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Son J, Sohn YJ, Baritugo KA, Jo SY, Song HM, Park SJ. Recent advances in microbial production of diamines, aminocarboxylic acids, and diacids as potential platform chemicals and bio-based polyamides monomers. Biotechnol Adv 2023; 62:108070. [PMID: 36462631 DOI: 10.1016/j.biotechadv.2022.108070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/16/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022]
Abstract
Recently, bio-based manufacturing processes of value-added platform chemicals and polymers in biorefineries using renewable resources have extensively been developed for sustainable and carbon dioxide (CO2) neutral-based industry. Among them, bio-based diamines, aminocarboxylic acids, and diacids have been used as monomers for the synthesis of polyamides having different carbon numbers and ubiquitous and versatile industrial polymers and also as precursors for further chemical and biological processes to afford valuable chemicals. Until now, these platform bio-chemicals have successfully been produced by biorefinery processes employing enzymes and/or microbial host strains as main catalysts. In this review, we discuss recent advances in bio-based production of diamines, aminocarboxylic acids, and diacids, which has been developed and improved by systems metabolic engineering strategies of microbial consortia and optimization of microbial conversion processes including whole cell bioconversion and direct fermentative production.
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Affiliation(s)
- Jina Son
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Yu Jung Sohn
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Kei-Anne Baritugo
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Seo Young Jo
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Hye Min Song
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Si Jae Park
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea.
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Narisetty V, Okibe MC, Amulya K, Jokodola EO, Coulon F, Tyagi VK, Lens PNL, Parameswaran B, Kumar V. Technological advancements in valorization of second generation (2G) feedstocks for bio-based succinic acid production. BIORESOURCE TECHNOLOGY 2022; 360:127513. [PMID: 35772717 DOI: 10.1016/j.biortech.2022.127513] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
Succinic acid (SA) is used as a commodity chemical and as a precursor in chemical industry to produce other derivatives such as 1,4-butaneidol, tetrahydrofuran, fumaric acid, and bio-polyesters. The production of bio-based SA from renewable feedstocks has always been in the limelight owing to the advantages of renewability, abundance and reducing climate change by CO2 capture. Considering this, the current review focuses on various 2G feedstocks such as lignocellulosic biomass, crude glycerol, and food waste for cost-effective SA production. It also highlights the importance of producing SA via separate enzymatic hydrolysis and fermentation, simultaneous saccharification and fermentation, and consolidated bioprocessing. Furthermore, recent advances in genetic engineering, and downstream SA processing are thoroughly discussed. It also elaborates on the techno-economic analysis and life cycle assessment (LCA) studies carried out to understand the economics and environmental effects of bio-based SA synthesis.
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Affiliation(s)
- Vivek Narisetty
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK
| | | | - K Amulya
- National University of Ireland Galway, University Road, H91TK33 Galway, Ireland
| | | | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK
| | - Vinay Kumar Tyagi
- Environmental Hydrology Division, National Institute of Hydrology (NIH), Roorkee 247667, Uttarakhand, India
| | - Piet N L Lens
- National University of Ireland Galway, University Road, H91TK33 Galway, Ireland
| | - Binod Parameswaran
- Microbial Processes and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Trivandrum, Kerala 695019, India
| | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK.
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Narisetty V, Cox R, Bommareddy R, Agrawal D, Ahmad E, Pant KK, Chandel AK, Bhatia SK, Kumar D, Binod P, Gupta VK, Kumar V. Valorisation of xylose to renewable fuels and chemicals, an essential step in augmenting the commercial viability of lignocellulosic biorefineries. SUSTAINABLE ENERGY & FUELS 2021; 6:29-65. [PMID: 35028420 PMCID: PMC8691124 DOI: 10.1039/d1se00927c] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 10/25/2021] [Indexed: 05/30/2023]
Abstract
Biologists and engineers are making tremendous efforts in contributing to a sustainable and green society. To that end, there is growing interest in waste management and valorisation. Lignocellulosic biomass (LCB) is the most abundant material on the earth and an inevitable waste predominantly originating from agricultural residues, forest biomass and municipal solid waste streams. LCB serves as the renewable feedstock for clean and sustainable processes and products with low carbon emission. Cellulose and hemicellulose constitute the polymeric structure of LCB, which on depolymerisation liberates oligomeric or monomeric glucose and xylose, respectively. The preferential utilization of glucose and/or absence of the xylose metabolic pathway in microbial systems cause xylose valorization to be alienated and abandoned, a major bottleneck in the commercial viability of LCB-based biorefineries. Xylose is the second most abundant sugar in LCB, but a non-conventional industrial substrate unlike glucose. The current review seeks to summarize the recent developments in the biological conversion of xylose into a myriad of sustainable products and associated challenges. The review discusses the microbiology, genetics, and biochemistry of xylose metabolism with hurdles requiring debottlenecking for efficient xylose assimilation. It further describes the product formation by microbial cell factories which can assimilate xylose naturally and rewiring of metabolic networks to ameliorate xylose-based bioproduction in native as well as non-native strains. The review also includes a case study that provides an argument on a suitable pathway for optimal cell growth and succinic acid (SA) production from xylose through elementary flux mode analysis. Finally, a product portfolio from xylose bioconversion has been evaluated along with significant developments made through enzyme, metabolic and process engineering approaches, to maximize the product titers and yield, eventually empowering LCB-based biorefineries. Towards the end, the review is wrapped up with current challenges, concluding remarks, and prospects with an argument for intense future research into xylose-based biorefineries.
