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Jiang W, Cai Y, Sun S, Wang W, Tišma M, Baganz F, Hao J. Inactivation of hydrogenase-3 leads to enhancement of 1,3-propanediol and 2,3-butanediol production by Klebsiella pneumoniae. Enzyme Microb Technol 2024; 177:110438. [PMID: 38518554 DOI: 10.1016/j.enzmictec.2024.110438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/16/2024] [Accepted: 03/17/2024] [Indexed: 03/24/2024]
Abstract
Klebsiella pneumoniae can use glucose or glycerol as carbon sources to produce 1,3-propanediol or 2,3-butanediol, respectively. In the metabolism of Klebsiella pneumoniae, hydrogenase-3 is responsible for H2 production from formic acid, but it is not directly related to the synthesis pathways for 1,3-propanediol and 2,3-butanediol. In the first part of this research, hycEFG, which encodes subunits of the enzyme hydrogenase-3, was knocked out, so K. pneumoniae ΔhycEFG lost the ability to produce H2 during cultivation using glycerol as a carbon source. As a consequence, the concentration of 1,3-propanediol increased and the substrate (glycerol) conversion ratio reached 0.587 mol/mol. Then, K. pneumoniae ΔldhAΔhycEFG was constructed to erase lactic acid synthesis which led to the further increase of 1,3-propanediol concentration. A substrate (glycerol) conversion ratio of 0.628 mol/mol in batch conditions was achieved, which was higher compared to the wild type strain (0.545 mol/mol). Furthermore, since adhE encodes an alcohol dehydrogenase that catalyzes ethanol production from acetaldehyde, K. pneumoniae ΔldhAΔadhEΔhycEFG was constructed to prevent ethanol production. Contrary to expectations, this did not lead to a further increase, but to a decrease in 1,3-propanediol production. In the second part of this research, glucose was used as the carbon source to produce 2,3-butanediol. Knocking out hycEFG had distinct positive effect on 2,3-butanediol production. Especially in K. pneumoniae ΔldhAΔadhEΔhycEFG, a substrate (glucose) conversion ratio of 0.730 mol/mol was reached, which is higher compared to wild type strain (0.504 mol/mol). This work suggests that the inactivation of hydrogenase-3 may have a global effect on the metabolic regulation of K. pneumoniae, leading to the improvement of the production of two industrially important bulk chemicals, 1,3-propanediol and 2,3-butanediol.
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Affiliation(s)
- Weiyan Jiang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yaoyu Cai
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shaoqi Sun
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Wenqi Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Marina Tišma
- Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, Franje Kuhača 18, Osijek HR-31000, Croatia
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK; University of Chinese Academy of Sciences, Beijing 100049, PR China.
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2
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Wang Q, Jiang W, Cai Y, Tišma M, Baganz F, Shi J, Lye GJ, Xiang W, Hao J. 2-Hydroxyisovalerate production by Klebsiella pneumoniae. Enzyme Microb Technol 2024; 172:110330. [PMID: 37866134 DOI: 10.1016/j.enzmictec.2023.110330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/14/2023] [Accepted: 09/28/2023] [Indexed: 10/24/2023]
Abstract
2-Hydroxyisovalerate is a valuable chemical that can be used in the production of biodegradable polyesters. In nature, it was only produced at a very low level by Lactococcus lactis. 2-Ketoisovalerate is an intermediate metabolite of the branched-chain amino acid biosynthesis pathway, and Klebsiella pneumoniae ΔbudAΔldhA (Kp ΔbudAΔldhA) was a 2-ketoisovalerate producing strain. In this research, 2-hydroxyisovalerate was identified as a metabolite of Kp ΔbudAΔldhA, and its synthesis pathway was revealed. It was found that 2-ketoisovalerate and 2-hydroxyisovalerate were produced by Kp ΔbudA and Kp ΔbudAΔldhA, but not by Kp ΔbudAΔldhAΔilvD in which the 2-ketoisovalerate synthesis was blocked. budA, ldhA, and ilvD encode α-acetolactate decarboxylase, lactate dehydrogenase, and dihydroxy acid dehydratase, respectively. Thus, it was deduced that 2-hydroxyisovalerate was synthesized from 2-ketoisovalerate. Isoenzymes of ketopantoate reductase PanE, PanE2, and IlvC were suspected of being responsible for this reaction. Kinetic parameters of these enzymes were detected, and they all hold the 2-ketoisovalerate reductase activities. PanE and PanE2 use both NADH and NADPH as co-factors. While IlvC only uses NADH as a co-factor. Over-expression of panE, panE2, or ilvC in Kp ΔbudAΔldhA all enhanced the production of 2-hydroxyisovalerate. Accordingly, 2-hydroxyisovalerate levels were reduced by knocking out panE or panE2. In fed-batch fermentation, 14.41 g/L of 2-hydroxyisovalerate was produced by Kp ΔbudAΔldhA-panE, with a substrate conversion ratio of 0.13 g/g glucose.
