium during the culture.
- T-FH medium manufactured by PharMingen
- Sf-900 II SFM medium manufactured by Life Technologies
- ExCel OO ExCe 11405
- Grace's Insect Medium a medium for culturing a transformant obtained using an insect cell as a host
- the cultivation is usually performed under conditions of pH 6 to 7 and 25 to 30 ° C for 1 to 5 days.
- an antibiotic such as gentamicin may be added to the medium during the culturing.
- a transformant obtained using a plant cell as a host can be cultured as a cell or after being differentiated into a cell organ of a plant.
- a medium for culturing the transformant commonly used Murashige and Skog (MS) medium, white (White) medium, or plant medium such as auxin, cytokinin, etc. And the like can be used.
- Cultivation is usually performed at pH 5 to 9 and 20 to 40 ° C for 3 to 60 days.
- antibiotics such as kanamycin and hygromycin may be added to the medium during the culture.
- a microorganism, animal cell, or plant cell-derived transformant having a recombinant DNA into which the DNA encoding the polypeptide of the present invention has been incorporated is cultured according to a conventional culture method. By producing and accumulating the polypeptide and collecting the polypeptide from the culture, the polypeptide can be produced.
- the method for producing the polypeptide of the present invention includes a method of producing the polypeptide in a host cell, a method of secreting the polypeptide outside the host cell, and a method of producing the polypeptide on the host cell outer membrane.
- the method can be selected by changing the structure of the polypeptide.
- the polypeptide of the present invention is expressed extracellularly by adding a signal peptide in front of the polypeptide containing the active site of the polypeptide of the present invention using a gene recombination technique. Can be secreted.
- the production amount can be increased using a gene amplification system using a dihydrofolate reductase gene or the like.
- the transgenic animal or plant cells are redifferentiated to create transgenic non-human animals or transgenic plants (transgenic plants) into which the gene has been introduced. Can be used to produce the polypeptide of the present invention.
- the transformant is an animal or plant, rear it according to the usual method.
- the polypeptide can be produced by cultivation, producing and accumulating the polypeptide, and collecting the polypeptide from the animal or plant individual.
- a transgenic non-human animal into which the DNA encoding the polypeptide of the present invention has been introduced is bred, and the polypeptide is produced and accumulated in the animal, and By collecting the polypeptide, the polypeptide can be produced.
- the place of production and accumulation in the animal include milk of the animal (JP-A-63-309192), eggs and the like.
- the promoter used at this time any promoter that can be expressed in an animal can be used.
- a promoter that is specific to a mammary gland cell, a casein promoter, a casein promoter, Lactoglobulin promoter, whey acidic protein promoter and the like are preferably used.
- a transgenic plant into which DNA encoding the polypeptide of the present invention has been introduced can be prepared by a known method [tissue culture, 20 (1994) , Tissue Culture, 21 (1995), Trends in
- the polypeptide of the present invention when expressed in a lysed state in cells, after the culture is completed, the cells are collected by centrifugation, suspended in an aqueous buffer, and then sonicated. The cells are crushed with a mortar, French press, Mentongaulin homogenizer, Dynomill, etc. to obtain a cell-free extract.
- a normal enzyme isolation and purification method that is, a solvent extraction method, a salting-out method using ammonium sulfate, a desalting method, an organic solvent Precipitation method, anion exchange chromatography using resin such as getylaminoethyl (DEAE) -Sepharose, DIAI0N HPA-75 (manufactured by Mitsubishi Chemical), resin using S-Sepharose FF (manufactured by Pharmacia) Cation exchange chromatography, hydrophobic chromatography using resins such as butyl sepharose and phenylsepharose, gel filtration using molecular sieve, affinity chromatography, chromatofocusing, isoelectrics
- a purified sample can be obtained using techniques such as electrophoresis such as point electrophoresis alone or in combination.
- the cells are similarly recovered, crushed, and the precipitate fraction obtained by centrifugation is subjected to a conventional method to obtain the polypeptide.
- the insoluble form of the polypeptide is solubilized with a polypeptide denaturing agent.
- the lysate is diluted or dialyzed into a solution containing no polypeptide denaturing agent or diluted so that the concentration of the polypeptide denaturing agent does not denature the polypeptide.
- a purified sample can be obtained by the same isolation and purification method as described above.
