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Sarma S, Ortega D, Minton NP, Dubey VK, Moholkar VS. Homologous overexpression of hydrogenase and glycerol dehydrogenase in Clostridium pasteurianum to enhance hydrogen production from crude glycerol. BIORESOURCE TECHNOLOGY 2019; 284:168-177. [PMID: 30933825 DOI: 10.1016/j.biortech.2019.03.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
This study reports engineering of a hypertransformable variant of C. pasteurianum for bioconversion of glycerol into hydrogen (H2). A functional glycerol-triggered hydrogen pathway was engineered based on two approaches: (1) increasing product yield by overexpression of immediate enzyme catalyzing H2 production, (2) increasing substrate uptake by overexpression of enzymes involved in glycerol utilization. The first strategy aimed at overexpression of hydA gene encoding hydrogenase, and the second one, through combination of overexpression of dhaD1 and dhaK genes encoding glycerol dehydrogenase and dihydroxyacetone kinase. These genetic manipulations resulted in two recombinant strains (hydA++/dhaD1K++) capable of producing 97% H2 (v/v), with yields of 1.1 mol H2/mol glycerol in hydA overexpressed strain, and 0.93 mol H2/mol glycerol in dhaD1K overexpressed strain, which was 1.5 fold higher than wild type. Among two strains, dhaD1K++ consumed more glycerol than hydA++ which proves that overexpression of glycerol enzymes has enhanced glycerol intake rate.
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Affiliation(s)
- Shyamali Sarma
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - David Ortega
- Clostridia Research Group, BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), University of Nottingham, Nottingham NG72RD, United Kingdom
| | - Nigel P Minton
- Clostridia Research Group, BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), University of Nottingham, Nottingham NG72RD, United Kingdom
| | - Vikash Kumar Dubey
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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2
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Westbrook AW, Miscevic D, Kilpatrick S, Bruder MR, Moo-Young M, Chou CP. Strain engineering for microbial production of value-added chemicals and fuels from glycerol. Biotechnol Adv 2019; 37:538-568. [DOI: 10.1016/j.biotechadv.2018.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 10/03/2018] [Accepted: 10/10/2018] [Indexed: 12/22/2022]
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3
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Recent Advances in the Metabolic Engineering of Klebsiella pneumoniae: A Potential Platform Microorganism for Biorefineries. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-018-0346-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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4
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David Y, Oh YH, Baylon MG, Baritugo KA, Joo JC, Chae CG, Kim YJ, Park SJ. Microbial Production of 3-Hydroxypropionic Acid. Ind Biotechnol (New Rochelle N Y) 2016. [DOI: 10.1002/9783527807833.ch14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Yokimiko David
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
| | - Young Hoon Oh
- Industrial Biochemicals Research Group, Research Center for Biobased Chemistry; Division of Convergence Chemistry, Korea Research Institute of Chemical Technology; P.O. Box 107, 141 Gajeong-ro Yuseong-gu Daejeon 305-600 Republic of Korea
| | - Mary Grace Baylon
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
| | - Kei-Anne Baritugo
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
| | - Jeong Chan Joo
- Industrial Biochemicals Research Group, Research Center for Biobased Chemistry; Division of Convergence Chemistry, Korea Research Institute of Chemical Technology; P.O. Box 107, 141 Gajeong-ro Yuseong-gu Daejeon 305-600 Republic of Korea
| | - Cheol Gi Chae
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
| | - You Jin Kim
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
| | - Si Jae Park
- Myongji University; Department of Environmental Engineering and Energy; 116 Myongji-ro, Cheoin-gu Yongin Gyeonggido 449-728 Republic of Korea
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Li J, Zong H, Zhuge B, Lu X, Fang H, Sun J. Immobilization of Acetobacter sp. CGMCC 8142 for efficient biocatalysis of 1, 3-propanediol to 3-hydroxypropionic acid. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-016-0022-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li Y, Wang X, Ge X, Tian P. High Production of 3-Hydroxypropionic Acid in Klebsiella pneumoniae by Systematic Optimization of Glycerol Metabolism. Sci Rep 2016; 6:26932. [PMID: 27230116 PMCID: PMC4882505 DOI: 10.1038/srep26932] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/09/2016] [Indexed: 02/02/2023] Open
Abstract
3-Hydroxypropionic acid (3-HP) is an important platform chemical proposed by the United States Department of Energy. 3-HP can be converted to a series of bulk chemicals. Biological production of 3-HP has made great progress in recent years. However, low yield of 3-HP restricts its commercialization. In this study, systematic optimization was conducted towards high-yield production of 3-HP in Klebsiella pneumoniae. We first investigated appropriate promoters for the key enzyme (aldehyde dehydrogenase, ALDH) in 3-HP biosynthesis, and found that IPTG-inducible tac promoter enabled overexpression of an endogenous ALDH (PuuC) in K. pneumoniae. We optimized the metabolic flux and found that blocking the synthesis of lactic acid and acetic acid significantly increased the production of 3-HP. Additionally, fermentation conditions were optimized and scaled-up cultivation were investigated. The highest 3-HP titer was observed at 83.8 g/L with a high conversion ratio of 54% on substrate glycerol. Furthermore, a flux distribution model of glycerol metabolism in K. pneumoniae was proposed based on in silico analysis. To our knowledge, this is the highest 3-HP production in K. pneumoniae. This work has significantly advanced biological production of 3-HP from renewable carbon sources.