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Affiliation(s)
- Qinghui Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, People's Republic of China; Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, People's Republic of China
| | - Weiyan Jiang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yaoyu Cai
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Marina Tišma
- Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, Franje Kuhača 18, Osijek HR-31000, Croatia
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK
| | - Jiping Shi
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, People's Republic of China
| | - Gary J Lye
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, People's Republic of China
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, People's Republic of China; Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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Yang C, Yang M, Zhao W, Ding Y, Wang Y, Li J. Establishing a Klebsiella pneumoniae-Based Cell-Free Protein Synthesis System. Molecules 2022; 27:molecules27154684. [PMID: 35897861 PMCID: PMC9330377 DOI: 10.3390/molecules27154684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/25/2022] [Accepted: 07/18/2022] [Indexed: 02/01/2023] Open
Abstract
Cell-free protein synthesis (CFPS) systems are emerging as powerful platforms for in vitro protein production, which leads to the development of new CFPS systems for different applications. To expand the current CFPS toolkit, here we develop a novel CFPS system derived from a chassis microorganism Klebsiella pneumoniae, an important industrial host for heterologous protein expression and the production of many useful chemicals. First, we engineered the K. pneumoniae strain by deleting a capsule formation-associated wzy gene. This capsule-deficient strain enabled easy collection of the cell biomass for preparing cell extracts. Then, we optimized the procedure of cell extract preparation and the reaction conditions for CFPS. Finally, the optimized CFPS system was able to synthesize a reporter protein (superfolder green fluorescent protein, sfGFP) with a maximum yield of 253 ± 15.79 μg/mL. Looking forward, our K. pneumoniae-based CFPS system will not only expand the toolkit for protein synthesis, but also provide a new platform for constructing in vitro metabolic pathways for the synthesis of high-value chemicals.
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Affiliation(s)
- Chen Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
| | - Miaomiao Yang
- Clinical Pathology Center, The Fourth Affiliated Hospital of Anhui Medical University, Hefei 230012, China;
- Department of Biological Physics, University of Science and Technology of China, Hefei 230026, China
| | - Wanhua Zhao
- College of Life Sciences, Jiangxi Agricultural University, Nanchang 330045, China; (W.Z.); (Y.D.)
| | - Yue Ding
- College of Life Sciences, Jiangxi Agricultural University, Nanchang 330045, China; (W.Z.); (Y.D.)
| | - Yu Wang
- College of Life Sciences, Jiangxi Agricultural University, Nanchang 330045, China; (W.Z.); (Y.D.)
- Correspondence: (Y.W.); (J.L.)
| | - Jian Li
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;
- Correspondence: (Y.W.); (J.L.)
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Wang Q, Gu J, Shu L, Jiang W, Mojovic L, Knezevic-Jugovic Z, Shi J, Baganz F, Lye GJ, Xiang W, Hao J. Blocking the 2,3-butanediol synthesis pathway of Klebsiella pneumoniae resulted in L-valine production. World J Microbiol Biotechnol 2022; 38:81. [PMID: 35348886 DOI: 10.1007/s11274-022-03266-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/14/2022] [Indexed: 11/24/2022]
Abstract
Klebsiella pneumoniae is a 2,3-butanediol producing bacterium. Nevertheless, a design and construction of L-valine production strain was studied in this paper. The first step of 2,3-butanediol synthesis and branched-chain amino acid synthesis pathways share the same step of α-acetolactate synthesis from pyruvate. However, the two pathways are existing in parallel and do not interfere with each other in the wild-type strain. A knockout of budA blocked the 2,3-butanediol synthesis pathway and resulted in the L-valine production. The budA coded an α-acetolactate decarboxylase and catalyzed the acetoin formation from α-acetolactate. Furthermore, blocking the lactic acid synthesis by knocking out of ldhA, which is encoding a lactate dehydrogenase, improved the L-valine synthesis. 2-Ketoisovalerate is the precursor of L-valine, it is also an intermediate of the isobutanol synthesis pathway, while indole-3-pyruvate decarboxylase (ipdC) is responsible for isobutyraldehyde formation from 2-ketoisovalerate. Production of L-valine has been improved by knocking out of ipdC. On the other side, the ilvE, encoding a transaminase B, reversibly transfers one amino group from glutamate to α-ketoisovalerate. Overexpression of ilvE exhibited a distinct improvement of L-valine production. The brnQ encodes a branched-chain amino acid transporter, and L-valine production was further improved by disrupting brnQ. It is also revealed that weak acidic and aerobic conditions favor L-valine production. Based on these findings, L-valine production by metabolically engineered K. pneumonia was examined. In fed-batch fermentation, 22.4 g/L of L-valine was produced by the engineered K. pneumoniae ΔbudA-ΔldhA-ΔipdC-ΔbrnQ-ilvE after 55 h of cultivation, with a substrate conversion ratio of 0.27 mol/mol glucose.
