EP1549744A1 - Verfahren sowie mikroorganismus zur herstellung von d-mannitol - Google Patents
Verfahren sowie mikroorganismus zur herstellung von d-mannitolInfo
- Publication number
- EP1549744A1 EP1549744A1 EP03757939A EP03757939A EP1549744A1 EP 1549744 A1 EP1549744 A1 EP 1549744A1 EP 03757939 A EP03757939 A EP 03757939A EP 03757939 A EP03757939 A EP 03757939A EP 1549744 A1 EP1549744 A1 EP 1549744A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sequence
- mannitol
- microorganism
- mdh
- coding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0006—Oxidoreductases (1.) acting on CH-OH groups as donors (1.1)
-
- 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
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/18—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic polyhydric
Definitions
- the invention relates to a method and a microorganism for the production of D-mannitol.
- D-mannitol The worldwide annual demand for the sugar alcohol D-mannitol (D-mannitol) amounts to 30,000 tons per year.
- D-mannitol is used in the food sector as a tooth-preserving sweetener, in medicine as a plasma expander and vasodilator (hexanitro derivative), and in the pharmaceutical industry for the production of tablets.
- D-mannitol The large-scale production of D-mannitol has hitherto been carried out by catalytic hydrogenation on metal catalysts of glucose / fructose mixtures as starting materials. Due to the lack of stereospecificity of the catalytic hydrogenation, the yield of D-mannitol is only 25-30% with a triple excess of D-sorbitol (Makkee M, Kieboom APG, Van Bekkum H (1985), Production methods of D-mannitol. Starch / Thickness 37: 136-140).
- D-mannitol and D-sorbitol differ only in their configuration at the carbon atom C-2 (stereoisomers), so that a separation of the unwanted sorbitol is difficult and time-consuming.
- D-mannitol by enzymatic hydrogenation of D-fructose in a microbial biotransformation process in which a recombinant mannitol dehydrogenase (MDH) is isolated from Pseudomonas fluororescens and together with a formate dehydrogenase (FDH)
- MDH mannitol dehydrogenase
- Candida boidinü and NADH is incubated in a membrane reactor (Slatner, M. et al. (1998) Biotransf. 16: 351-363).
- the use of formate dehydrogenase creates a reduction-oxidation cycle for NADH, which is retained by the membrane in the reaction vessel.
- 70-90% of the fructose could be converted into D-mannitol.
- the mannitol dehydrogenase used has a poor stability (50 h half-life; after stabilization with dithiothreitol: 100 h), sensitivity against high temperatures> 30 ° C and against shear forces.
- Another major disadvantage is that membrane reactors are unsuitable for large-scale production due to the high cost of isolated enzymes, required cofactors and membranes.
- D-mannitol production is offered by a fermentative process, where yields of approx. 85% using D-fructose / D-glucose mixtures as substrates and the heterofermentative lactic acid bacterium Leuconostoc mesenteroides ATCC 12291 as a catalyzing organism in a fermentation with growing Cells were obtained (Soetaert (1991) Synthesis of D-mannitol and L-sorbose by microbial hydrogenation and dehydrogenation of monosaccharides. PhD Thesis, University of Gent)). The gene of the MDH from Leuconostoc pseudomesenteroides and its characterization is also known (J. Aarnikunnas et.
- mannitol-2-dehydrogenases Three further mannitol-2-dehydrogenases are known from the literature and are also described with regard to their biochemical properties and nucleotide / amino acid sequences. This includes the mannitol ⁇
- the object is achieved by a process for the production of D-mannitol by means of an organism expressing mannitol-2-dehydrogenase (MDH), the sugar substrates and / or sugar substrate precursors of the MDH being transported via a non-phosphorylating sugar transport system Organism are transported, solved.
- MDH mannitol-2-dehydrogenase
- the sugar to be reacted with the MDH can be converted directly to D-mannitol by the MDH without prior phosphorylation.
- This direct implementation surprisingly enables improved yields and concentrations of the D-mannitol in the reaction supernatant compared to the prior art.
- yields of up to 100% based on the substrate (glucose) are obtained with the process according to the invention.
- concentrations of up to 40 g / L are achieved with the method according to the invention.