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Affiliation(s)
- Ying Li
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.,College of Biochemical Engineering, Beijing Union University, Beijing 100023, People's Republic of China
| | - Xi Wang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Xizhen Ge
- College of Biochemical Engineering, Beijing Union University, Beijing 100023, People's Republic of China
| | - Pingfang Tian
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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Maervoet VET, De Maeseneire SL, Avci FG, Beauprez J, Soetaert WK, De Mey M. High yield 1,3-propanediol production by rational engineering of the 3-hydroxypropionaldehyde bottleneck in Citrobacter werkmanii. Microb Cell Fact 2016; 15:23. [PMID: 26822953 PMCID: PMC4731958 DOI: 10.1186/s12934-016-0421-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 01/13/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Imbalance in cofactors causing the accumulation of intermediates in biosynthesis pathways is a frequently occurring problem in metabolic engineering when optimizing a production pathway in a microorganism. In our previous study, a single knock-out Citrobacter werkmanii ∆dhaD was constructed for improved 1,3-propanediol (PDO) production. Instead of an enhanced PDO concentration on this strain, the gene knock-out led to the accumulation of the toxic intermediate 3-hydroxypropionaldehyde (3-HPA). The hypothesis was emerged that the accumulation of this toxic intermediate, 3-HPA, is due to a cofactor imbalance, i.e. to the limited supply of reducing equivalents (NADH). Here, this bottleneck is alleviated by rationally engineering cell metabolism to balance the cofactor supply. RESULTS By eliminating non-essential NADH consuming enzymes (such as lactate dehydrogenase coded by ldhA, and ethanol dehydrogenase coded by adhE) or by increasing NADH producing enzymes, the accumulation of 3-HPA is minimized. Combining the above modifications in C. werkmanii ∆dhaD resulted in the strain C. werkmanii ∆dhaD∆ldhA∆adhE::ChlFRT which provided the maximum theoretical yield of 1.00 ± 0.03 mol PDO/mol glycerol when grown on glucose/glycerol (0.33 molar ratio) on flask scale under anaerobic conditions. On bioreactor scale, the yield decreased to 0.73 ± 0.01 mol PDO/mol glycerol although no 3-HPA could be measured, which indicates the existence of a sink of glycerol by a putative glycerol dehydrogenase, channeling glycerol to the central metabolism. CONCLUSIONS In this study, a multiple knock-out was created in Citrobacter species for the first time. As a result, the concentration of the toxic intermediate 3-HPA was reduced to below the detection limit and the maximal theoretical PDO yield on glycerol was reached.
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Affiliation(s)
- Veerle E T Maervoet
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium. .,Department of Applied Bioscience Engineering, Laboratory of Applied Biotechnology, Ghent University, Valentin Vaerwyckweg 1, 9000, Ghent, Belgium.
| | - Sofie L De Maeseneire
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium.
| | - Fatma G Avci
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium. .,Bioengineering Department, Faculty of Engineering, Ege University, 35100, Bornova-Izmir, Turkey.
| | - Joeri Beauprez
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium.
| | - Wim K Soetaert
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium.
| | - Marjan De Mey
- Department of Biochemical and Microbial Technology, Centre of Expertise-Industrial Biotechnology and Biocatalysis, Ghent University, Coupure links 653, 9000, Ghent, Belgium.
