1
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Xue Y, Ji X, Li Z, Ma F, Jiang J, Huang Y. NADH-dependent formate dehydrogenase mutants for efficient carbon dioxide fixation. BIORESOURCE TECHNOLOGY 2024; 393:130027. [PMID: 37977496 DOI: 10.1016/j.biortech.2023.130027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 11/19/2023]
Abstract
Bioconversion of CO2 to high-valuable products is a globally pursued sustainable technology for carbon neutrality. However, low CO2 activation with formate dehydrogenase (FDH) remains a major challenge for further upcycling due to the poor CO2 affinity, reduction activity and stability of currently used FDHs. Here, we present two recombined mutants, ΔFDHPa48 and ΔFDHPa4814, which exhibit high CO2 reduction activity and antioxidative activity. Compared to FDHPa, the reduction activity of ΔFDHPa48 was increased up to 743 % and the yield in the reduction of CO2 to methanol was increased by 3.16-fold. Molecular dynamics identified that increasing the width of the substrate pocket of ΔFDHPa48 could improve the enzyme reduction activity. Meanwhile, the enhanced rigidity of C-terminal residues effectively protected the active center. These results fundamentally advanced our understanding of the CO2 activation process and efficient FDH for enzymatic CO2 activation and conversion.
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Affiliation(s)
- Yaju Xue
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuling Ji
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Langfang Technological Centre of Green Industry, Hebei 065001, China
| | - Zhuang Li
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fuqiang Ma
- Medical Enzyme Engineering Center, CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Jiangsu 215163, China
| | - Jingjie Jiang
- Medical Enzyme Engineering Center, CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Jiangsu 215163, China
| | - Yuhong Huang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Langfang Technological Centre of Green Industry, Hebei 065001, China.
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2
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Sapountzaki E, Rova U, Christakopoulos P, Antonopoulou I. Renewable Hydrogen Production and Storage Via Enzymatic Interconversion of CO 2 and Formate with Electrochemical Cofactor Regeneration. CHEMSUSCHEM 2023; 16:e202202312. [PMID: 37165995 DOI: 10.1002/cssc.202202312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/12/2023]
Abstract
The urgent need to reduce CO2 emissions has motivated the development of CO2 capture and utilization technologies. An emerging application is CO2 transformation into storage chemicals for clean energy carriers. Formic acid (FA), a valuable product of CO2 reduction, is an excellent hydrogen carrier. CO2 conversion to FA, followed by H2 release from FA, are conventionally chemically catalyzed. Biocatalysts offer a highly specific and less energy-intensive alternative. CO2 conversion to formate is catalyzed by formate dehydrogenase (FDH), which usually requires a cofactor to function. Several FDHs have been incorporated in bioelectrochemical systems where formate is produced by the biocathode and the cofactor is electrochemically regenerated. H2 production from formate is also catalyzed by several microorganisms possessing either formate hydrogenlyase or hydrogen-dependent CO2 reductase complexes. Combination of these two processes can lead to a CO2 -recycling cycle for H2 production, storage, and release with potentially lower environmental impact than conventional methods.
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Affiliation(s)
- Eleftheria Sapountzaki
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187, Luleå, Sweden
| | - Ulrika Rova
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187, Luleå, Sweden
| | - Paul Christakopoulos
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187, Luleå, Sweden
| | - Io Antonopoulou
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187, Luleå, Sweden
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3
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Villa R, Nieto S, Donaire A, Lozano P. Direct Biocatalytic Processes for CO 2 Capture as a Green Tool to Produce Value-Added Chemicals. Molecules 2023; 28:5520. [PMID: 37513391 PMCID: PMC10383722 DOI: 10.3390/molecules28145520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 07/30/2023] Open
Abstract
Direct biocatalytic processes for CO2 capture and transformation in value-added chemicals may be considered a useful tool for reducing the concentration of this greenhouse gas in the atmosphere. Among the other enzymes, carbonic anhydrase (CA) and formate dehydrogenase (FDH) are two key biocatalysts suitable for this challenge, facilitating the uptake of carbon dioxide from the atmosphere in complementary ways. Carbonic anhydrases accelerate CO2 uptake by promoting its solubility in water in the form of hydrogen carbonate as the first step in converting the gas into a species widely used in carbon capture storage and its utilization processes (CCSU), particularly in carbonation and mineralization methods. On the other hand, formate dehydrogenases represent the biocatalytic machinery evolved by certain organisms to convert CO2 into enriched, reduced, and easily transportable hydrogen species, such as formic acid, via enzymatic cascade systems that obtain energy from chemical species, electrochemical sources, or light. Formic acid is the basis for fixing C1-carbon species to other, more reduced molecules. In this review, the state-of-the-art of both methods of CO2 uptake is assessed, highlighting the biotechnological approaches that have been developed using both enzymes.