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Affiliation(s)
- Vivek Narisetty
- School of Water, Energy and Environment, Cranfield University Cranfield MK43 0AL UK +44 (0)1234754786
| | - Rylan Cox
- School of Water, Energy and Environment, Cranfield University Cranfield MK43 0AL UK +44 (0)1234754786
- School of Aerospace, Transport and Manufacturing, Cranfield University Cranfield MK43 0AL UK
| | - Rajesh Bommareddy
- Department of Applied Sciences, Northumbria University Newcastle upon Tyne NE1 8ST UK
| | - Deepti Agrawal
- Biochemistry and Biotechnology Area, Material Resource Efficiency Division, CSIR- Indian Institute of Petroleum Mohkampur Dehradun 248005 India
| | - Ejaz Ahmad
- Department of Chemical Engineering, Indian Institute of Technology (ISM) Dhanbad 826004 India
| | - Kamal Kumar Pant
- Department of Chemical Engineering, Indian Institute of Technology Delhi New Delhi 110016 India
| | - Anuj Kumar Chandel
- Department of Biotechnology, Engineering School of Lorena (EEL), University of São Paulo Lorena 12.602.810 Brazil
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University Seoul 05029 Republic of Korea
| | - Dinesh Kumar
- School of Bioengineering & Food Technology, Shoolini University of Biotechnology and Management Sciences Solan 173229 Himachal Pradesh India
| | - Parmeswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) Thiruvananthapuram 695 019 Kerala India
| | | | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University Cranfield MK43 0AL UK +44 (0)1234754786
- Department of Chemical Engineering, Indian Institute of Technology Delhi New Delhi 110016 India
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4
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Becker J, Wittmann C. Metabolic Engineering of
Corynebacterium glutamicum. Metab Eng 2021. [DOI: 10.1002/9783527823468.ch12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Recent progress in metabolic engineering of Corynebacterium glutamicum for the production of C4, C5, and C6 chemicals. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0788-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Jin C, Bao J. Lysine Production by Dry Biorefining of Wheat Straw and Cofermentation of Corynebacterium glutamicum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:1900-1906. [PMID: 33539090 DOI: 10.1021/acs.jafc.0c07902] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A preliminary study shows that lysine production from lignocellulose feedstock is feasible, but the conversion of xylose in lignocellulose to lysine remains unsolved. Two technical barriers are responsible for the remaining xylose conversion: one is the xylose loss into the wastewater stream of the biorefinery processing chain, and the other is the lack of efficient lysine-producing strain with xylose utilization. Here, we conducted a new biorefinery approach of consequent dry acid pretreatment and biodetoxification, resulting in zero wastewater generation and then well-preserved xylose. To provide the lysine-producing strain with xylose utilization, we modified the Corynebacterium glutamicum by establishing the xylose assimilation pathway and improving the NADPH cofactor regeneration. The combinational modification of biorefinery processing and strain development led to 31.3 g/L of lysine production with a yield of 0.23 g lysine per gram of wheat straw derived sugars. This study provides a practical method for upgraded lysine production from lignocellulose for future industrial applications.
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Affiliation(s)
- Ci Jin
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jie Bao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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Pretreatment and Detoxification of Acid-Treated Wood Hydrolysates for Pyruvate Production by an Engineered Consortium of Escherichia coli. Appl Biochem Biotechnol 2020; 192:243-256. [PMID: 32372381 DOI: 10.1007/s12010-020-03320-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/23/2020] [Indexed: 10/24/2022]
Abstract
The biorefinery concept makes use of renewable lignocellulosic biomass to produce commodities sustainably. A synthetic microbial consortium can enable the simultaneous utilization of sugars such as glucose and xylose to produce biochemicals, where each consortium member converts one sugar into the target product. In this study, woody biomass was used to generate glucose and xylose after pretreatment with 20% (w/v) sulfuric acid and 60-min reaction time. We compared several strategies for detoxification with charcoal and sodium borohydride treatments to improve the fermentability of this hydrolysate in a defined medium for the production of the growth-associated product pyruvate. In shake flask culture, the highest pyruvate yield on xylose of 0.8 g/g was found using pH 6 charcoal-treated hydrolysate. In bioreactor studies, a consortium of two engineered E. coli strains converted the mixture of glucose and xylose in batch studies to 12.8 ± 2.7 g/L pyruvate in 13 h. These results demonstrate that lignocellulosic biomass as the sole carbon source can be used to produce growth-related products after employing suitable detoxification strategies.