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Affiliation(s)
- Qinghui Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, People's Republic of China.,Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Jinjie Gu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Lin Shu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Weiyan Jiang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Ljiljana Mojovic
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | | | - Jiping Shi
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK
| | - Gary J Lye
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin, 150030, People's Republic of China.
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China. .,Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK.
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Sun S, Shu L, Lu X, Wang Q, Tišma M, Zhu C, Shi J, Baganz F, Lye GJ, Hao J. 1,2-Propanediol production from glycerol via an endogenous pathway of Klebsiella pneumoniae. Appl Microbiol Biotechnol 2021; 105:9003-9016. [PMID: 34748036 DOI: 10.1007/s00253-021-11652-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 09/08/2021] [Accepted: 10/18/2021] [Indexed: 01/05/2023]
Abstract
Klebsiella pneumoniae is an important microorganism and is used as a cell factory for many chemicals production. When glycerol was used as the carbon source, 1,3-propanediol was the main catabolite of this bacterium. K. pneumoniae ΔtpiA lost the activity of triosephosphate isomerase and prevented glycerol catabolism through the glycolysis pathway. But this strain still utilized glycerol, and 1,2-propanediol became the main catabolite. Key enzymes of 1,2-propanediol synthesis from glycerol were investigated in detail. dhaD and gldA encoded glycerol dehydrogenases were both responsible for the conversion of glycerol to dihydroxyacetone, but overexpression of the two enzymes resulted in a decrease of 1,2-propanediol production. There are two dihydroxyacetone kinases (I and II), but the dihydroxyacetone kinase I had no contribution to dihydroxyacetone phosphate formation. Dihydroxyacetone phosphate was converted to methylglyoxal, and methylglyoxal was then reduced to lactaldehyde or hydroxyacetone and further reduced to form 1,2-propanediol. Individual overexpression of mgsA, yqhD, and fucO resulted in increased production of 1,2-propanediol, but only the combined expression of mgsA and yqhD showed a positive effect on 1,2-propanediol production. The process parameters for 1,2-propanediol production by Kp ΔtpiA-mgsA-yqhD were optimized, with pH 7.0 and agitation rate of 350 rpm found to be optimal. In the fed-batch fermentation, 9.3 g/L of 1,2-propanediol was produced after 144 h of cultivation, and the substrate conversion ratio was 0.2 g/g. This study provides an efficient way of 1,2-propanediol production from glycerol via an endogenous pathway of K. pneumoniae.Key points• 1,2-Propanediol was synthesis from glycerol by a tpiA knocked out K. pneumoniae• Overexpression of mgsA, yqhD, or fucO promote 1,2-propanediol production• 9.3 g/L of 1,2-propanediol was produced in fed-batch fermentation.
