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Hengsbach J, Cwienczek M, Laudensack W, Stiefelmaier J, Tippkötter N, Ulber R. Succinic Acid Production With Actinobacillus succinogenes -Influence of an Electric Potential on the Intercellular NADH/NAD + Balance. Eng Life Sci 2025; 25:e202400053. [PMID: 39801561 PMCID: PMC11717146 DOI: 10.1002/elsc.202400053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 10/01/2024] [Accepted: 10/31/2024] [Indexed: 01/16/2025] Open
Abstract
Bioelectrochemical systems (BESs) offer a sustainable method for chemical production, including the enhanced production of succinic acid. By combining fermentation with BES, it could be possible to achieve sustainable succinic acid production and CO2 fixation using Actinobacillus succinogenes. In literature, the potential application of BES is commonly associated with increased succinate yields, as it is expected to enhance the availability of NADH, thereby influencing the intracellular nicotinamide adenine dinucleotide (NADH/NAD+) balance. However, it remains unclear whether BES can improve NADH regeneration and achieve higher NADH/NAD+ ratios across all growth phases of A. succinogenes. This study investigates the impact of an applied electrical potential on the intracellular NADH/NAD+ ratio during an electrochemical-assisted fermentation process. Using an adapted high-performance liquid chromatography method with a Supelcosil LC-18-T column, it was demonstrated that NADH availability in BES, particularly during the stationary growth phase, improved by up to 1.98-fold compared to the control. This enhancement in reducing power led to a succinate yield of 0.747 ± 0.01 g g-1, representing a 15.65% increase compared to a fermentation without electrochemical assistance. These findings support the expectation that the use of BES could enhance the competitiveness of bio-based succinate production.
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Affiliation(s)
- Jan‐Niklas Hengsbach
- Mechanical and Process EngineeringRPTU Kaiserslautern‐LandauKaiserslauternGermany
| | - Marcel Cwienczek
- Mechanical and Process EngineeringRPTU Kaiserslautern‐LandauKaiserslauternGermany
| | - Wolfgang Laudensack
- Mechanical and Process EngineeringRPTU Kaiserslautern‐LandauKaiserslauternGermany
| | - Judith Stiefelmaier
- Mechanical and Process EngineeringRPTU Kaiserslautern‐LandauKaiserslauternGermany
| | - Nils Tippkötter
- Bioprocess Engineering and Downstream ProcessingUniversity of Applied Science AachenJülichGermany
| | - Roland Ulber
- Mechanical and Process EngineeringRPTU Kaiserslautern‐LandauKaiserslauternGermany
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2
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Lin F, Li W, Wang D, Hu G, Qin Z, Xia X, Hu L, Liu X, Luo R. Advances in succinic acid production: the enhancement of CO 2 fixation for the carbon sequestration benefits. Front Bioeng Biotechnol 2024; 12:1392414. [PMID: 38605985 PMCID: PMC11007169 DOI: 10.3389/fbioe.2024.1392414] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 03/18/2024] [Indexed: 04/13/2024] Open
Abstract
Succinic acid (SA), one of the 12 top platform chemicals produced from biomass, is a precursor of various high value-added derivatives. Specially, 1 mol CO2 is assimilated in 1 mol SA biosynthetic route under anaerobic conditions, which helps to achieve carbon reduction goals. In this review, methods for enhanced CO2 fixation in SA production and utilization of waste biomass for SA production are reviewed. Bioelectrochemical and bioreactor coupling systems constructed with off-gas reutilization to capture CO2 more efficiently were highlighted. In addition, the techno-economic analysis and carbon sequestration benefits for the synthesis of bio-based SA from CO2 and waste biomass are analyzed. Finally, a droplet microfluidics-based high-throughput screening technique applied to the future bioproduction of SA is proposed as a promising approach.
