EP1095153A1 - Biologische tagatoseherstellung durch rekombinante escherichia coli - Google Patents
Biologische tagatoseherstellung durch rekombinante escherichia coliInfo
- Publication number
- EP1095153A1 EP1095153A1 EP99954465A EP99954465A EP1095153A1 EP 1095153 A1 EP1095153 A1 EP 1095153A1 EP 99954465 A EP99954465 A EP 99954465A EP 99954465 A EP99954465 A EP 99954465A EP 1095153 A1 EP1095153 A1 EP 1095153A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tagatose
- coli
- galactose
- recombinant
- arabinose isomerase
- 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- Withdrawn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
- C12N9/90—Isomerases (5.)
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/70—Vectors or expression systems specially adapted for E. coli
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/52—Genes encoding for enzymes or proenzymes
-
- 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
- C12P19/24—Preparation of compounds containing saccharide radicals produced by the action of an isomerase, e.g. fructose
Definitions
- the present invention relates to a novel recombinant E. coli, a fermentation process and a enzymatic conversion process for tagatose production using such recombinant E. ⁇ li harboring vector containing the gene of L-arabinose isomerase, and the promoter controlled artificially.
- D-Tagatose is one of ketohexoses as well as one of D-galactose isomers. D-Tagatose is reported as the sweetener having the taste most similar to that of sucrose (92%). In addition, D-tagatose does not show laxative effect, which other polyols generally do. Due to such reasons, D-tagatose has been recently regarded as a non-caloric sweetener substituted by sucrose [Zehener, L. R., D-Tagatose as a low-calorie carbohydrate sugar and bulking agent, EP 257626 (1988) ; Marzur, A. W., Functional sugar substitutes with reduced calories, EP 341062 (1989)].
- D-Galactose could be converted into D-tagatose in the presence of a calcium catalyst [Beadle, J. R., Saunders, J. P., and Wajda, T. J., Process for manufacturing tagatose, WO 92/12263 (1992)].
- a calcium catalyst Beadle, J. R., Saunders, J. P., and Wajda, T. J., Process for manufacturing tagatose, WO 92/12263 (1992)
- the chemical synthesis is economical, this process also requires disadvantageous high temperature and high pressure.
- the biological process has been researched with interest as an environmentally clean process. As a consequence, the biological production of D-tagatose has been intensively studied recently.
- L-arabinose isomerase (AraA) could convert galactose into tagatose.
- Cheetham reported that L-arabinose isomerase from Mycobacterium and Lactobacillus catalyzes the conversion from D-galactose to D-tagatose as well as that of from L-arabinose to L-ribulose, because of the similar substrate configuration [Cheetham, P. S. J., and Wootton, A. N., "Byconversion of D-galactose into D-tagatose", Enzyme Microbiol. Technol, 15, 105-108 (1993)].
- Enterobacter agglomerans could also produce tagatose from galactose during the growth on the arabinose pre-induced medium. Such implies the fact that arabinose isomerase could mediate the conversion of tagatose [Kim, S. Y., Roh, H. J., and Oh, D. K., "D-Tagatose production from D-galactose by Enterobacter agglomerans TY-25", Kor. ]. Appl. Microbiol. Biotechnol, 25, 490-494 (1997)].
- the object of the present invention is to provide a recombinant E.coli having a new metabolic pathway for producing tagatose from galactose.
- Another object of the present invention is to provide new method for tagatose production by using said recombinant E.coli.
- the further object of the present invention is to provide a new method for tagatose production by using the L-arabinose isomerase originated from said recombinant E.coli.
- the present invention relates to a recombinant E.coli (KCTC-0603BP) harboring vector comprising i ) the gene of L-arabinose isomerase (EC 5.3.1.4; araA) and ii ) the promoter controlled artificially (pTClOl) for tagatose production.
- araA is originated from the group consisting of E.coli, Bacillus, Salmonella, Enterobacter, Klebsiella, Pseudomonas, Lactobacillus, Zymononas, Ghiconobacter, RJtizobium, Acetobacter, RJwdobacter, Agrobacterium, and other microorganisms. Further, araA is integrated into the host chromosome.
- the another aspect of the present invention relates to a fermentation process for tagatose production wherein the medium comprises 10-300 g/L of galactose, 7-13 g/L of yeast extract, 2-4 g/L of KH 2 P0 4 5-7 g/L of Na 2 HP ⁇ 4 and 1-3 g/L of ammonium chloride.
- L-arabinose isomerase from said strain mediates galactose to tagatose conversion.