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Affiliation(s)
- Rocio Villa
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
- Department of Biotechnology, Delft University of Technology, 2629 HZ Delft, The Netherlands
| | - Susana Nieto
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
| | - Antonio Donaire
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, 30100 Murcia, Spain
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4
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Yao Y, Fu B, Han D, Zhang Y, Wei Z, Liu H. Reduction, evolutionary pattern and positive selection of genes encoding formate dehydrogenase in Wood-Ljungdahl pathway of gastrointestinal acetogens suggests their adaptation to formate-rich habitats. ENVIRONMENTAL MICROBIOLOGY REPORTS 2023; 15:129-141. [PMID: 36779246 PMCID: PMC10103890 DOI: 10.1111/1758-2229.13129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 09/23/2022] [Indexed: 05/20/2023]
Abstract
Acetogens are anaerobes using Wood-Ljungdahl pathway (WLP) as the terminal electron acceptor for both assimilation and dissimilation of CO2 and widely distributed in diverse habitats. However, their habitat adaptation is often unclear. Given that bacterial genome evolution is often the result of environmental selective pressure, hereby we analysed gene copy number, phylogeny and selective pressure of genes involved in WLP within known genomes of 43 species to study the habitat adaption of gastrointestinal acetogens. The gene copy number of formate dehydrogenase (FDH) in gastrointestinal acetogens was much lower than that of non-gastrointestinal acetogens, and in five cases, no FDH genes were found in the genomes of five gastrointestinal acetogens, but that of the other WLP genes showed no difference. The evolutionary pattern of FDH genes was significantly different from that of the other enzymes. Additionally, seven positively selected sites were only identified in the fdhF genes, which means fdhF mutations favoured their adaptation. Collectively, reduction or loss of FDH genes and their evolutionary pattern as well as positive selection in gastrointestinal acetogens indicated their adaptation to formate-rich habitats, implying that FDH genes catalysing CO2 reduction to formate as the first step of methyl branch of WLP may have evolved independently.
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Affiliation(s)
- Ye Yao
- School of Environmental and Civil Engineering, Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction TechnologyJiangnan UniversityWuxiChina
| | - Bo Fu
- School of Environmental and Civil Engineering, Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction TechnologyJiangnan UniversityWuxiChina
- Jiangsu Collaborative Innovation Center of Technology and Material of Water TreatmentSuzhouChina
| | - Dongfei Han
- School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhouPeople's Republic of China
- Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural SciencesBeijingChina
| | - Yan Zhang
- School of Environmental and Civil Engineering, Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction TechnologyJiangnan UniversityWuxiChina
- Jiangsu Collaborative Innovation Center of Technology and Material of Water TreatmentSuzhouChina
| | - Zhiyuan Wei
- Laboratory of Genomic and Precision Medicine, Wuxi School of MedicineJiangnan UniversityWuxiJiangsuChina
| | - He Liu
- School of Environmental and Civil Engineering, Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction TechnologyJiangnan UniversityWuxiChina
- Jiangsu Collaborative Innovation Center of Technology and Material of Water TreatmentSuzhouChina
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5
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Bio-inspired CO2 reduction reaction catalysis using soft-oxometalates. J Inorg Biochem 2022; 234:111903. [DOI: 10.1016/j.jinorgbio.2022.111903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 11/16/2022]
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6
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An T, Kim YK. Effect of selenium and tungsten on cell growth and metabolite production in syngas fermentation using "Clostridium autoethanogenum". J Biotechnol 2022; 356:60-64. [PMID: 35878811 DOI: 10.1016/j.jbiotec.2022.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/16/2022] [Accepted: 07/20/2022] [Indexed: 11/18/2022]
Abstract
The effect of tungsten and selenium on cell growth and production of metabolites such as acetic acid and ethanol when fermenting syngas using "Clostridium autoethanogenum" was investigated to improve the process efficiency. General concentrations of selenium and tungsten in the medium are 0.01µM during acetogenic syngas fermentation. We conducted culture experiments at concentrations of 0, 0.001, 0.01 and 0.1µM for each heavy metal. The effect of selenium on cell growth and total metabolite production was greater than that of tungsten as the effect of selenium on formate dehydrogenase, an important enzyme of the Wood-Ljungdahl pathway, is greater than that of tungsten. Although an increase in tungsten had a marginal effect on total metabolite production, the ethanol/acetic acid production ratio increased significantly due to a decrease in acetic acid and an increase in ethanol production. Thus, tungsten plays a key role in activating aldehyde:ferredoxin oxidoreductase, a key enzyme in the reduction of acetate to ethanol. A specific ethanol productivity of 0.462g ethanol/g DCW∙d was obtained in a culture using 0.01µM selenium and 0.1µM tungsten, which was 2.18 times higher than when using 0.01µM of both selenium and tungsten.