- Organism means both unicellular and multicellular organisms, in particular microorganisms.
- the object is also achieved by a microorganism which expresses the enzymes MDH according to sequence No. 2 and FDH according to sequence No. 3 for the microbial production of D-mannitol and a non-phosphorylating sugar.
- Has transport system that transports the sugar substrates and / or sugar substrate precursors of the MDH into the microorganism.
- D-mannitol is also to be understood below as D-mannitol.
- nucleotide sequences that code for a formate dehydrogenase are summarized under the name "fcf j gene sequence”.
- the enzyme formate dehydrogenase is summarized below under the name "FDH”.
- nucleotide sequence is understood to mean all nucleotide sequences which (i) correspond exactly to the sequences shown; or (ii) comprise at least one nucleotide sequence that corresponds to the sequences shown within the range of degeneration of the genetic code; or (iii) comprises at least one nucleotide sequence which hybridizes with a nucleotide sequence which is complementary to the nucleotide sequence (i) or (ii), and optionally comprises (iiii) functionally neutral sense mutations in (i).
- function-neutral meaning mutations means the exchange of chemically similar amino acids, such as. B. glycine by alanine or serine by threonine.
- sequence regions preceding the coding regions are also included.
- sequence regions with a regulatory function are included here. They can be used for transcription, RNA
- regulatory sequences include promoters, enhancers, operators, terminators or translation enhancers.
- the respective enzymes also include isoforms which are understood as enzymes with the same or comparable substrate and activity specificity, but which have a different primary structure.
- modified forms are understood to mean enzymes in which there are changes in the sequence, for example at the N and / or C terminus of the polypeptide or in the region of conserved amino acids, but without impairing the function of the enzyme. These changes can be made in the form of amino acid exchanges using known methods.
- the sugar transport system is the glucose facilitator (GLF) according to nucleotide sequence no. 1, which preferably consists of a eukaryote e.g. B. comes from a yeast.
- German patent application 198 18 541.3 a method for producing substances from the aromatic metabolism is known, in which a microorganism is used which has an increased activity of a glucose-oxidizing enzyme and which oxidizes glucose or glucose-containing substrates Gluconolakton or gluconate and converted by phosphorylation of the gluconate to 6-phosphogluconate, whereby in addition to increasing the enzyme activity of the oxidase and / or the phosphatase to increase the amount of PEP present, the activity of a PEP-independent glucose transport protein is increased, which is can trade the Zymomonas mobilis glucose facilitator (GLF).
- GLF Zymomonas mobilis glucose facilitator
- the GLF can also transport glucose or xylose, of which glucose is particularly interesting as an inexpensive fructose precursor.
- the Glucose as will be described, can be converted to fructose.
- the sequence coding for MDH from microorganisms of the Lactobacteriaceae family, in particular Leuconostoc pseudomesenteroides, is particularly suitable for conversion to D-mannitol due to the high activity and stability of the MDH synthesized therefrom.
- the organism preferably expresses sequence No. 2 coding for MDH.
- Microorganisms from the genus Bacillus, Pseudomonas, Lactobacillus, Leuconostoc, Enterobacteriaceae or methylotrophic yeasts and fungi are particularly suitable as organisms. Furthermore, all microorganisms used in the food industry can also be used.
- the organism used particularly preferably comes from the group Achromobacter parvolus, Methylobacterium organophilum, Mycobacterium formicum, Pseudomonas spec. 101, Pseudomonas oxalaticus, Moraxella sp., Agrobacterium sp., Paracoccus sp., Ancylobacter aquaticus, Maxcobacterium vaccae, Pseudomonas fluorescens, Rhodobacter sphaeroides, Rhodobacter capsulatus, Lactobacillus sp., Lactobacillus brevis, Glucentomoxides, Leuconostoc boidinii, Candida methylica or also Hansenula polymorpha, Aspergillus nidulans or Neurospora crassa or in particular Escherichia coli or Bacillus subtilis.
- the analysis of the D-mannitol concentration can be carried out enzymatically / photometrically using the method of K. Horikoshi (Horikoshi K. (1963) Meth. Enzym. Analysis, 3rd ed. Vol. 6. HU Bergmeyer, ed., Verlag Chemie, Weinheim) , or by high pressure liquid chromatography (HPLC), as in Lindroth et al. (Lindroth et al. (1979) Analytical Chemistry 51: 1167-1174).