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Abstract
With the transition to the bio-based economy, it is becoming increasingly important for the chemical industry to obtain basic chemicals from renewable raw materials. Succinic acid, one of the most important bio-based building block chemicals, is used in the food and pharmaceutical industries, as well as in the field of bio-based plastics. An alternative process for the bio-based production of succinic acid was the main objective of this study, focusing on the biotechnological production of succinic acid using a newly isolated organism. Pure glycerol compared to crude glycerol, at the lowest purity, directly from a biodiesel plant side stream, was successfully converted. A maximum final titer of 117 g L−1 succinic acid and a yield of 1.3 g g−1 were achieved using pure glycerol and 86.9 g L−1 succinic acid and a yield of 0.9 g g−1 using crude glycerol. Finally, the succinic acid was crystallized, achieving maximum yield of 95% and a purity of up to 99%.
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Choi JW, Jeon EJ, Jeong KJ. Recent advances in engineering Corynebacterium glutamicum for utilization of hemicellulosic biomass. Curr Opin Biotechnol 2019; 57:17-24. [DOI: 10.1016/j.copbio.2018.11.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/16/2018] [Accepted: 11/08/2018] [Indexed: 10/27/2022]
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Wang C, Su X, Sun W, Zhou S, Zheng J, Zhang M, Sun M, Xue J, Liu X, Xing J, Chen S. Efficient production of succinic acid from herbal extraction residue hydrolysate. BIORESOURCE TECHNOLOGY 2018; 265:443-449. [PMID: 29935453 DOI: 10.1016/j.biortech.2018.06.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
In this study, six different herbal-extraction residues were evaluated for succinic acid production in terms of chemical composition before and after dilute acid pretreatment (DAP) and sugar release performance. Chemical composition showed that pretreated residues of Glycyrrhiza uralensis Fisch (GUR) and Morus alba L. (MAR) had the highest cellulose content, 50% and 52%, respectively. Higher concentrations of free sugars (71.6 g/L total sugar) and higher hydrolysis yield (92%) were both obtained under 40 FPU/g DM at 10% solid loading for GUR. Using scanning electron microscopy (SEM), GUR was found to show a less compact structure due to process of extraction. Specifically, the fibers in pretreated GUR were coarse and disordered compared with that of GUR indicated by SEM. Finally, 65 g/L succinic acid was produced with a higher yield of 0.89 g/g total sugar or 0.49 g/g GUR. Our results illustrate the potential of GUR for succinic acid production.
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Affiliation(s)
- Caixia Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China
| | - Xinyao Su
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China; School of Life Science, Huai Bei Normal University, Huaibei 23500, PR China
| | - Wei Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China
| | - Sijing Zhou
- Beijing Radiation Center, Beijing 100015, PR China
| | - Junyu Zheng
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China
| | - Mengting Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, PR China
| | - Mengchu Sun
- School of Life Science, Huai Bei Normal University, Huaibei 23500, PR China
| | - Jianping Xue
- School of Life Science, Huai Bei Normal University, Huaibei 23500, PR China
| | - Xia Liu
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jianmin Xing
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Shilin Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, No. 16, Nanxiaojie, Dongzhimennei, Beijing 100700, PR China.
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Chen X, Zhou Y, Zhang D. EngineeringCorynebacterium crenatumfor enhancing succinic acid production. J Food Biochem 2018. [DOI: 10.1111/jfbc.12645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoju Chen
- College of Chemistry and Material Engineering Chaohu University Chaohu China
| | - Yaojie Zhou
- School of Food and Biological Engineering Jiangsu University Zhenjiang China
| | - Di Zhang
- School of Food and Biological Engineering Jiangsu University Zhenjiang China
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Mao Y, Li G, Chang Z, Tao R, Cui Z, Wang Z, Tang YJ, Chen T, Zhao X. Metabolic engineering of Corynebacterium glutamicum for efficient production of succinate from lignocellulosic hydrolysate. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:95. [PMID: 29636817 PMCID: PMC5883316 DOI: 10.1186/s13068-018-1094-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/24/2018] [Indexed: 05/10/2023]
Abstract
BACKGROUND Succinate has been recognized as one of the most important bio-based building block chemicals due to its numerous potential applications. However, efficient methods for the production of succinate from lignocellulosic feedstock were rarely reported. Nevertheless, Corynebacterium glutamicum was engineered to efficiently produce succinate from glucose in our previous study. RESULTS In this work, C. glutamicum was engineered for efficient succinate production from lignocellulosic hydrolysate. First, xylose utilization of C. glutamicum was optimized by heterologous expression of xylA and xylB genes from different sources. Next, xylA and xylB from Xanthomonas campestris were selected among four candidates to accelerate xylose consumption and cell growth. Subsequently, the optimal xylA and xylB were co-expressed in C. glutamicum strain SAZ3 (ΔldhAΔptaΔpqoΔcatPsod-ppcPsod-pyc) along with genes encoding pyruvate carboxylase, citrate synthase, and a succinate exporter to achieve succinate production from xylose in a two-stage fermentation process. Xylose utilization and succinate production were further improved by overexpressing the endogenous tkt and tal genes and introducing araE from Bacillus subtilis. The final strain C. glutamicum CGS5 showed an excellent ability to produce succinate in two-stage fermentations by co-utilizing a glucose-xylose mixture under anaerobic conditions. A succinate titer of 98.6 g L-1 was produced from corn stalk hydrolysate with a yield of 0.87 g/g total substrates and a productivity of 4.29 g L-1 h-1 during the anaerobic stage. CONCLUSION This work introduces an efficient process for the bioconversion of biomass into succinate using a thoroughly engineered strain of C. glutamicum. To the best of our knowledge, this is the highest titer of succinate produced from non-food lignocellulosic feedstock, which highlights that the biosafety level 1 microorganism C. glutamicum is a promising platform for the envisioned lignocellulosic biorefinery.