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Affiliation(s)
- Taegwang An
- Department of Chemical Engineering, Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-do 17579, Republic of Korea
| | - Young-Kee Kim
- Department of Chemical Engineering, Research Center of Chemical Technology, Hankyong National University, Anseong, Gyeonggi-do 17579, Republic of Korea.
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7
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Min K, Moon M, Park GW, Lee JP, Kim SJ, Lee JS. Newly explored formate dehydrogenases from Clostridium species catalyze carbon dioxide to formate. BIORESOURCE TECHNOLOGY 2022; 348:126832. [PMID: 35149183 DOI: 10.1016/j.biortech.2022.126832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/03/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
With concerns over global warming and climate change, many efforts have been devoted to mitigate atmospheric CO2 level. As a CO2 utilization strategy, formate dehydrogenase (FDH) from Clostridium species were explored to discover O2-tolerant and efficient FDHs that can catalyze CO2 to formate (i.e. CO2 reductase). With FDH from Clostridium ljungdahlii (ClFDH) that plays as a CO2 reductase previously reported as the reference, FDH from C.autoethanogenum (CaFDH), C. coskatii (CcFDH), and C. ragsdalei (CrFDH) were newly discovered via genome-mining. The FDHs were expressed in Escherichia coli and the recombinant FDHs successfully catalyzed CO2 reduction with a specific activity of 15 U g-1-CaFDH, 17 U g-1-CcFDH, and 8.7 U g-1-CrFDH. Interestingly, all FDHs newly discovered retain their catalytic activity under aerobic condition, although Clostridium species are strict anaerobe. The results discussed herein can contribute to biocatalytic CO2 utilization.
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Affiliation(s)
- Kyoungseon Min
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea.
| | - Myounghoon Moon
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Gwon Woo Park
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Joon-Pyo Lee
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Seon Jeong Kim
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
| | - Jin-Suk Lee
- Gwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), Gwangju 61003, Republic of Korea
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8
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Rouf S, Greish YE, Al-Zuhair S. Immobilization of formate dehydrogenase in metal organic frameworks for enhanced conversion of carbon dioxide to formate. CHEMOSPHERE 2021; 267:128921. [PMID: 33190911 DOI: 10.1016/j.chemosphere.2020.128921] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/13/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
Hydrogenation of carbon dioxide (CO2) to formic acid by the enzyme formate dehydrogenase (FDH) is a promising technology for reducing CO2 concentrations in an environmentally friendly manner. However, the easy separation of FDH with enhanced stability and reusability is essential to the practical and economical implementation of the process. To achieve this, the enzyme must be used in an immobilized form. However, conventional immobilization by physical adsorption is prone to leaching, resulting in low stability. Although other immobilization methods (such as chemical adsorption) enhance stability, they generally result in low activity. In addition, mass transfer limitations are a major problem with most conventional immobilized enzymes. In this review paper, the effectiveness of metal organic frameworks (MOFs) is assessed as a promising alternative support for FDH immobilization. Kinetic mechanisms and stability of wild FDH from various sources were assessed and compared to those of cloned and genetically modified FDH. Various techniques for the synthesis of MOFs and different immobilization strategies are presented, with special emphasis on in situ and post synthetic immobilization of FDH in MOFs for CO2 hydrogenation.