- a sequence coding for formate dehydrogenase (FDH) can be used to establish an oxidation-reduction cycle.
- FDH formate dehydrogenase
- This preferably comes from Mycobacterium vaccae and has a nucleotide sequence according to sequence no. 3. This is seen in isolation from K. Soda et al, Appl. Microbiol. Biotechnol (1995) 44, 479-483. This enables a considerable increase in the yield or the conversion rate of the fructose to mannitol substrate by creating a cofactor regeneration system.
- the substrate for the provision of the reduction equivalents necessary for the reduction of fructose to mannitol is no longer used, but is provided by a second enzyme system.
- the coenzyme NADH is increasingly available for the conversion to mannitol.
- One of the most commonly used systems is regeneration with a formate dehydrogenase, e.g. B. from Mycobacterium vaccae.
- This enzyme together with any MDH, preferably from Leuconostoc pseudomesenteroides, creates an oxidation-reduction cycle in which formate acts as an electron donor and D-fructose acts as an electron acceptor.
- the enzyme formate dehydrogenase catalyzes the oxidation of formate to CO 2 and the enzyme MDH the reduction of D-fructose to D-mannitol (see FIG. 1).
- the intracellular nicotinic acid amide adenine dinucleotide (NAD) pool serves as an electron shuttle between the two enzymes.
- the oxidation of formate to CO 2 is thermodynamically favorable, since the free standard formation energy ⁇ G 0 is clearly negative for CO 2 and the CO 2 is removed from the reaction equilibrium by outgassing.
- the increased intracellular NADH concentration resulting, among other things, from formate oxidation, increases the reducing power for the reduction of D-fructose to D-mannitol, catalyzed by MDH.
- D-glucose is used in addition to the carbon sources already mentioned as a substrate for the production.
- D-glucose can be converted to D-fructose by conversion with the enzyme D-glucose / xylose isomerase (EC 5.3.1.5) (2).
- the transformation is possible both inside and outside the organism.
- D-glucose as a substrate in a process for the production of D-mannitol brings about a significant improvement in the economy of the process.
- microorganisms suitable for the described method into which a formate dehydrogenase and an MDH are introduced and / or strengthened, but also microorganisms which already have a formate dehydrogenase or, if appropriate, an MDH, such as, for. B. Achromobacter parvolus, Methylobacterium organophilum, Mycobacterium formicum, Pseudomonas spec. 101, Pseudomonas oxalaticus, Moraxella sp., Agrobacterium sp., Paracoccus sp., Ancylobacter aquaticus.
- microorganisms such as Pseudomonas fluorescens, Rhodobacter sphaeroides, Rhodobacter capsulatus, Lactobacillus sp., Lactobacillus brevis, Gluconobacter oxydans and preferably also Leuconostoc pseudomesenteroides or microorganisms that already have both enzymes and are each enhanced in their activity.
- methylotrophic yeasts such as Candida boidinii, Candida methylica or also Hansenula polymorpha
- fungi such as Aspergillus nidulans and Neurospora crassa and all microorganisms also used in the food industry.
- the invention also includes the use of nucleotide sequences according to sequences Nos. 1, 2 and 3 coding for GLF, MDH and FDH for use in one of the microorganisms described above.
- the invention also includes a gene structure containing at least one or more of the above nucleotide sequences.
- a vector containing at least one or more of the above nucleotide sequences or one or more of the aforementioned gene structures is also included in the invention.
- the invention also includes the use of the aforementioned nucleotide sequences, gene structures and vectors in the microorganisms described or microorganisms that contain these nucleotide sequences, gene structures and vectors.
- Fig. 1 Oxidoreduction cycle with formate dehydrogenase and MDH schematically in a cell.
- Fig. 2 Derivation of a degenerate 24 base oligonucleotide probe from the N-terminal amino acid sequence of the MDH subunit from Leuconostoc pseudomesenteroides ATCC 12291.
- Sequence No. 1 shows the nucleotide sequence coding for GLF from Zymomonas mobilis.