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8
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Development of a two-step process for production of 3-hydroxypropionic acid from glycerol using Klebsiella pneumoniae and Gluconobacter oxydans. Bioprocess Biosyst Eng 2015; 38:2487-95. [DOI: 10.1007/s00449-015-1486-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 10/08/2015] [Indexed: 11/26/2022]
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9
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Metabolic engineering of cyanobacteria for photosynthetic 3-hydroxypropionic acid production from CO2 using Synechococcus elongatus PCC 7942. Metab Eng 2015; 31:163-70. [DOI: 10.1016/j.ymben.2015.08.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 04/16/2015] [Accepted: 08/05/2015] [Indexed: 02/04/2023]
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10
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Borodina I, Kildegaard KR, Jensen NB, Blicher TH, Maury J, Sherstyk S, Schneider K, Lamosa P, Herrgård MJ, Rosenstand I, Öberg F, Forster J, Nielsen J. Establishing a synthetic pathway for high-level production of 3-hydroxypropionic acid in Saccharomyces cerevisiae via β-alanine. Metab Eng 2015; 27:57-64. [DOI: 10.1016/j.ymben.2014.10.003] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/24/2014] [Accepted: 10/14/2014] [Indexed: 11/24/2022]
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11
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Liang Q, Qi Q. From a co-production design to an integrated single-cell biorefinery. Biotechnol Adv 2014; 32:1328-1335. [DOI: 10.1016/j.biotechadv.2014.08.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 07/23/2014] [Accepted: 08/17/2014] [Indexed: 10/24/2022]
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12
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Chu HS, Kim YS, Lee CM, Lee JH, Jung WS, Ahn JH, Song SH, Choi IS, Cho KM. Metabolic engineering of 3-hydroxypropionic acid biosynthesis in Escherichia coli. Biotechnol Bioeng 2014; 112:356-64. [PMID: 25163985 DOI: 10.1002/bit.25444] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 08/03/2014] [Accepted: 08/18/2014] [Indexed: 01/03/2023]
Abstract
3-Hydroxypropionic acid (3-HP) can be produced in microorganisms as a versatile platform chemical. However, owing to the toxicity of the intermediate product 3-hydroxypropionaldehyde (3-HPA), the minimization of 3-HPA accumulation is critical for enhancing the productivity of 3-HP. In this study, we identified a novel aldehyde dehydrogenase, GabD4 from Cupriavidus necator, and found that it possessed the highest enzyme activity toward 3-HPA reported to date. To augment the activity of GabD4, several variants were obtained by site-directed and saturation mutagenesis based on homology modeling. Escherichia coli transformed with the mutant GabD4_E209Q/E269Q showed the highest enzyme activity, which was 1.4-fold higher than that of wild type GabD4, and produced up to 71.9 g L(-1) of 3-HP with a productivity of 1.8 g L(-1) h(-1) . To the best of our knowledge, these are the highest 3-HP titer and productivity values among those reported in the literature. Additionally, our study demonstrates that GabD4 can be a key enzyme for the development of industrial 3-HP-producing microbial strains, and provides further insight into the mechanism of aldehyde dehydrogenase activity.
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Affiliation(s)
- Hun Su Chu
- Biomaterials Lab, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, Korea
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13
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Li Y, Liu L, Tian P. NAD(+)-independent aldehyde oxidase catalyzes cofactor balanced 3-hydroxypropionic acid production in Klebsiella pneumoniae. Biotechnol Lett 2014; 36:2215-21. [PMID: 24980850 DOI: 10.1007/s10529-014-1590-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 06/12/2014] [Indexed: 11/24/2022]
Abstract
The limiting step for biosynthesis of 3-hydroxypropionic acid (3-HP) in Klebsiella pneumoniae is the conversion of 3-hydroxypropionaldehyde (3-HPA) to 3-HP. This reaction is catalyzed by aldehyde dehydrogenase (ALDH) with NAD(+) as a cofactor. Although NAD(+)-dependent ALDH overexpression facilitates 3-HP biosynthesis, ALDH activity decreases and 3-HP stops accumulation when NAD(+) is exhausted. Here, we show that an NAD(+)-independent aldehyde oxidase (AOX) from Pseudomonas sp. AIU 362 holds promise for cofactor-balanced 3-HP production in K. pneumoniae. The AOX coding gene, alod, was heterologously expressed in E. coli and K. pneumoniae, and their respective crude cell extracts showed 38.1 U/mg and 16.6 U/mg activities toward propionaldehyde. The recombinant K. pneumoniae expressing alod showed 13.7 U/mg activity toward 3-HPA; K m and V max were 6.7 mM and 42 μM/min/mg, respectively. In shake-flask cultures, the recombinant K. pneumoniae strain produced 0.89 g 3-HP/l, twice that of the control. Moreover, it produced 3 g 3-HP/l during 24 h fed-batch cultivation in a 5 l bioreactor. The results indicate that AOX can efficiently convert 3-HPA into 3-HP.