- the derivative such as the polypeptide or a sugar chain adduct thereof can be recovered in the culture supernatant. That is, a soluble fraction is obtained by treating the culture by a method such as centrifugation as described above, and a purified sample is obtained from the soluble fraction by using the same isolation and purification method as described above. Can be obtained.
- polypeptide examples include a polypeptide having the amino acid sequence of SEQ ID NO: 1.
- polypeptide of the present invention can be synthesized by chemical synthesis methods such as the Fmoc method (fluorenylmethyloxycarbonyl method) and the tBoc method (t-butyloxycarbonyl method). Can also be manufactured. Also, manufactured by Advanced ChemTech, Perkin Enolema, Pharmacia ( â , Protein Technology Instrument,
- Chemical synthesis can also be performed using a peptide synthesizer manufactured by Synthecell-Vega, PerSeptive, Shimadzu, or the like.
- the culture medium of the transformant obtained by the culture described in (2) above and the culture product obtained by variously treating the culture medium are used as an enzyme source, and the enzyme source and the substrate are both present in an aqueous medium. By doing so, UDP-GlcNAc can be produced in the aqueous medium.
- Examples of the processed product of the culture solution include a concentrate of the culture solution, a dried product of the culture solution, cells obtained by centrifuging the culture solution, a dried product of the cells, a freeze-dried product of the cells, and the cells.
- Surfactant treated product ultrasonically treated product of the cell, mechanically ground product of the cell, solvent-treated product of the cell, enzyme-treated product of the cell, polypeptide component of the cell O, an immobilized product of the cells or an enzyme preparation obtained by extraction from the cells.
- the concentration of the enzyme source used in the production of UDP-GlcNAc is 1 to 500 g of wet cells / 1 when converted into cells (wet cells) obtained from the culture solution by centrifugation.
- an enzyme concentration corresponding to a concentration of 10 to 300 g wet cells / 1 is used.
- Aqueous media used in the production of UDP-GkMc include water, buffer solutions such as phosphate, carbonate, acetate, borate, citrate, and tris; alcohols such as methanol and ethanol; and acetic acid. Examples include esters such as ethyl, ketones such as acetone, and amides such as acetoamide.
- a culture solution of the microorganism used as the enzyme source can be used as the aqueous medium.
- a surfactant or an organic solvent may be added as necessary.
- the surfactant include nonionic surfactants such as polyoxyethylene octadecylamine (for example, Nymeen S-215, manufactured by NOF Corporation), acetyltrimethylammonium, bromidealkyldimethyl, benzylammonium.
- Cationic surfactants such as dimethyl chloride (eg, cation F2-40E, manufactured by NOF Corporation), anionic surfactants such as lauroyl 'sarcosinate, alkyldimethylamine (eg, tertiary amine FB, manufactured by NOF Corporation) Any of the tertiary amines, such as tertiary amines, which do not inhibit the production of UDP-GlcNAc can be used, and one or more of them can be used in combination.
- the surfactant is usually used at a concentration of 0.1 to 50 g / l.
- the organic solvent include xylene, toluene, aliphatic alcohol, acetone, and ethyl acetate, which are generally used at a concentration of 0.1 to 50 ml / l.
- Substrates used in the production of UDP-GlcNAc include peridine 5'-triphosphate and glucosamine derivatives.
- Glucosamine derivatives include glucosamine phosphate selected from glucosamine-monophosphate and glucosamine-6-phosphate, or N-acetylglucosamine-1-phosphate and N-acetylglucosamine-16-phosphate. N-acetyldarcosamine phosphate.
- acetylcoenzyme A acetyl CoA
- glucosamine monomonophosphate or N-acetylglucosamine-1-monophosphate is used as the glucosamine derivative.
- an enzyme having an activity of converting glucosamine-6-phosphate or N-acetylglucosamine-6-phosphate to glucosamine-1-phosphate or N-acetylglucosamine-11-monophosphate is used.
- glucosamine-6-phosphate or N-acetylglucosamine-16-phosphate can also be used as the glucosamine derivative.
- These substrates are used at a concentration of 0.1-500 t ol / l.
- the production reaction of UDP-GlcNAc is performed in an aqueous medium at pH 5 to 10, preferably pH 6 to 8, at 20 to 60 ° C for 1 to 96 hours.
- aqueous medium at pH 5 to 10, preferably pH 6 to 8, at 20 to 60 ° C for 1 to 96 hours.
- MgCl 2 Inorganic salts can be added.