- Sequence No. 2 shows the nucleotide sequence coding for MDH from Leuconostoc pseudomesenteroides.
- Sequence No. 3 shows the nucleotide sequence coding for FDH from Mycobacterium vaccae N10.
- ATCC 12291 purification and characterization of the enzyme; Cloning and functional expression of the mdh gene in Escherichia coli
- Leuconostoc pseudomesenteroides ATCC 12291 was used as the source for the isolation of the MDH.
- E. coli JM 109 (DE 3) (Promega) served as the host organism for the production of a partial plasmid bank for the isolation of the genomic DNA from Leuconostoc pseudomesenteroides ATCC 12291.
- a part of the plasmid bank was genomically made by ligation of a 4.0 - 4.5 kb Eco Rl fragment DNA prepared from Leuconostoc pseudomesenteroides ATCC 12291 in pUC18.
- E. coli JM109 (DE 3) was run at 170 rpm at 37 ° C in Luria-Bertani medium with the addition of ampicillin (100 ⁇ g / ml) or carbenicillin (50 ⁇ g / ml) cultured.
- the enzyme activity is measured photometrically via the decrease in the NADH concentration for the reduction reaction D-fructose + NADH + H + -> D-mannitol + NAD + certainly.
- the approach for measuring the activity of the MDH contained 200 ⁇ M NADH and 200 mM D-fructose in 100 mM potassium phosphate buffer at pH 6.5.
- the specific activities of the crude extracts and the partially purified enzyme isolates are given as units per milligram of protein (U / mg), 1 U being defined as 1 ⁇ mol substrate decrease per minute.
- a 2048-fold degenerate oligonucleotide probe for the detection of the mannitol-2-dehydrogenase gene on genomic DNA was derived from Leuconostoc pseudomesenteroides ATCC 12291 (see FIG. 2).
- the 24 bp DNA probe was provided with a digoxigenin-11 dUTP tail at the 3 'end and was used for the immunoscreening of partial plasmid banks of genomic DNA from L. pseudomesenteroides ATCC 12291. 2 kb DNA fragment isolated (Fig. 3).
- the mdh gene from this fragment was amplified with suitable primers, ligated into the vector pET24a (+) and transformed and expressed in E. coli BL21 (DE3).
- Cell extracts from E. coli BL21 (DE3) pET24a (+) Lm ⁇ 77 showed a strong overexpression band at 43 kDa and specific activity of mannitol-2-dehydrogenase of 70 U / mg protein after induction in SDS polyacrylic electrophoresis, while the controls (cells without plasmid, cells with empty plasmid) showed no activity.
- nucleotide sequence of the mdh gene from L. pseudomesenteroides ATCC 12291 is shown in Sequence No. 2.
- the enzymes formate dehydrogenase (EC 1.2.1.2) and mannitol 2-dehydrogenase (EC 1.1.1.67) were overexpressed in a recombinant E. coli strain in order to establish an oxidation-reduction cycle in the cells.
- hydrogen is transferred from formate via cellular NAD + to D-fructose, whereby D-fructose is reduced to D-mannitol (see FIG. 1).
- the glucose facilitator was expressed in the cells in order to improve the availability of the substrate fructose.
- the strains E. coli BL21 (DE3) Star (Invitrogen) were used.
- the vectors used were pET-24a (+) fo , / 7 / md /?, Coding for the ORF of the formate Dehydrogenase from Mycobacterium vaccae, the mannitol-2-dehydrogenase from Leuconostoc pseudomesenteroides and coding for pZY507g / f for the glucose facilitator from Zymomonas mobilis.
- E. coli BL21 (DE 3) star was co-transformed with pET-24a (+) f ⁇ n ⁇ 77 and pZY507g / f and selected on LB agar plates with 25 ⁇ g / ml chloramphenicol and 30 ⁇ g / ml kanamycin.
- E. coli BL21 (DE 3) Star was transformed with either pET-24a (+) f ⁇ nc / 7 or pZY507g / f alone.
- the transformants were selected on LB agar plates with either 25 ⁇ g / ml chloramphenicol (pZY507g / f) or with 50 ⁇ g / ml kanamycin (pET-24a (+) ft / ⁇ mcfh).