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Affiliation(s)
- Ying Li
- Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
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14
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Wei D, Wang M, Jiang B, Shi J, Hao J. Role of dihydroxyacetone kinases I and II in the dha regulon of Klebsiella pneumoniae. J Biotechnol 2014; 177:13-9. [DOI: 10.1016/j.jbiotec.2014.02.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 02/11/2014] [Accepted: 02/14/2014] [Indexed: 10/25/2022]
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15
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Kumar V, Ashok S, Park S. Recent advances in biological production of 3-hydroxypropionic acid. Biotechnol Adv 2013; 31:945-61. [DOI: 10.1016/j.biotechadv.2013.02.008] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 02/13/2013] [Accepted: 02/24/2013] [Indexed: 11/16/2022]
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16
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Li Y, Su M, Ge X, Tian P. Enhanced aldehyde dehydrogenase activity by regenerating NAD+ in Klebsiella pneumoniae and implications for the glycerol dissimilation pathways. Biotechnol Lett 2013; 35:1609-15. [PMID: 23794046 DOI: 10.1007/s10529-013-1243-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 05/10/2013] [Indexed: 11/29/2022]
Abstract
In Klebsiella pneumoniae, 3-hydroxypropaldehyde is converted to 3-hydroxypropionic acid (3-HP) by aldehyde dehydrogenase (ALDH) with NAD(+) as a cofactor. Although ALDH overexpression stimulates the formation of 3-HP, it ceases to accumulate when NAD(+) is exhausted. Here we show that NAD(+) regeneration, together with ALDH overexpression, facilitates 3-HP production and benefits cell growth. Three distinct NAD(+)-regenerating enzymes: NADH oxidase and NADH dehydrogenase from K. pneumoniae, and glycerol-3-phosphate dehydrogenase (GPD1) from Saccharomyces cerevisiae, were individually expressed in K. pneumoniae. In vitro assay showed their higher activities than that of the control, indicating their capacities to regenerate NAD(+). When they were respectively co-expressed with ALD4, an ALDH from S. cerevisiae, the activities of ALD4 were significantly elevated compared with that expressing ALD4 alone, suggesting that the regenerated NAD(+) enhanced the activity of ALD4. More interestingly, the growth rates of all NAD(+)-regenerating strains were prolonged in comparison with the control, indicating that NAD(+) regeneration stimulated cell proliferation. This study not only reveals the reliance of ALD4 activity on NAD(+) availability but also provides a method for regulating the dha regulon.
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Affiliation(s)
- Ying Li
- College of Life Science and Technology, Beijing University of Chemical Technology, 100029, Beijing, People's Republic of China
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Valdehuesa KNG, Liu H, Nisola GM, Chung WJ, Lee SH, Park SJ. Recent advances in the metabolic engineering of microorganisms for the production of 3-hydroxypropionic acid as C3 platform chemical. Appl Microbiol Biotechnol 2013; 97:3309-21. [DOI: 10.1007/s00253-013-4802-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 02/19/2013] [Accepted: 02/20/2013] [Indexed: 01/28/2023]
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18
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Luo LH, Seo JW, Heo SY, Oh BR, Kim DH, Kim CH. Identification and characterization of Klebsiella pneumoniae aldehyde dehydrogenases increasing production of 3-hydroxypropionic acid from glycerol. Bioprocess Biosyst Eng 2013; 36:1319-26. [PMID: 23297067 DOI: 10.1007/s00449-012-0880-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Accepted: 12/20/2012] [Indexed: 11/30/2022]
Abstract
Klebsiella pneumoniae produces 3-hydroxypropionic acid (3-HP) from glycerol with oxidation of 3-hydroxypropionaldehyde (3-HPA) to 3-HP in a reaction catalyzed by aldehyde dehydrogenase (ALDH). In the present study, two putative ALDHs of K. pneumoniae, YneI and YdcW were identified and characterized. Recombinant YneI was specifically active on 3-HPA and preferred NAD(+) as a cofactor, whereas YdcW exhibited broad substrate specificity and preferred NADP(+) as a cofactor. Overexpression of ALDHs in the glycerol oxidative pathway-deficient mutant K. pneumoniae AK resulted in a significant increase in 3-HP production upon shake-flask culture. The final titers of 3-HP were 2.4 and 1.8 g L(-1) by recombinants overexpressing YneI and YdcW, respectively. Deletion of the ALDH gene from K. pneumoniae did not affect the extent of 3-HP synthesis, implying non-specific activity of ALDHs on 3-HPA. The ALDHs might play major roles in detoxifying the aldehyde generated in glycerol metabolism.