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Affiliation(s)
- Shadeera Rouf
- Chemical and Petroleum Engineering Department, UAE University, 15551, Al Ain, United Arab Emirates
| | - Yasser E Greish
- Chemistry Department, UAE University, 15551, Al Ain, United Arab Emirates
| | - Sulaiman Al-Zuhair
- Chemical and Petroleum Engineering Department, UAE University, 15551, Al Ain, United Arab Emirates.
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9
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Moon M, Park GW, Lee JP, Lee JS, Min K. Recent progress in formate dehydrogenase (FDH) as a non-photosynthetic CO2 utilizing enzyme: A short review. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.101353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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Bulut H, Valjakka J, Yuksel B, Yilmazer B, Turunen O, Binay B. Effect of Metal Ions on the Activity of Ten NAD-Dependent Formate Dehydrogenases. Protein J 2020; 39:519-530. [PMID: 33043425 DOI: 10.1007/s10930-020-09924-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2020] [Indexed: 11/25/2022]
Abstract
NAD-dependent formate dehydrogenase (FDH) enzymes are frequently used in industrial and scientific applications. FDH is a reversible enzyme that reduces the NAD molecule to NADH and produces CO2 by oxidation of the formate ion, whereas it causes CO2 reduction in the reverse reaction. Some transition metal elements - Fe3+, Mo6+ and W6 + - can be found in the FDH structure of anaerobic and archaeal microorganisms, and these enzymes require cations and other redox-active cofactors for their FDH activity. While NAD-dependent FDHs do not necessarily require any metal cations, the presence of various metal cations can still affect FDH activities. To study the effect of 11 different metal ions, NAD-dependent FDH enzymes from ten different microorganisms were tested: Ancylobacter aquaticus (AaFDH), Candida boidinii (CboFDH), Candida methylica (CmFDH), Ceriporiopsis subvermispora (CsFDH), Chaetomium thermophilum (CtFDH), Moraxella sp. (MsFDH), Myceliophthora thermophila (MtFDH), Paracoccus sp. (PsFDH), Saccharomyces cerevisiae (ScFDH) and Thiobacillus sp. (TsFDH). It was found that metal ions (mainly Cu2+ and Zn2+) could have quite strong inhibition effects on several enzymes in the forward reaction, whereas several cations (Li+, Mg2+, Mn2+, Fe3+ and W6+) could increase the forward reaction of two FDHs. The highest activity increase (1.97 fold) was caused by Fe3+ in AaFDH. The effect on the reverse reaction was minimal. The modelled structures of ten FDHs showed that the active site is formed by 15 highly conserved amino acid residues spatially settling around the formate binding site in a conserved way. However, the residue differences at some of the sites close to the substrate do not explain the activity differences. The active site space is very tight, excluding water molecules, as observed in earlier studies. Structural examination indicated that smaller metal ions might be spaced close to the active site to affect the reaction. Metal ion size showed partial correlation to the effect on inhibition or activation. Affinity of the substrate may also affect the sensitivity to the metal's effect. In addition, amino acid differences on the protein surface may also be important for the metal ion effect.
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Affiliation(s)
- Huri Bulut
- Medical Biochemistry Department, Faculty of Medicine, Istinye University, Istanbul, Turkey
| | - Jarkko Valjakka
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Busra Yuksel
- Molecular Biology and Genetics Department, Istanbul Technical University, Istanbul, Turkey
| | - Berin Yilmazer
- Molecular Biology and Genetics Department, Gebze Technical University, Kocaeli, Turkey
| | - Ossi Turunen
- School of Forest Sciences, Faculty of Science and Forestry, University of Eastern Finland, Joensuu, Finland
| | - Baris Binay
- Department of Bioengineering, Gebze Technical University, Kocaeli, Turkey.