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Affiliation(s)
| | | | - Dan Wang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
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3
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Nagime PV, Upaichit A, Cheirsilp B, Boonsawang P. Isolation and screening of microorganisms for high yield of succinic acid production. Biotechnol Appl Biochem 2022. [PMID: 36536601 DOI: 10.1002/bab.2428] [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: 05/17/2022] [Accepted: 12/03/2022] [Indexed: 12/24/2022]
Abstract
This study involves the isolation of succinic acid (SA)-producing microorganisms from different samples, including the rumen, sludge, soil, and wastewater. For primary screening, 29 isolates exhibited a zone of clearance around the colony, indicating acid production. For secondary screening using thin-layer chromatography, only two isolates symbolized SA production according to their Rf values. These two isolates were further identified as Bacillus velezensis and Enterococcus gallinarum by phylogenetic analysis using the neighbor-joining method. The high SA concentrations of 50.2 and 66.9 g/L were produced by B. velezensis and E. gallinarum with an SA yield of 0.836 and 1.12 g/g glucose, respectively. The high SA concentration from these newly isolated strains was achieved with a low formation of unwanted acids compared with those from Actinobacillus succinogenes ATCC 55618. Moreover, E. gallinarum was cultured in palm oil mill wastewater (POMW) and molasses, which were cheap substrates. The high SA production of 73.9 g/L with low other acids (the ratio of SA to total acids = 0.917) was achieved using POMW and molasses (80:20) as substrates.
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Affiliation(s)
- Pooja Vilas Nagime
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Apichat Upaichit
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Benjamas Cheirsilp
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Piyarat Boonsawang
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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4
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Xue SJ, Zhang JR, Zhang RX, Qin Y, Yang XB, Jin GJ, Tao YS. Oxidation-reduction potential affects medium-chain fatty acid ethyl ester production during wine alcohol fermentation. Food Res Int 2022; 157:111369. [DOI: 10.1016/j.foodres.2022.111369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 05/04/2022] [Accepted: 05/10/2022] [Indexed: 12/24/2022]
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5
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Fermentation redox potential control on the 1,3-propanediol production by Lactobacillus panis PM1. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Hao T, Li G, Zhou S, Deng Y. Engineering the Reductive TCA Pathway to Dynamically Regulate the Biosynthesis of Adipic Acid in Escherichia coli. ACS Synth Biol 2021; 10:632-639. [PMID: 33687200 DOI: 10.1021/acssynbio.0c00648] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Adipic acid is a versatile aliphatic dicarboxylic acid. It is applied mainly in the polymerization of nylon-6,6, which accounts for 50.8% of the global consumption market of adipic acid. The microbial production of adipic acid avoids the usage of petroleum resources and the emission of harmful nitrogen oxides that are generated by traditional chemical synthetic approaches. However, in the fermentation process, the low theoretical yield and the usage of expensive inducers hinders the large-scale industrial production of adipic acid. To overcome these challenges, we established an oxygen-dependent dynamic regulation (ODDR) system to control the expression of key genes (sucD, pyc, mdh, and frdABCD) that could be induced to enhance the metabolic flux of the reductive TCA pathway under anaerobic conditions. Coupling of the constitutively expressed adipic acid synthetic pathway not only avoids the use of inducers but also increases the theoretical yield by nearly 50%. After the gene combination and operon structure were optimized, the reaction catalyzed by frdABCD was found to be the rate-limiting step. Further optimizing the relative expression levels of sucD, pyc, and frdABCD improved the titer of adipic acid 41.62-fold compared to the control strain Mad1415, demonstrating the superior performance of our ODDR system.
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Affiliation(s)
- Tingting Hao
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Guohui Li
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Shenghu Zhou
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
| | - Yu Deng
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
- Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China
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7
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Importance of consideration of oxidoreduction potential as a critical quality parameter in food industries. Food Res Int 2020; 132:109108. [PMID: 32331669 DOI: 10.1016/j.foodres.2020.109108] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/14/2020] [Accepted: 02/16/2020] [Indexed: 12/11/2022]
Abstract
There are many intrinsic and extrinsic factors affecting the nutritional, organoleptic, microbial-enzymatic and physicochemical characteristics of food products. Some of these factors are commonly considered by food processors such as the temperature, water activity, pH, dissolved oxygen and chemical composition, while others are less considered such as the oxidoreduction potential (Eh). This latter factor is an intrinsic electrochemical parameter expressing the tendency of the substance/medium to give or receive electrons. Contrary to what is expected, the important role of Eh is not limited to inorganic chemistry, metallic chemistry, natural water, and wastewater treatment fields but it also covers many domains in biology such as metabolic engineering, enzymatic functions, food safety, and biotechnology. Unfortunately, although the critical roles of Eh in several key reactions occurred in biological media such as food and biotechnological products, its application or controlling is still uncommon or mis-considered by food processors. The lack of specific studies and reviews concerning the Eh and its influences on the quality parameters of products could be a reason for this lack of interest from the side of food processors. Recent studies reported the potential application of this parameter in novel food processing techniques such as reducing atmosphere drying (RAD) of food products and reducing atmosphere packaging (RAP) of fresh food products for preserving the quality attributes and extending the shelf-life of food products. This paper aims to help the technical and operational personnel working in food industry sectors as well as the scientific community to have an updated and a comprehensible review about the Eh parameter permitting its consideration for potential applications in food industries.