- the L-arabinose isomerase can be immobilized for the recycle.
- the conversion medium comprises 10-500 g/L of galactose, 2-4 g/L of KH2PO 4 , and 5-7 g/L of Na 2 HP0 4 .
- Fig. 1 is a chemical structure of D-tagatose and D-galactose.
- Fig. 2 is a schematic diagram of bioconversion by L-arabinose isomerase.
- Fig. 3 is a photograph which represents PCR product of L-arabinose isomerase from E.coli. Arrow indicates the PCR product of Ara A from E.coli (1.5 kb). Lane 1 shows the size marker (lkb DNA Ladder, NEB, USA).
- Fig. 4 is a plasmid map of pTClOl, which harboring L-arabinose isomerase.
- Fig. 5 is a photograph which represents EcoRl-Hindl ⁇ double digest of pTClOl. Arrow indicates the pTClOl. Lane 1 shows the size marker (lkb DNA Ladder, NEB, USA).
- Fig. 6 is a profile of tagatose production by purified L-arabinose isomerase.
- D-Tagatose is a potential bulking agent in food as a non-caloric sweetener.
- plasmids harboring the L-arabinose isomerase gene (araA) from Esdierichia coli is constructed because L-arabinose isomerase has been suggested as an enzyme that mediates the bioconversion of galactose to tagatose as well as that of arabinose to ribulose.
- the constructed plasmids has been named as pTClOl, which contains the araA from E.coli.
- tagatose has been produced from galactose in 9.0—11.0 % yields.
- the purified L-arabinose isomerase of E.coli with the plasmid pTClOl has also produced 25—35 g/L of tagatose from 100 g/L of galactose for 150 —180 hours bioconversion.
- the enzyme extract of E.coli with the plasmid pTClOl has been immobilized into alginate bead. By using an immobilized enzyme system, 11 —14 g/L of tagatose has been produced from 10 % galactose for 24 hours.
- E.coli is a Gram negative facultative anaerobic rod-form bacteria [Holt J. G., et. al, Bergey's Manual of Systematic Bacteriology 9th ed., 179, Williams & Wilkins (1994)]. It shows simple nutrient requirement, fast life cycle (about 20 min) in the optimal condition (pH 7.0, 37°C) [Stanier R. Y., et. al, The Microbiol World, 5th ed., 439 - 452(1986)].
- E.coli is the most well known organism in physiology and genetics. Therefore, metabolism of E.coli can be easily controlled by the methods of genetic engineering and metabolic engineering.
- the gene of L-arabinose isomerase (araA) of E.coli W3110 has been cloned by using a PCR technique, inserted into vector pKK223-3, which yields pTClOl.
- the constructed plasmids harboring araA from E.coli has been used to transform E.coli JM105 (E.coli JM105/pTC101).
- ImM IPTG was added to medium.
- AraA L-Arabinose isomerase
- the normal E.coli does not express AraA in the medium for tagatose production because the medium contains galactose as a sole carbon source.
- the AraA could be artificially induced by adding an IPTG.
- E.coli JM105/pTC101 was deposited in Korean Collection for Type Cultures in Korea Research Institute of Bioscience and Bioengineering, in accession number of KCTC-0603BP on April 26, 1999 under Budapest Treaty.
- Step 1 PCR cloning of araA and Insertion into Expression Vector
- the template for PCR of araA was chromosome of a wild type E.coli W3110 [Genetic stock center collection number (CGSC) 4474],
- the each primer used in PCR contained the part of araA terminal sequence and restriction enzyme site (EcoRI and Hi ⁇ rflll, respectively).
- FORWARD 5'-GACGAATTCATGACGATT-3' (SEQ ID NO. 1)
- BACKWARD 5'-TGCAAGCTTTTAGCGACG-3' (SEQ ID NO. 2)
- PCR product sequence (SEQ ID NO. 3) is as follows.
- the constructed plasmid was transformed into E.coli JM105 [Roh, H. J., Kim, P., Park Y. C, and Choi, J. H., Biotechnol and Appl. Biochem., BA99/65, in press] (Fig.4).
- Step 2 Strain Selection
- the transformed strains were selected on the plate containing ampicillin (50g/ml) on the base of ampicillin-resistance. The colonies were further confirmed by restriction enzyme which digests the harbored plasmids, which shows 1.5 kb + 4.5 kb DNA fragments at the time of digestion by EcoRI and HmdIII (Fig. 5). The finally selected strain was named as E.coli JM105/pCT101, and said E.coli JM105/pTC101 was deposited in Korean Collection for Type Cultures in Korea Research Institute of Bioscience and Bioengineering, in accession number of KCTC-0603BP on April 26, 1999 under Budapest Treaty.