- LB agar plates for E. coli BL21 (DE 3) Star transformed with p pET-24a (+) fcftVrr? O77 additionally contained 1% (v / v) D-glucose to reduce the basal expression of mannitol-2-dehydrogenase and the formate -Dehydrogenas.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10247147 | 2002-10-09 | ||
DE10247147A DE10247147A1 (de) | 2002-10-09 | 2002-10-09 | Verfahren sowie Mikroorganismus zur Herstellung von D-Mannitol |
PCT/EP2003/011191 WO2004033676A1 (de) | 2002-10-09 | 2003-10-09 | Verfahren sowie mikroorganismus zur herstellung von d-mannitol |
Publications (1)
Publication Number | Publication Date |
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EP1549744A1 true EP1549744A1 (de) | 2005-07-06 |
Family
ID=32038413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP03757939A Withdrawn EP1549744A1 (de) | 2002-10-09 | 2003-10-09 | Verfahren sowie mikroorganismus zur herstellung von d-mannitol |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1549744A1 (de) |
JP (1) | JP2006503559A (de) |
AU (1) | AU2003273972A1 (de) |
CA (1) | CA2501391A1 (de) |
DE (1) | DE10247147A1 (de) |
WO (1) | WO2004033676A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009046456A (ja) * | 2007-08-23 | 2009-03-05 | Kikkoman Corp | 生殖行動の誘発用組成物 |
CN102197135B (zh) | 2008-11-05 | 2014-08-13 | 三井化学株式会社 | 生产2-脱氧蟹肌醇(doi)的细菌及使用其生产2-脱氧蟹肌醇(doi)的方法 |
US9902981B2 (en) | 2012-02-07 | 2018-02-27 | Annikki Gmbh | Process for the production of furan derivatives from glucose |
CN105102626B (zh) | 2013-03-27 | 2019-01-01 | 安尼基有限责任公司 | 葡萄糖异构化的方法 |
BR112018072410A2 (pt) | 2016-05-23 | 2019-02-12 | Annikki Gmbh | processo para a conversão enzimática de d-glicose em d-frutose por meio de d-sorbitol |
JP7133472B2 (ja) * | 2016-12-15 | 2022-09-08 | 三菱商事ライフサイエンス株式会社 | 乳酸菌発酵調味料 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1023896A (ja) * | 1996-05-07 | 1998-01-27 | Unitika Ltd | 組換えプラスミド、それにより形質転換された大腸菌、その培養物及びそれを用いたアミノ酸又はその誘導体の製造方法 |
FI981615A0 (fi) * | 1998-07-15 | 1998-07-15 | Xyrofin Oy | Mannitolin valmistusmenetelmä immobilisoituja mikro-organismeja käyttäen |
FI20002792A0 (fi) * | 2000-12-20 | 2000-12-20 | Hydrios Biotechnology Oy | Menetelmä D-mannitolin tuottamiseksi |
DE10220848A1 (de) * | 2002-05-08 | 2003-12-04 | Forschungszentrum Juelich Gmbh | Für eine Mannitol-2-Dehydrogenase codierende Nukleotidsequenz sowie Verfahren zur Herstellung von D-Mannitol |
-
2002
- 2002-10-09 DE DE10247147A patent/DE10247147A1/de not_active Ceased
-
2003
- 2003-10-09 EP EP03757939A patent/EP1549744A1/de not_active Withdrawn
- 2003-10-09 WO PCT/EP2003/011191 patent/WO2004033676A1/de not_active Application Discontinuation
- 2003-10-09 CA CA002501391A patent/CA2501391A1/en not_active Abandoned
- 2003-10-09 AU AU2003273972A patent/AU2003273972A1/en not_active Abandoned
- 2003-10-09 JP JP2004542472A patent/JP2006503559A/ja active Pending
Non-Patent Citations (1)
Title |
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See references of WO2004033676A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003273972A1 (en) | 2004-05-04 |
JP2006503559A (ja) | 2006-02-02 |
WO2004033676A1 (de) | 2004-04-22 |
DE10247147A1 (de) | 2004-04-22 |
CA2501391A1 (en) | 2004-04-22 |
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