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8
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Two Phase Anaerobic Digestion System of Municipal Solid Waste by Utilizing Microaeration and Granular Activated Carbon. ENERGIES 2020. [DOI: 10.3390/en13040933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In an anaerobic digestion (AD) process, the hydrolysis phase is often limited when substrates with high concentrations of solids are used. We hypothesized that applying micro-aeration in the hydrolysis phase and the application of granular activated carbon (GAC) in the methanogenesis phase could make the AD process more efficient. A packed bed reactor (PBR) coupled with an up-flow anaerobic sludge blanket (UASB) was conducted, and its effects on methane generation were evaluated. The micro-aeration rate applied in PBR was 254 L-air/kg-Total solids (TS)-d was compared with a control reactor. Micro-aeration showed that it reduced the hydrolysis time and increased the organic matter solubilization as chemical oxygen demand (COD) increasing 200%, with a volatile fatty acids (VFAs) increment higher than 300%, compared to the control reactor (without aeration). Our findings revealed that the implementations of microaeration and GAC in the two-phase AD system could enhance methane production by reducing hydrolysis time, increasing solid waste solubilization.
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9
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Zhang W, Zhang T, Song M, Dai Z, Zhang S, Xin F, Dong W, Ma J, Jiang M. Metabolic Engineering of Escherichia coli for High Yield Production of Succinic Acid Driven by Methanol. ACS Synth Biol 2018; 7:2803-2811. [PMID: 30300546 DOI: 10.1021/acssynbio.8b00109] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methanol is increasingly becoming an attractive carbon feedstock for the production of various biochemicals due to its high abundance and low price. In this study, when methanol assimilation module was introduced into succinic acid producing Escherichia coli by employing the NAD-dependent methanol dehydrogenase from Bacillus methanolicus and ribulose monophosphate pathway from different donor organisms, succinic acid yield was increased from 0.91 ± 0.08 g/g to 0.98 ± 0.11 g/g with methanol as an auxiliary substrate under the anaerobic fermentation. Further 13C-labeling experiments showed that the recombinant strain successfully converted methanol into succinic acid, as the carbon atom of carboxyl group in succinic acid was labeled by 13C. It was found that the NADH generated by methanol oxidation would benefit succinate production, as the NADH/NAD+ ratio in vivo was decreased from 0.67 to 0.45 in the engineered strain, indicating that the efficiency of succinic acid synthesis was significantly improved when driven by methanol. This study represents a successful case for the development of reducing chemical production using methanol as an auxiliary substrate.
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Affiliation(s)
- Wenming Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800, PR China
| | - Ting Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Meng Song
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Zhongxue Dai
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Shangjie Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Fengxue Xin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800, PR China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800, PR China
| | - Jiangfeng Ma
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211800, PR China
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10
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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: 0.4] [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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11
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Mika LT, Cséfalvay E, Németh Á. Catalytic Conversion of Carbohydrates to Initial Platform Chemicals: Chemistry and Sustainability. Chem Rev 2017; 118:505-613. [DOI: 10.1021/acs.chemrev.7b00395] [Citation(s) in RCA: 662] [Impact Index Per Article: 82.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- László T. Mika
- Department
of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest 1111, Hungary
| | - Edit Cséfalvay
- Department
of Energy Engineering, Budapest University of Technology and Economics, Budapest 1111, Hungary
| | - Áron Németh
- Department
of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, Budapest 1111, Hungary
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12
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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: 0.6] [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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13
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Gao J, Yuan W, Li Y, Bai F, Zhong S, Jiang Y. Application of redox potential control to improve ethanol productivity from inulin by consolidated bioprocessing. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.07.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Sadhukhan S, Villa R, Sarkar U. Microbial production of succinic acid using crude and purified glycerol from a Crotalaria juncea based biorefinery. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2016; 10:84-93. [PMID: 28352528 PMCID: PMC5040874 DOI: 10.1016/j.btre.2016.03.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 02/08/2016] [Accepted: 03/31/2016] [Indexed: 11/23/2022]
Abstract
Microbial conversion of crude and purified glycerol obtained in the process of biorefining Crotalaria juncea is carried out to produce succinic acid using Escherichia coli. Batch tests are performed for nine different substrate concentrations of commercial, purified and crude glycerol, in order to observe cell growth and substrate utilization rate. Inhibitory (Halden-Andrew, Aiba-Edward, Tessier type and Andrews) as well as non-inhibitory (Monod, Moser and Tessier) models are fitted to the relationship between specific growth rate and substrate concentration obtained from the growth curves. Considering the inhibition effect, Aiba-Edward model ranked 1 out of 7 in case of two samples and Haldane-Andrew model ranked 1 in case of one sample. Aiba-Edward model gave the best fitment for a large range of concentrations of all the three types of glycerol, crude, purified and laboratory grade. Maximum production of succinic acid is obtained from commercial glycerol at pH 7 and 37.5 °C.