- the E.coli JM105/pTC101 was pre-cultured in the LB-medium, and then transferred into main culture medium.
- the main medium contained following components (Table 1).
- Tagatose and galactose were estimated by using a HPLC (alliance 2690, Waters, USA) with RI detector (RID410, Waters, USA). The separation was made by C18-amine column (KR100-10NH 2 , Kromasil, Bohus, Sweden) eluted isocratically by 80% acetonitrile (35°C, 2 ml/min).
- recombinant E.coli expressing L-arabinose isomerase could convert galactose into tagatose, where control strain could not.
- a crude extract of AraA from E.coli was prepared as follows. Actively growing cells (50 ml, O.D. 600 2.0) in the LB-medium containing IPTG (1 mM) were prepared by centrifugation (7,000 g, 4°C). The cell pellet was resuspended in a 5 ml of phosphate buffer (50 mM, pH 7.0). The cells were disrupted by using an ultrasonic processor (50-watt Model, Cole-Parmer) at 40% output for 10 min in the ice. The crude arabinose isomerase solution was obtained after removal of cell-debris by centrifugation of the cell-disrupted suspension at 7,000 g and 4"C for 15 min.
- a crude extract of AraA was fractionated by ammonium sulfate salting out at 40-60% saturation, and pelleted by centrifuge (10,000g, 4°C). The pellet was further dialyzed overnight at 4°C using a cellulose membrane tubing (MWCO : 12,000, Sigma, USA) to remove ammonium sulfate. Column chromatography was further carried out using DEAE (Sigma, USA) and Q-Sepharose (Sigma, USA) as anion exchange resins. The final purified L-arabinose isomerase showed 43 U/ml, where one unit defined as the amount of enzyme which produced 1 g-tagatose per minute at 35 °C, pH 7.0.
- the reaction mixtures consisted of 9 ml of galactose (1 g) dissolved in 50mM phosphate buffer (pH 7.0) and 1 ml of enzyme solution mentioned the above.
- the bioconversion for tagatose production was performed at 35 °C, pH 7.0 for 168 hrs. As shown in Fig. 6, the final tagatose concentration was reached 29.5 g/L. Remained galactose was 70.5 g/L.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Enzymes And Modification Thereof (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR19990016118A KR100309327B1 (ko) | 1999-05-06 | 1999-05-06 | 아라비노스 이성화효소를 포함한 재조합 대장균주와 이를 이용한타가토스의 생산방법 |
KR9916118 | 1999-05-06 | ||
PCT/KR1999/000661 WO2000068397A1 (en) | 1999-05-06 | 1999-11-04 | Biological tagatose production by recombinant escherichia coli |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1095153A1 true EP1095153A1 (de) | 2001-05-02 |
Family
ID=19583888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99954465A Withdrawn EP1095153A1 (de) | 1999-05-06 | 1999-11-04 | Biologische tagatoseherstellung durch rekombinante escherichia coli |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1095153A1 (de) |
KR (1) | KR100309327B1 (de) |
AU (1) | AU1080600A (de) |
WO (1) | WO2000068397A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052021A1 (en) * | 2000-12-22 | 2002-07-04 | Yu Ryang Pyun | Thermostable l-arabinose isomerase and process for preparing d-tagatose thereby |
US7052898B2 (en) | 2001-07-16 | 2006-05-30 | Bioneer A/S | Thermostable isomerase and use hereof, in particular for producing tagatose |
ES2314088T3 (es) * | 2001-07-16 | 2009-03-16 | Bioneer A/S | Una isomerasa termoestable y su uso, en particular para producir tagatosa. |
KR100464061B1 (ko) * | 2002-05-15 | 2004-12-30 | (주)케비젠 | 아라비노스 이성화효소의 고정화에 의한 타가토스의 생산방법 |
US20060270013A1 (en) | 2003-02-18 | 2006-11-30 | Michel Chateau | Method for the production of evolved microorganisms which permit the generation or modification of metabolic pathways |