- the quantification of UDP-GlcNAc produced in the aqueous medium can be performed by a known method using HPLC or the like [for example, W098 / 12343].
- the UDP-GlcNAc generated in the reaction solution can be collected by a usual method using activated carbon, ion exchange resin, or the like.
- FIG. 1 shows the results of the complementation test of the temperature sensitivity of Corynebacteriuin glutamicum LS6 strain by preparing various deletion plasmids for the inserted DNA fragment of about 7 kb
- FIG. plac indicates the position of the lactose promoter present on the vector pC2. + Indicates complementation of temperature sensitivity.
- a schematic restriction enzyme map of the inserted DNA fragment of about 7 kb and the position and direction of the glmU gene are shown in the figure.
- Corynebacterium 'Corynebacteriuin glutamicum ATCC13032 strain was added to 10 ml of L' medium (polypeptone 1%, yeast extract 0.53 â 4, sodium chloride 0.53 â 4, glucose 0.1%, thiamine hydrochloride 20mg / l, pH7.2 ) And inoculated at 30 ° C.
- L' medium polypeptone 1%, yeast extract 0.53 â 4, sodium chloride 0.53 â 4, glucose 0.1%, thiamine hydrochloride 20mg / l, pH7.2
- the cells were washed with TE buffer [10 ol / l Tris-HCl, lmol / 1 ethylenediaminetetraacetic acid (EDTA), â . â ], and suspended in 800 â 1 of the same buffer. did. To the suspension, add 40 mg / ml 50 mg / ml lysozyme solution and 20 mg / ml 10 mg / ml RNaseA solution. The reaction was performed at 37 ° C for 1 hour.
- TE buffer 10 ol / l Tris-HCl, lmol / 1 ethylenediaminetetraacetic acid (EDTA), â . â
- a 20% sodium dodecyl sulfate (SDS) solution was added to the reaction solution at a ratio of 20/1, and reacted at 70 ° C. for 1 hour.
- 24 mg / ml of a 20 mg / ml proteinase K solution was added and reacted at 50 ° C for 1 hour.
- a 24/1 proteinase K solution was added and reacted at 50 ° C for 1 hour.
- an equal amount of phenol was added, and the mixture was stirred. The mixture was allowed to stand at 4 ° C for 1 minute, DNA was extracted into an aqueous layer, and the aqueous layer was collected.
- the ligation reaction solution was used to transform the lysozyme z temperature-sensitive strain Corynebacterium glutamicum LS6 strain by an electroporation method (Japanese Patent Laid-Open No. 2-207791), and the growth of the LS6 strain was determined by temperature. Transformants were selected based on their sensitivity. That is, the transformant was spread on an L-agar plate medium (L, a medium supplemented with 1.5% agar) containing 5 zl / ml kanamycin, and cultured at 37 ° C for 3 days.
- L-agar plate medium L, a medium supplemented with 1.5% agar
- Plasmid pV5 was found to contain an approximately 7 kb DNA fragment derived from Corynebacterium glutamicum at the â HI site of plasmid pC2. Had the structure shown.
- various deletion plasmids were prepared according to a conventional method.
- the Corynebacterium glutamicum LS6 strain was transformed with the deletion plasmid, and the temperature sensitivity of the transformant was examined. The complementation of the temperature sensitivity required a 2.3 kt â -fragment. (Fig. 1).
- this region encodes the amino acid sequence of 485 amino acid residues shown in SEQ ID NO: 1, and the base sequence shown in SEQ ID NO: 2 There was a 1455 bp open reading frame (ORF) consisting of the sequence.
- HI-1 fragment was designated as FERM BP-6937 as of January 12, 2001 Deposited at the Technical Research Institute (1-3 1-3 Tsukuba East, Ibaraki, Japan, postal code 305-8566).
- FERM BP-6937 The Corynebacterium glutamicum LS6 / pVll containing the plasmid pVll containing the 2.3 kb â 5
- the Corynebacterum glutamicum LS6 / pVll strain obtained in Example 2 was cultured according to the method described in Example 1, and the culture was centrifuged to obtain wet cells.
- the wet cells could be stored at â 20 ° C. if necessary, and thawed before use. Final concentration lOg / 1
- the wet cells 100 germs ol / l Tris-HCl (pH 8.0), 10 kinetics 1/1 glucosamine-1-phosphoric acid, 10 ol / l acetyl C 0 A, 10 ol
- the reaction was carried out at 37 ° C. for 10 minutes in a 0.2 ml reaction solution containing UTP, 2 mmol / l MgCl 2 , 4 g / l Nimin S-215, and 10 ml / l xylene.