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Affiliation(s)
- Yufeng Mao
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Guiying Li
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Zhishuai Chang
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Ran Tao
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Zhenzhen Cui
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Zhiwen Wang
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Ya-jie Tang
- Key Laboratory of Fermentation Engineering, Ministry of Education, Hubei University of Technology, Wuhan, 430068 China
| | - Tao Chen
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
| | - Xueming Zhao
- Key Laboratory of Systems Bioengineering (Ministry of Education), SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 China
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Li C, Gao S, Li X, Yang X, Lin CSK. Efficient metabolic evolution of engineered Yarrowia lipolytica for succinic acid production using a glucose-based medium in an in situ fibrous bioreactor under low-pH condition. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:236. [PMID: 30181775 PMCID: PMC6116362 DOI: 10.1186/s13068-018-1233-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/22/2018] [Indexed: 05/02/2023]
Abstract
BACKGROUND Alkali used for pH control during fermentation and acidification for downstream recovery of succinic acid (SA) are the two largest cost contributors for bio-based SA production. To promote the commercialization process of fermentative SA, the development of industrially important microorganisms that can tolerate low pH has emerged as a crucial issue. RESULTS In this study, an in situ fibrous bed bioreactor (isFBB) was employed for the metabolic evolution for selection of Y. lipolytica strain that can produce SA at low pH using glucose-based medium. An evolved strain named Y. lipolytica PSA3.0 that could produce SA with a titer of 19.3 g/L, productivity of 0.52 g/L/h, and yield of 0.29 g/g at pH 3.0 from YPD was achieved. The enzyme activity analysis demonstrated that the pathway from pyruvate to acetate was partially blocked in Y. lipolytica PSA3.0 after the evolution, which is beneficial to cell growth and SA production at low pH. When free-cell batch fermentations were performed using the parent and evolved strains separately, the evolved strain PSA3.0 produced 18.4 g/L SA with a yield of 0.23 g/g at pH 3.0. Although these values were lower than that obtained by the parent strain PSA02004 at its optimal pH 6.0, which were 25.2 g/L and 0.31 g/g, respectively, they were 4.8 and 4.6 times higher than that achieved by PSA02004 at pH 3.0. By fed-batch fermentation, the resultant SA titer of 76.8 g/L was obtained, which is the highest value that ever achieved from glucose-based medium at low pH, to date. When using mixed food waste (MFW) hydrolysate as substrate, 18.9 g/L SA was produced with an SA yield of 0.38 g/g, which demonstrates the feasibility of using low-cost glucose-based hydrolysate for SA production by Y. lipolytica in a low-pH environment. CONCLUSIONS This study presents an effective and efficient strategy for the evolution of Y. lipolytica for SA production under low-pH condition for the first time. The isFBB was demonstrated to improve the metabolic evolution efficiency of Y. lipolytica to the acidic condition. Moreover, the acetate accumulation was found to be the major reason for the inhibition of SA production at low pH by Y. lipolytica, which suggested the direction for further metabolic modification of the strain for improved SA production. Furthermore, the evolved strain Y. lipolytica PSA3.0 was demonstrated to utilize glucose-rich hydrolysate from MFW for fermentative SA production at low pH. Similarly, Y. lipolytica PSA3.0 is expected to utilize the glucose-rich hydrolysate generated from other carbohydrate-rich waste streams for SA production. This study paves the way for the commercialization of bio-based SA and contributes to the sustainable development of a green economy.