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Affiliation(s)
- Lian Hua Luo
- Applied Microbiology Research Center, Bio-Materials Research Institute, Korea Research Institute of Bioscience and Biotechnology KRIBB, Jeongeup-si 580-185, South Korea
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Huang Y, Li Z, Shimizu K, Ye Q. Co-production of 3-hydroxypropionic acid and 1,3-propanediol by Klebseilla pneumoniae expressing aldH under microaerobic conditions. BIORESOURCE TECHNOLOGY 2013. [PMID: 23201906 DOI: 10.1016/j.biortech.2012.10.143] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Fed-batch cultures of Klebsiella pneumoniae expressing Escherichia coli aldH were performed under microaerobic conditions to investigate the effects on metabolites production. Increasing the aeration rate enhanced cell growth and 3-hydroxypropionic acid (3-HP) production, but reduced 1,3-propanediol (1,3-PDO) formation. The recombinant strain K. pneumoniae/pUC18kan-aldHec produced 48.9 g/L of 3-HP and 25.3g/L of 1,3-PDO with an overall yield of 0.66 mol/mol in 28 h at an aeration rate of 1.5 vvm; however, under fully aerobic condition, no 3-HP and 1,3-PDO were produced due to the repression of dha operon. The flux through the reaction catalyzed by glycerol dehydratase and the split ratio of 1,3-PDO were negatively correlated with the aeration rate, even though the 3-HP level showed a positive trend. This study demonstrated that the relative amounts of 3-HP and 1,3-PDO can be controlled by the aeration rate.
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Affiliation(s)
- Yanna Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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20
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Luo LH, Kim CH, Heo SY, Oh BR, Hong WK, Kim S, Kim DH, Seo JW. Production of 3-hydroxypropionic acid through propionaldehyde dehydrogenase PduP mediated biosynthetic pathway in Klebsiella pneumoniae. BIORESOURCE TECHNOLOGY 2012; 103:1-6. [PMID: 22018749 DOI: 10.1016/j.biortech.2011.09.099] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 09/20/2011] [Accepted: 09/23/2011] [Indexed: 05/31/2023]
Abstract
The pduP gene encodes a propionaldehyde dehydrogenase (PduP) was investigated for the role in 3-hydroxypropionic acid (3-HP) glycerol metabolism in Klebsiella pneumoniae. The enzyme assay showed that cell extracts from a pduP mutant strain lacked measurable dehydrogenase activity. Additionally, the mutant strain accumulated the cytotoxic intermediate metabolite 3-hydroxypropionaldehyde (3-HPA), causing both cell death and a lower final 3-HP titer. Ectopic expression of pduP restored normal cell growth to mutant. The enzymatic property of recombinant protein from Escherichia coli was examined, exhibiting a broad substrate specificity, being active on 3-HPA. The present work is thus the first to demonstrate the role of PduP in glycerol metabolism and biosynthesis of 3-HP.
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Affiliation(s)
- Lian Hua Luo
- Microbe-based Fusion Technology Research Center, Jeonbuk Branch Institute, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeonbuk 580-185, South Korea
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Huang Y, Li Z, Shimizu K, Ye Q. Simultaneous production of 3-hydroxypropionic acid and 1,3-propanediol from glycerol by a recombinant strain of Klebsiella pneumoniae. BIORESOURCE TECHNOLOGY 2012; 103:351-9. [PMID: 22055092 DOI: 10.1016/j.biortech.2011.10.022] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 10/04/2011] [Accepted: 10/06/2011] [Indexed: 05/18/2023]
Abstract
In this study, an aldehyde dehydrogenase (ALDH) was over-expressed in Klebsiella pneumoniae for simultaneous production of 3-hydroxypropionic acid (3-HP) and 1,3-propanediol (1,3-PDO). Various genes encoding ALDH were cloned and expressed in K. pneumoniae, and expression of Escherichia colialdH resulted in the highest 3-HP titer in anaerobic cultures in shake flasks. Anaerobic fed-batch culture of this recombinant strain was further performed in a 5-L reactor. The 3-HP concentration and yield reached 24.4 g/L and 0.18 mol/mol glycerol, respectively, and at the same time 1,3-PDO achieved 49.3 g/L with a yield of 0.43 mol/mol in 24 h. The overall yield of 3-HP plus 1,3-PDO was 0.61 mol/mol. Over-expression of the E. coli AldH also reduced the yields of by-products except for lactate. This study demonstrated the possibility of simultaneous production of 3-HP and 1,3-PDO by K. pneumoniae under anaerobic conditions without supply of vitamin B12.
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Affiliation(s)
- Yanna Huang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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