- a large amount of G1 mU polypeptide derived from a microorganism belonging to Corynebacterium glutamicum can be produced by a gene recombination technique.
- UDP-GlcMc can be efficiently produced by using the enzyme.
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Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP00976322A EP1234882A4 (en) | 1999-11-19 | 2000-11-17 | GLMU POLYPEPTIDE AND ENCODING DNA |
CA002392000A CA2392000A1 (en) | 1999-11-19 | 2000-11-17 | Glmu polypeptide and dna encoding for the polypeptide |
AU14154/01A AU1415401A (en) | 1999-11-19 | 2000-11-17 | Glmu polypeptide and dna encoding the polypeptide |
US10/130,419 US6911326B1 (en) | 1999-11-19 | 2000-11-17 | GlmU polypeptide and DNA encoding the polypeptide |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP11/329648 | 1999-11-19 | ||
JP32964899 | 1999-11-19 | ||
JP2000-75595 | 2000-03-17 | ||
JP2000075595 | 2000-03-17 |
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WO2001038536A1 true WO2001038536A1 (fr) | 2001-05-31 |
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PCT/JP2000/008120 WO2001038536A1 (fr) | 1999-11-19 | 2000-11-17 | POLYPEPTIDE GlmU ET ADN CODANT POUR CE POLYPEPTIDE |
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US (1) | US6911326B1 (ja) |
EP (1) | EP1234882A4 (ja) |
AU (1) | AU1415401A (ja) |
CA (1) | CA2392000A1 (ja) |
WO (1) | WO2001038536A1 (ja) |
Cited By (1)
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CN108504702A (zh) * | 2012-08-20 | 2018-09-07 | äžå€®ç ç©¶é¢ | 寡ç³ç倧è§æš¡é ¶åæçæ¹æ³ |
Family Cites Families (5)
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US6696561B1 (en) | 1909-07-09 | 2004-02-24 | Basf Aktiengesellschaft | Corynebacterium glutamicum genes encoding proteins involved in membrane synthesis and membrane transport |
EP0870034A1 (en) | 1995-12-11 | 1998-10-14 | Smithkline Beecham Plc | Novel nagpu |
US6043071A (en) | 1997-06-26 | 2000-03-28 | Smithkline Beecham Corporation | GlmU |
KR20070087093A (ko) * | 1999-06-25 | 2007-08-27 | ë°ì€í ì í°ìê²ì €ì€ííž | íì ëì¬ ë° ìëì§ ìì°ê³Œ êŽë šë ëšë°±ì§ì ìœë©íëìœëŠ¬ë€ë°í 늬ì êžë£ší믞쿰 ì ì ì |
JP4623825B2 (ja) | 1999-12-16 | 2011-02-02 | ååçºé µãã€ãªæ ªåŒäŒç€Ÿ | æ°èŠããªãã¯ã¬ãªãã |
-
2000
- 2000-11-17 WO PCT/JP2000/008120 patent/WO2001038536A1/ja not_active Application Discontinuation
- 2000-11-17 US US10/130,419 patent/US6911326B1/en not_active Expired - Fee Related
- 2000-11-17 EP EP00976322A patent/EP1234882A4/en not_active Withdrawn
- 2000-11-17 AU AU14154/01A patent/AU1415401A/en not_active Abandoned
- 2000-11-17 CA CA002392000A patent/CA2392000A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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S.T. COLE ET AL.: "Deciphering the biology of mycobacterium tuberculosis from the complete genome sequence", NATURE, vol. 393, 1998, pages 537 - 544, XP002935450 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108504702A (zh) * | 2012-08-20 | 2018-09-07 | äžå€®ç ç©¶é¢ | 寡ç³ç倧è§æš¡é ¶åæçæ¹æ³ |
CN108504702B (zh) * | 2012-08-20 | 2021-05-04 | äžå€®ç ç©¶é¢ | 寡ç³ç倧è§æš¡é ¶åæçæ¹æ³ |
Also Published As
Publication number | Publication date |
---|---|
AU1415401A (en) | 2001-06-04 |
US6911326B1 (en) | 2005-06-28 |
EP1234882A1 (en) | 2002-08-28 |
EP1234882A4 (en) | 2004-07-28 |
CA2392000A1 (en) | 2001-05-31 |
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