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Affiliation(s)
- Chong Li
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
- Agricultural Genomic Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120 Guangdong People’s Republic of China
| | - Shi Gao
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Xiaotong Li
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Xiaofeng Yang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006 People’s Republic of China
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
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Wang X, Khushk I, Xiao Y, Gao Q, Bao J. Tolerance improvement of Corynebacterium glutamicum on lignocellulose derived inhibitors by adaptive evolution. Appl Microbiol Biotechnol 2017; 102:377-388. [DOI: 10.1007/s00253-017-8627-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/24/2017] [Accepted: 11/06/2017] [Indexed: 01/09/2023]
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Chen X, Wu X, Jiang S, Li X. Influence of pH and neutralizing agent on anaerobic succinic acid production by a Corynebacterium crenatum strain. J Biosci Bioeng 2017; 124:439-444. [PMID: 28583808 DOI: 10.1016/j.jbiosc.2017.04.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/05/2017] [Accepted: 04/30/2017] [Indexed: 11/17/2022]
Abstract
Environmental conditions, particularly pH, have significant effects on the efficiency and final titers of bio-based products. Therefore, these factors need to be identified to ensure the fermentation process is economically attractive. In this study, strategies for controlling pH were optimized to enhance succinic acid production by Corynebacterium crenatum J-2. The results indicate that pH 6.8 is the optimal value for anaerobic succinic acid production by C. crenatum J-2 in terms of productivity and titer. The use of Mg(OH)2 as the neutralizing agent for pH control resulted in the highest levels of succinic acid concentration, yield, and productivity; superior to the levels obtained with Ca(OH)2, KOH, and NaOH. Under conditions of pH 6.8 and Mg(OH)2 as the neutralizing agent, 45.7 g/L succinic acid was produced within 12 h during the prophase of anaerobic fermentation, resulting in a succinic acid productivity of 3.8 g/(L·h). Succinic acid concentration reached 53.8 g/L at 22 h, with a productivity of 2.45 g/(L·h). The results of this study will be useful for the development of highly efficient succinic acid production processes utilizing industrial Corynebacterium spp. strains.
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Affiliation(s)
- Xiaoju Chen
- College of Chemistry and Material Engineering, Chaohu University, Chaohu, Anhui 238000, China; School of Biotechnology and Food Engineering, The Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Xuefeng Wu
- School of Biotechnology and Food Engineering, The Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei, Anhui 230009, China.
| | - Shaotong Jiang
- School of Biotechnology and Food Engineering, The Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Xingjiang Li
- School of Biotechnology and Food Engineering, The Key Laboratory for Agricultural Products Processing of Anhui Province, Hefei University of Technology, Hefei, Anhui 230009, China
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16
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Wang C, Zhou Z, Cai H, Chen Z, Xu H. Redirecting carbon flux through pgi-deficient and heterologous transhydrogenase toward efficient succinate production in Corynebacterium glutamicum. J Ind Microbiol Biotechnol 2017; 44:1115-1126. [PMID: 28303352 DOI: 10.1007/s10295-017-1933-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/01/2017] [Indexed: 11/24/2022]
Abstract
Corynebacterium glutamicum is particularly known for its potentiality in succinate production. We engineered C. glutamicum for the production of succinate. To enhance C3-C4 carboxylation efficiency, chromosomal integration of the pyruvate carboxylase gene pyc resulted in strain NC-4. To increase intracellular NADH pools, the pntAB gene from Escherichia coli, encoding for transhydrogenase, was chromosomally integrated into NC-4, leading to strain NC-5. Furthermore, we deleted pgi gene in strain NC-5 to redirect carbon flux to the pentose phosphate pathway (PPP). To solve the drastic reduction of PTS-mediated glucose uptake, the ptsG gene from C. glutamicum, encoding for the glucose-specific transporter, was chromosomally integrated into pgi-deficient strain resulted in strain NC-6. In anaerobic batch fermentation, the production of succinate in pntAB-overexpressing strain NC-5 increased by 14% and a product yield of 1.22 mol/mol was obtained. In anaerobic fed-batch process, succinic acid concentration reached 856 mM by NC-6. The yields of succinate from glucose were 1.37 mol/mol accompanied by a very low level of by-products. Activating PPP and transhydrogenase in combination led to a succinate yield of 1.37 mol/mol, suggesting that they exhibited a synergistic effect for improving succinate yield.