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Affiliation(s)
- Shaoqi Sun
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Lin Shu
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xiyang Lu
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Qinghui Wang
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Marina Tišma
- Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, HR 31000, Osijek, Croatia
| | - Chenguang Zhu
- School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Jiping Shi
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, People's Republic of China
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK
| | - Gary J Lye
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK
| | - Jian Hao
- Laboratory of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China. .,Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK. .,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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Sun S, Wang Y, Shu L, Lu X, Wang Q, Zhu C, Shi J, Lye GJ, Baganz F, Hao J. Redirection of the central metabolism of Klebsiella pneumoniae towards dihydroxyacetone production. Microb Cell Fact 2021; 20:123. [PMID: 34187467 PMCID: PMC8243499 DOI: 10.1186/s12934-021-01608-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 06/08/2021] [Indexed: 11/28/2022] Open
Abstract
Background Klebsiella pneumoniae is a bacterium that can be used as producer for numerous chemicals. Glycerol can be catabolised by K. pneumoniae and dihydroxyacetone is an intermediate of this catabolism pathway. Here dihydroxyacetone and glycerol were produced from glucose by this bacterium based a redirected glycerol catabolism pathway. Results tpiA, encoding triosephosphate isomerase, was knocked out to block the further catabolism of dihydroxyacetone phosphate in the glycolysis. After overexpression of a Corynebacterium glutamicum dihydroxyacetone phosphate dephosphorylase (hdpA), the engineered strain produced remarkable levels of dihydroxyacetone (7.0 g/L) and glycerol (2.5 g/L) from glucose. Further increase in product formation were obtained by knocking out gapA encoding an iosenzyme of glyceraldehyde 3-phosphate dehydrogenase. There are two dihydroxyacetone kinases in K. pneumoniae. They were both disrupted to prevent an inefficient reaction cycle between dihydroxyacetone phosphate and dihydroxyacetone, and the resulting strains had a distinct improvement in dihydroxyacetone and glycerol production. pH 6.0 and low air supplement were identified as the optimal conditions for dihydroxyacetone and glycerol production by K, pneumoniae ΔtpiA-ΔDHAK-hdpA. In fed batch fermentation 23.9 g/L of dihydroxyacetone and 10.8 g/L of glycerol were produced after 91 h of cultivation, with the total conversion ratio of 0.97 mol/mol glucose. Conclusions This study provides a novel and highly efficient way of dihydroxyacetone and glycerol production from glucose. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01608-0.
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Affiliation(s)
- Shaoqi Sun
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Yike Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Lin Shu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xiyang Lu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Qinghui Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China
| | - Chenguang Zhu
- School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Jiping Shi
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Gary J Lye
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK.
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, People's Republic of China. .,Department of Biochemical Engineering, University College London, Gordon Street, London, WC1H 0AH, UK. .,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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Yang Y, Zhang Z, Lu X, Gu J, Wang Y, Yao Y, Liao X, Shi J, Lye G, Baganz F, Hao J. Production of 2,3-dihydroxyisovalerate by Enterobacter cloacae. Enzyme Microb Technol 2020; 140:109650. [PMID: 32912674 DOI: 10.1016/j.enzmictec.2020.109650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 01/09/2023]
Abstract
2,3-Dihydroxyisovalerate is an intermediate of the valine synthesis pathway. However, neither natural microorganisms nor valine producing engineered strains have been reported yet to produce this chemical. Based on the 2,3-butanediol synthesis pathway, a biological route of 2,3-dihydroxyisovalerate production was developed using a budA and ilvD disrupted Klebsiella pneumoniae strain in our previous research. We hypothesised, that other 2,3-butanediol producing bacteria could be used for 2,3-dihydroxyisovalerate production. Here a budA disrupted Enterobacter cloacae was constructed, and this strain exhibited a high 2,3-dihydroxyisovalerate producing ability. Disruption of ilvD in E. cloacae ΔbudA further increased 2,3-dihydroxyisovalerate level. The disruption of budA, encoding an acetolactate decarboxylase, resulted in the acetolactate synthesized in the 2,3-butanediol synthesis pathway to flow into the valine synthesis pathway. The additional disruption of ilvD, encoding a dihydroxy acid dehydratase, prevented the 2,3-dihydroxyisovalerate to be further metabolized in the valine synthesis pathway. Thus, the disruption of both budA and ilvD in 2,3-butanediol producing strains might be an universal strategy for 2,3-dihydroxyisovalerate accumulation. After optimization of the medium components and culture parameters 31.2 g/L of 2,3-dihydroxyisovalerate was obtained with a productivity of 0.41 g/L h and a substrate conversion ratio of 0.56 mol/mol glucose in a fed-batch fermentation. This approach provides an economic way for 2,3-dihydroxyisovalerate production.
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Affiliation(s)
- Yang Yang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; School of Life Science, Shanghai University, Shanghai 200444, PR China
| | - Zhongxi Zhang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; School of Life Science, Shanghai University, Shanghai 200444, PR China
| | - Xiyang Lu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China
| | - Jinjie Gu
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Yike Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; School of Life Science, Shanghai University, Shanghai 200444, PR China
| | - Yao Yao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Xianyan Liao
- School of Life Science, Shanghai University, Shanghai 200444, PR China
| | - Jiping Shi
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; School of Life Science and Technology, ShanghaiTech University, PR China
| | - Gary Lye
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK.
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai, 201210, PR China; Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK.
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