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Affiliation(s)
- Suvra Sadhukhan
- Department of Chemical Engineering, Jadavpur University, Kolkata 700032, India
| | - Raffaella Villa
- School of Energy, Environment and Agrifood, Cranfield University, Beds MK43 0AL, United Kingdom
| | - Ujjaini Sarkar
- Department of Chemical Engineering, Jadavpur University, Kolkata 700032, India
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15
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Improved production of propionic acid in Propionibacterium jensenii via combinational overexpression of glycerol dehydrogenase and malate dehydrogenase from Klebsiella pneumoniae. Appl Environ Microbiol 2015; 81:2256-64. [PMID: 25595755 DOI: 10.1128/aem.03572-14] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Microbial production of propionic acid (PA), an important chemical building block used as a preservative and chemical intermediate, has gained increasing attention for its environmental friendliness over traditional petrochemical processes. In previous studies, we constructed a shuttle vector as a useful tool for engineering Propionibacterium jensenii, a potential candidate for efficient PA synthesis. In this study, we identified the key metabolites for PA synthesis in P. jensenii by examining the influence of metabolic intermediate addition on PA synthesis with glycerol as a carbon source under anaerobic conditions. We also further improved PA production via the overexpression of the identified corresponding enzymes, namely, glycerol dehydrogenase (GDH), malate dehydrogenase (MDH), and fumarate hydratase (FUM). Compared to those in wild-type P. jensenii, the activities of these enzymes in the engineered strains were 2.91- ± 0.17- to 8.12- ± 0.37-fold higher. The transcription levels of the corresponding enzymes in the engineered strains were 2.85- ± 0.19- to 8.07- ± 0.63-fold higher than those in the wild type. The coexpression of GDH and MDH increased the PA titer from 26.95 ± 1.21 g/liter in wild-type P. jensenii to 39.43 ± 1.90 g/liter in the engineered strains. This study identified the key metabolic nodes limiting PA overproduction in P. jensenii and further improved PA titers via the coexpression of GDH and MDH, making the engineered P. jensenii strain a potential industrial producer of PA.
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16
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Zhuge X, Li J, Shin HD, Liu L, Du G, Chen J. Improved propionic acid production with metabolically engineered Propionibacterium jensenii by an oxidoreduction potential-shift control strategy. BIORESOURCE TECHNOLOGY 2015; 175:606-612. [PMID: 25453933 DOI: 10.1016/j.biortech.2014.10.038] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 10/08/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
In this study, a three-stage oxidoreduction potential (ORP) control strategy was developed to improve propionic acid (PA) production using engineered Propionibacterium jensenii ATCC 4868 (pZGX04-gldA) in a 3-L bioreactor. Specifically, ORP was controlled at -200mV from 0 to 36h, -300mV from 36 to 156h, and -400mV after 156h. The PA titer increased from 21.38 to 27.31g/L. The effects of ORP regulation on key intracellular metabolites were studied, demonstrating that ORP can both regulate NADH/NAD(+) ratio and the activities of some enzymes involved in electron transport and redistribute metabolic flux. We integrated the ORP control strategy with a fed-batch culture method and increased PA production to 39.53g/L. This new ORP control strategy may be useful in the optimization of other anaerobic processes.
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Affiliation(s)
- Xin Zhuge
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Wuxi 214122, China
| | - Jianghua Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Wuxi 214122, China
| | - Hyun-Dong Shin
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta 30332, USA
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Wuxi 214122, China.
| | - Guocheng Du
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China; Synergetic Innovation Center of Food Safety and Nutrition, Wuxi 214122, China.
| | - Jian Chen
- Synergetic Innovation Center of Food Safety and Nutrition, Wuxi 214122, China; National Engineering of Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi 214122, China
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