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Affiliation(s)
- Chen Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Zhihui Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Heng Cai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.
| | - Zhongjun Chen
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Hongtao Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, China.,College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010018, China
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17
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Podleśny M, Jarocki P, Wyrostek J, Czernecki T, Kucharska J, Nowak A, Targoński Z. Enterobacter sp. LU1 as a novel succinic acid producer - co-utilization of glycerol and lactose. Microb Biotechnol 2017; 10:492-501. [PMID: 27910262 PMCID: PMC5328818 DOI: 10.1111/1751-7915.12458] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 10/05/2016] [Accepted: 10/22/2016] [Indexed: 11/28/2022] Open
Abstract
Succinic acid is an important C4-building chemical platform for many applications. A novel succinic acid-producing bacterial strain was isolated from goat rumen. Phylogenetic analysis based on the 16S rRNA sequence and physiological analysis indicated that the strain belongs to the genus Enterobacter. This is the first report of a wild bacterial strain from the genus Enterobacter that is capable of efficient succinic acid production. Co-fermentation of glycerol and lactose significantly improved glycerol utilization under anaerobic conditions, debottlenecking the utilization pathway of this valuable biodiesel waste product. Succinic acid production reached 35 g l-1 when Enterobacter sp. LU1 was cultured in medium containing 50 g l-1 of glycerol and 25 g l-1 of lactose as carbon sources.
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Affiliation(s)
- Marcin Podleśny
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Piotr Jarocki
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Jakub Wyrostek
- Department of Analysis and Food Quality AssessmentLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Tomasz Czernecki
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Jagoda Kucharska
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Anna Nowak
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
| | - Zdzisław Targoński
- Department of Biotechnology, Human Nutrition and Food CommoditiesLublin University of Life Sciences8 SkromnaLublin20‐704Poland
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18
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CO 2 Biofixation of Actinobacillus succinogenes Through Novel Amine-Functionalized Polystyrene Microsphere Materials. Appl Biochem Biotechnol 2016; 181:584-592. [PMID: 27623815 DOI: 10.1007/s12010-016-2233-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 08/29/2016] [Indexed: 10/21/2022]
Abstract
CO2-derived succinate production was enhanced by Actinobacillus succinogenes through polystyrene (PSt) microsphere materials for CO2 adsorption in bioreactor, and the adhesion forces between A. succinogenes bacteria and PSt materials were characterized. Synthesized uniformly sized and highly cross-linked PSt microspheres had high specific surface areas. After modification with amine functional groups, the novel amine-functionalized PSt microspheres exhibited a high adsorption capacity of 25.3 mg CO2/g materials. After addition with the functionalized microspheres into the culture broth, CO2 supply to the cells increased. Succinate production by A. succinogenes can be enhanced from 29.6 to 48.1 g L-1. Moreover, the characterization of interaction forces between A. succinogenes cells and the microspheres indicated that the maximal adhesive force was about 250 pN. The amine-functionalized PSt microspheres can adsorb a large amount of CO2 and be employed for A. succinogenes anaerobic cultivation in bioreactor for high-efficiency production of CO2-derived succinate.
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Salvachúa D, Smith H, St John PC, Mohagheghi A, Peterson DJ, Black BA, Dowe N, Beckham GT. Succinic acid production from lignocellulosic hydrolysate by Basfia succiniciproducens. BIORESOURCE TECHNOLOGY 2016; 214:558-566. [PMID: 27179951 DOI: 10.1016/j.biortech.2016.05.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/05/2016] [Accepted: 05/06/2016] [Indexed: 05/03/2023]
Abstract
The production of chemicals alongside fuels will be essential to enhance the feasibility of lignocellulosic biorefineries. Succinic acid (SA), a naturally occurring C4-diacid, is a primary intermediate of the tricarboxylic acid cycle and a promising building block chemical that has received significant industrial attention. Basfia succiniciproducens is a relatively unexplored SA-producing bacterium with advantageous features such as broad substrate utilization, genetic tractability, and facultative anaerobic metabolism. Here B. succiniciproducens is evaluated in high xylose-content hydrolysates from corn stover and different synthetic media in batch fermentation. SA titers in hydrolysate at an initial sugar concentration of 60g/L reached up to 30g/L, with metabolic yields of 0.69g/g, and an overall productivity of 0.43g/L/h. These results demonstrate that B. succiniciproducens may be an attractive platform organism for bio-SA production from biomass hydrolysates.
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Affiliation(s)
- Davinia Salvachúa
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Holly Smith
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Peter C St John
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Ali Mohagheghi
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Darren J Peterson
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Brenna A Black
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Nancy Dowe
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Gregg T Beckham
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA.
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Wang C, Cai H, Chen Z, Zhou Z. Engineering a glycerol utilization pathway in Corynebacterium glutamicum for succinate production under O2 deprivation. Biotechnol Lett 2016; 38:1791-7. [DOI: 10.1007/s10529-016-2166-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 06/26/2016] [Indexed: 01/26/2023]
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21
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Xu H, Zhou Z, Wang C, Chen Z, Cai H. Enhanced succinic acid production in Corynebacterium glutamicum with increasing the available NADH supply and glucose consumption rate by decreasing H(+)-ATPase activity. Biotechnol Lett 2016; 38:1181-6. [PMID: 27053082 DOI: 10.1007/s10529-016-2093-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 03/31/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To enhance succinic acid production in Corynebacterium glutamicum by increasing the supply of NADH and the rate of glucose consumption by decreasing H(+)-ATPase activity. RESULTS A mutant of C. glutamicum NC-3-1 with decreased H(+)-ATPase activity was constructed. This increased the rate of glycolysis and the supply of NADH. Fermentation of C. glutamicum NC-3-1 gave 39 % higher succinic acid production (113 and 81 g/l), a 29 % higher succinic acid yield (0.94 and 0.73 g succinic acid/g glucose) and decreased by-products formation compared to that of C. glutamicum NC-3 in 5 l bioreactor. CONCLUSION The point mutation in C. glutamicum NC-3-1 increased the rate of glycolysis and resulted in higher succinic acid production, higher succinic acid yield and significantly decreased formation of by-products.