US8137946B2 (en) | 2006-11-27 | 2012-03-20 | Cj Cheiljedang Corporation | Recombinant GRAS strains expressing thermophilic arabinose isomerase as an active form and method of preparing food grade tagatose by using the same |
KR20100001209A (ko) * | 2008-06-26 | 2010-01-06 | 한국화학연구원 | 갈락토오스 이용이 억제된 미생물을 이용한 타가토오즈제조방법 |
KR101015343B1 (ko) | 2008-08-05 | 2011-02-16 | 씨제이제일제당 (주) | 효소 활성이 향상된 아라비노스 이성화효소 변이체 |
US10570467B1 (en) | 2016-09-27 | 2020-02-25 | The Board Of Trustees Of The University Of Illinois | Recombinant microorganisms for conversion of oligosaccharides into functional sweeteners |
KR101979213B1 (ko) * | 2016-12-23 | 2019-05-17 | 경북대학교 산학협력단 | 변형된 당 대사 경로를 갖는 재조합 균주 및 이를 이용한 당이성화 효소의 스크리닝 방법 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6057135A (en) * | 1992-01-16 | 2000-05-02 | Kraft Foods, Inc. | Process for manufacturing D-tagatose |
JP3252295B2 (ja) * | 1992-10-08 | 2002-02-04 | 株式会社林原生物化学研究所 | L−ガラクトースの製造方法 |
-
1999
- 1999-05-06 KR KR19990016118A patent/KR100309327B1/ko not_active IP Right Cessation
- 1999-11-04 AU AU10806/00A patent/AU1080600A/en not_active Abandoned
- 1999-11-04 EP EP99954465A patent/EP1095153A1/de not_active Withdrawn
- 1999-11-04 WO PCT/KR1999/000661 patent/WO2000068397A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0068397A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR100309327B1 (ko) | 2001-09-29 |
AU1080600A (en) | 2000-11-21 |
WO2000068397A1 (en) | 2000-11-16 |
KR20000073075A (ko) | 2000-12-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8216818B2 (en) | Ketose 3-epimerase, its preparation and uses | |
TWI682998B (zh) | 用於生產塔格糖的組成物及利用其生產塔格糖的方法 | |
CA2653028C (en) | Method for the enzymatic production of 2-hydroxy-2-methyl carboxylic acids | |
Roh et al. | Bioconversion of D‐galactose into D‐tagatose by expression of L‐arabinose isomerase | |
JP2020511986A (ja) | タガトース生産用組成物及びこれを用いたタガトースの製造方法 | |
JP2020511974A (ja) | タガトース生産用組成物及びこれを用いたタガトースの製造方法 | |
EP1095153A1 (de) | Biologische tagatoseherstellung durch rekombinante escherichia coli | |
KR102044957B1 (ko) | 사이코스의 제조방법 | |
USRE29692E (en) | Process of preparing glucose isomerase | |
CN111411066B (zh) | 一种双途径复合产神经氨酸枯草芽孢杆菌及构建方法 | |
JP2000295994A (ja) | キシリトールの製造法 | |
US8852891B2 (en) | N-acetylglucosamine-2-epimerase and method for producing CMP-neuraminic acid using the same | |
EP0251489A2 (de) | Verfahren zur Herstellung von 5'-Guanyl-Säure | |
US20030235894A1 (en) | Biological tagatose production by recombinant Escherichia coli | |
WO2002072841A1 (fr) | Adn codant pour une hydantoinase, adn codant pour une hydrolase d'acide amine l carbamyle, adn recombinant, cellules transformees, procede de production de proteine et procede de production d'acide amine optiquement actif | |
JPH08263A (ja) | マルトースをトレハロースに変換する組換え型酵素 | |
WO2005047510A1 (en) | A noble geobacillus thermodenitrificans cbg-a1 strain expressing thermostable l-arabinose isomerase activity, the said enzyme and tagatose-production method | |
KR100464061B1 (ko) | 아라비노스 이성화효소의 고정화에 의한 타가토스의 생산방법 | |
KR100821377B1 (ko) | 내열성 아라비노오스 이성화효소 활성을 갖는 신규한지오바실러스 더모디니트리피컨스 CBG-Al 균주, 그 효소 및타가토오스의 생산방법 | |
CN115261350B (zh) | 一种淀粉蔗糖酶的突变体及其在生产α-熊果苷中的应用 | |
CN113493760B (zh) | 一种生物合成2-苯乙醇的谷氨酸棒杆菌、构建方法及应用 | |
EP1121446A1 (de) | Aminoacylase und seiner verwendung zur herstellung von d-aminosäuren | |
JP4439153B2 (ja) | 耐熱性マンノースイソメラーゼ及び該酵素を用いたマンノースの製造法 | |
CN116064346A (zh) | 一种高效合成乳糖的方法及其应用 | |
CN116426501A (zh) | 一种gdp-d-甘露糖水解酶突变体及其应用 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010122 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 20031205 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB IT LI NL |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20040416 |