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11
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Duman ZE, Duraksoy BB, Aktaş F, Woodley JM, Binay B. High-level heterologous expression of active Chaetomium thermophilum FDH in Pichia pastoris. Enzyme Microb Technol 2020; 137:109552. [PMID: 32423672 DOI: 10.1016/j.enzmictec.2020.109552] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/14/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023]
Abstract
Nowadays, the use of formate dehydrogenase (FDH, EC 1.17.1.9) is well established as a means of NADH regeneration from NAD+ via the coupled conversion of formate into carbon dioxide. Recent studies have been reported that specifically Chaetomium thermophilum FDH (CtFDH) is the most efficient FDH catalyzing this reaction in reverse (i.e. using CO2 as a substrate to produce formate, and thereby regenerating NAD+). However, to date the production of active CtFDH at high protein expression levels has received relatively little attention. In this study, we have tested the effect of batch and high cell density fermentation (HCDF) strategies in a small stirred fermenter, as well as the effect of supplementing the medium with casamino acids, on the expressed level of secreted CtFDH using P. pastoris. We have established that the amount of expressed CtFDH was indeed enhanced via a HCDF strategy and that extracellular protease activity was eliminated via the addition of casamino acids into the fermentation medium. On this basis, secreted CtFDH in an active form can be easily separated from the fermentation and can be used for subsequent biotechnological applications.
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Affiliation(s)
- Zeynep Efsun Duman
- Department of Bioengineering, Gebze Technical University, 41400, Gebze, Kocaeli, Turkey; Enzyme Consultancy and Identification Center (ETDAM), Gebze Technical University, 41400, Gebze, Kocaeli, Turkey
| | - Bedri Burak Duraksoy
- Department of Chemistry, Gebze Technical University, 41400, Gebze, Kocaeli, Turkey; Enzyme Consultancy and Identification Center (ETDAM), Gebze Technical University, 41400, Gebze, Kocaeli, Turkey
| | - Fatih Aktaş
- Department of Environmental Engineering, Düzce University, 81620, Düzce, Turkey
| | - John M Woodley
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark.
| | - Barış Binay
- Department of Bioengineering, Gebze Technical University, 41400, Gebze, Kocaeli, Turkey; Enzyme Consultancy and Identification Center (ETDAM), Gebze Technical University, 41400, Gebze, Kocaeli, Turkey.
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12
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Yildirim D, Alagöz D, Toprak A, Tükel S, Fernandez-Lafuente R. Tuning dimeric formate dehydrogenases reduction/oxidation activities by immobilization. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Fernández-Naveira Á, Veiga MC, Kennes C. Selective anaerobic fermentation of syngas into either C 2-C 6 organic acids or ethanol and higher alcohols. BIORESOURCE TECHNOLOGY 2019; 280:387-395. [PMID: 30780099 DOI: 10.1016/j.biortech.2019.02.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/31/2019] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Clostridium carboxidivorans produces alcohols from C1 gases (CO, CO2), converting them first into fatty acids, and subsequently into alcohols. This research identified conditions that allow to selectively produce either fatty acids or alcohols. The conversion of gases into acids and then into alcohols is catalysed by metalloenzymes, stimulated by specific trace metals. Therefore, different bioreactors were set-up, either with or without addition of tungsten (W) or selenium (Se) and at different pHs. Combining the presence of those trace metals with a low pH (5.0) allowed to accumulate high amounts of alcohols as major end products (8038 mg/L total alcohols; 3027 mg/L total acids). Instead, maintaining a higher pH (6.2), in the absence of those trace metals, allowed to selectively produce organic acids (9577 mg/L) and almost no alcohols (676 mg/L). Omitting W, but not Se, at high pH (6.2), led to a still higher concentration of acids (11303 mg/L).
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Affiliation(s)
- Ánxela Fernández-Naveira
- Chemical Engineering Laboratory, Faculty of Sciences and Center for Advanced Scientific Research (CICA), University of La Coruña, Rúa da Fraga 10, E-15008 La Coruña, Spain
| | - María C Veiga
- Chemical Engineering Laboratory, Faculty of Sciences and Center for Advanced Scientific Research (CICA), University of La Coruña, Rúa da Fraga 10, E-15008 La Coruña, Spain
| | - Christian Kennes
- Chemical Engineering Laboratory, Faculty of Sciences and Center for Advanced Scientific Research (CICA), University of La Coruña, Rúa da Fraga 10, E-15008 La Coruña, Spain.
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