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Affiliation(s)
- Hongtao Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China
| | - Zhihui Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China
| | - Chen Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China
| | - Zhongjun Chen
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Heng Cai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China.
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Improving Process Yield in Succinic Acid Production by Cell Recycling of Recombinant Corynebacterium glutamicum. FERMENTATION-BASEL 2016. [DOI: 10.3390/fermentation2010005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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23
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24
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Effects of lignocellulose-derived inhibitors on growth and succinic acid accumulation by Corynebacterium glutamicum. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-015-0201-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Directed evolution and mutagenesis of lysine decarboxylase from Hafnia alvei AS1.1009 to improve its activity toward efficient cadaverine production. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0690-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Increasing succinic acid production using the PTS-independent glucose transport system in a Corynebacterium glutamicum PTS-defective mutant. ACTA ACUST UNITED AC 2015; 42:1073-82. [DOI: 10.1007/s10295-015-1630-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 04/28/2015] [Indexed: 12/29/2022]
Abstract
Abstract
Succinic acid synthesized from glucose shows potential as a bio-based platform chemical. However, the need for a high glucose concentration, and the accompanying low yields, limit its industrial applications. Despite efficient glucose uptake by the phosphotransferase system (PTS), 1 mol of phosphoenolpyruvate is required for each mole of internalized glucose. Therefore, a PTS-defective Corynebacterium glutamicum mutant was constructed to increase phosphoenolpyruvate availability for succinic acid synthesis, resulting in a lower glucose utilization rate and slower growth. The transcriptional regulator iolR was also deleted to enable the PTS-defective mutant to utilize glucose via iolT-mediated glucose transport. Deletion of iolR and overexpression of iolT1 and ppgk (polyphosphate glucokinase) in the PTS-deficient C. glutamicum strain completely restored glucose utilization, increasing production by 11.6 % and yield by 32.4 % compared with the control. This study revealed for the first time that iolR represses the expression of the two glucokinase genes (glk and ppgk).
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27
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Fine-tuning of ecaA and pepc gene expression increases succinic acid production in Escherichia coli. Appl Microbiol Biotechnol 2015; 99:8575-86. [DOI: 10.1007/s00253-015-6734-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 05/04/2015] [Accepted: 05/27/2015] [Indexed: 12/20/2022]
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28
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Functional Characterization of Corynebacterium alkanolyticum β-Xylosidase and Xyloside ABC Transporter in Corynebacterium glutamicum. Appl Environ Microbiol 2015; 81:4173-83. [PMID: 25862223 DOI: 10.1128/aem.00792-15] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 04/06/2015] [Indexed: 11/20/2022] Open
Abstract
The Corynebacterium alkanolyticum xylEFGD gene cluster comprises the xylD gene that encodes an intracellular β-xylosidase next to the xylEFG operon encoding a substrate-binding protein and two membrane permease proteins of a xyloside ABC transporter. Cloning of the cluster revealed a recombinant β-xylosidase of moderately high activity (turnover for p-nitrophenyl-β-d-xylopyranoside of 111 ± 4 s(-1)), weak α-l-arabinofuranosidase activity (turnover for p-nitrophenyl-α-l-arabinofuranoside of 5 ± 1 s(-1)), and high tolerance to product inhibition (Ki for xylose of 67.6 ± 2.6 mM). Heterologous expression of the entire cluster under the control of the strong constitutive tac promoter in the Corynebacterium glutamicum xylose-fermenting strain X1 enabled the resultant strain X1EFGD to rapidly utilize not only xylooligosaccharides but also arabino-xylooligosaccharides. The ability to utilize arabino-xylooligosaccharides depended on cgR_2369, a gene encoding a multitask ATP-binding protein. Heterologous expression of the contiguous xylD gene in strain X1 led to strain X1D with 10-fold greater β-xylosidase activity than strain X1EFGD, albeit with a total loss of arabino-xylooligosaccharide utilization ability and only half the ability to utilize xylooligosaccharides. The findings suggest some inherent ability of C. glutamicum to take up xylooligosaccharides, an ability that is enhanced by in the presence of a functional xylEFG-encoded xyloside ABC transporter. The finding that xylEFG imparts nonnative ability to take up arabino-xylooligosaccharides should be useful in constructing industrial strains with efficient fermentation of arabinoxylan, a major component of lignocellulosic biomass hydrolysates.
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Recent advances in the metabolic engineering of Corynebacterium glutamicum for the production of lactate and succinate from renewable resources. ACTA ACUST UNITED AC 2015; 42:375-89. [DOI: 10.1007/s10295-014-1538-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 11/06/2014] [Indexed: 02/02/2023]
Abstract
Abstract
Recent increasing attention to environmental issues and the shortage of oil resources have spurred political and industrial interest in the development of environmental friendly and cost-effective processes for the production of bio-based chemicals from renewable resources. Thus, microbial production of commercially important chemicals is viewed as a desirable way to replace current petrochemical production. Corynebacterium glutamicum, a Gram-positive soil bacterium, is one of the most important industrial microorganisms as a platform for the production of various amino acids. Recent research has explored the use of C. glutamicum as a potential cell factory for producing organic acids such as lactate and succinate, both of which are commercially important bulk chemicals. Here, we summarize current understanding in this field and recent metabolic engineering efforts to develop C. glutamicum strains that efficiently produce l- and d-lactate, and succinate from renewable resources.
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30
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Zhou Z, Wang C, Chen Y, Zhang K, Xu H, Cai H, Chen Z. Increasing available NADH supply during succinic acid production by Corynebacterium glutamicum. Biotechnol Prog 2014; 31:12-9. [PMID: 25311136 DOI: 10.1002/btpr.1998] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 10/09/2014] [Indexed: 11/06/2022]
Abstract
A critical factor in the biotechnological production of succinic acid with Corynebacterium glutamicum is the sufficient supply of NADH. It is conceivable that cofactor availability and the proportion of cofactor in the active form may play an important role in dictating the succinic acid yield. PntAB genes from Escherichia coli can directly catalyze the reversible hydride transfer and adjust the dynamic balance between NADP(H) and NAD(H). Hence, we studied the physiological effect of coenzyme systems by expressing the membrane-bound transhydrogenase pntAB genes. We have shown experimentally that the pntAB genes could function as an alternative source of NADH. In an anaerobic fermentation with C. glutamicum NC-3-pntAB, a 16% higher succinic acid yield and a 57% higher production from glucose were obtained by pntAB expression. Moreover, the formation of by-products was significantly decreased. The concomitant increase in the consumption of intracellular NADPH from 0.6 to 1.2 mmol/g CDW and the increased NADH/NAD(+) ratio resulted from introduction of pntAB, suggesting that the membrane-bound transhydrogenase converted excess NADPH to NADH for succinic acid production. Finally, we explored whether the transhydrogenase had different effects on the succinic acid formation on different carbon sources. The succinic acid yield was increased in the presence of pntAB by 16% on glucose, 7% on sucrose, and without large influence on fructose and xylose. The results of this study demonstrated that the effectiveness of cofactor manipulation could be a promising strategy applied in metabolic engineering.
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Affiliation(s)
- Zhihui Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China
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31
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Wang C, Cai H, Zhou Z, Zhang K, Chen Z, Chen Y, Wan H, Ouyang P. Investigation of ptsG gene in response to xylose utilization in Corynebacterium glutamicum. J Ind Microbiol Biotechnol 2014; 41:1249-58. [PMID: 24859809 DOI: 10.1007/s10295-014-1455-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 04/28/2014] [Indexed: 11/26/2022]
Abstract
Corynebacterium glutamicum strains NC-2 were able to grow on xylose as sole carbon sources in our previous work. Nevertheless, it exhibited the major shortcoming that the xylose consumption was repressed in the presence of glucose. So far, regarding C. glutamicum, there are a number of reports on ptsG gene, the glucose-specific transporter, involved in glucose metabolism. Recently, we found ptsG had influence on xylose utilization and investigated the ptsG gene in response to xylose utilization in C. glutamicum with the aim to improve xylose consumption and simultaneously utilized glucose and xylose. The ptsG-deficient mutant could grow on xylose, while exhibiting noticeably reduced growth on xylose as sole carbon source. A mutant deficient in ptsH, a general PTS gene, exhibited a similar phenomenon. When complementing ptsG gene, the mutant ΔptsG-ptsG restored the ability to grow on xylose similarly to NC-2. These indicate that ptsG gene is not only essential for metabolism on glucose but also important in xylose utilization. A ptsG-overexpressing recombinant strain could not accelerate glucose or xylose metabolism. When strains were aerobically cultured in a sugar mixture of glucose and xylose, glucose and xylose could not be utilized simultaneously. Interestingly, the ΔptsG strain could co-utilize glucose and xylose under oxygen-deprived conditions, though the consumption rate of glucose and xylose dramatically declined. It was the first report of ptsG gene in response to xylose utilization in C. glutamicum.
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Affiliation(s)
- Chen Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing, 211816, China
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