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Zhang X, Joyce GH, Leu AO, Zhao J, Rabiee H, Virdis B, Tyson GW, Yuan Z, McIlroy SJ, Hu S. Multi-heme cytochrome-mediated extracellular electron transfer by the anaerobic methanotroph 'Candidatus Methanoperedens nitroreducens'. Nat Commun 2023; 14:6118. [PMID: 37777538 PMCID: PMC10542353 DOI: 10.1038/s41467-023-41847-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 09/18/2023] [Indexed: 10/02/2023] Open
Abstract
Anaerobic methanotrophic archaea (ANME) carry out anaerobic oxidation of methane, thus playing a crucial role in the methane cycle. Previous genomic evidence indicates that multi-heme c-type cytochromes (MHCs) may facilitate the extracellular electron transfer (EET) from ANME to different electron sinks. Here, we provide experimental evidence supporting cytochrome-mediated EET for the reduction of metals and electrodes by 'Candidatus Methanoperedens nitroreducens', an ANME acclimated to nitrate reduction. Ferrous iron-targeted fluorescent assays, metatranscriptomics, and single-cell imaging suggest that 'Ca. M. nitroreducens' uses surface-localized redox-active cytochromes for metal reduction. Electrochemical and Raman spectroscopic analyses also support the involvement of c-type cytochrome-mediated EET for electrode reduction. Furthermore, several genes encoding menaquinone cytochrome type-c oxidoreductases and extracellular MHCs are differentially expressed when different electron acceptors are used.
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Affiliation(s)
- Xueqin Zhang
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia
| | - Georgina H Joyce
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Australia
| | - Andy O Leu
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Australia
| | - Jing Zhao
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia
- Ecological Engineering of Mine Wastes, Sustainable Minerals Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Hesamoddin Rabiee
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia
- Centre for Future Materials, University of Southern Queensland, Springfield, QLD, Australia
| | - Bernardino Virdis
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia
| | - Gene W Tyson
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Australia
| | - Zhiguo Yuan
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia
- School of Energy and Environment, City University of Hong Kong, Hong Kong SAR, China
| | - Simon J McIlroy
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Australia
| | - Shihu Hu
- Australian Centre for Water and Environmental Biotechnology (ACWEB), Faculty of Engineering, Architecture and Information Technology, University of Queensland, Brisbane, Australia.
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2
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Deng X, Okamoto A. Direct extracellular electron transfer to an indium tin doped oxide electrode via heme redox reactions in Desulfovibrio ferrophilus IS5. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Yi Y, Liang A, Luo L, Zang Y, Zhao H, Luo A. A novel real-time TMAO detection method based on microbial electrochemical technology. Bioelectrochemistry 2022; 144:108038. [PMID: 34906816 DOI: 10.1016/j.bioelechem.2021.108038] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 12/04/2021] [Accepted: 12/06/2021] [Indexed: 01/30/2023]
Abstract
Trimethylamine N-oxide (TMAO) is considered to be a novel biomarker of cardiovascular diseases. However, the traditional TMAO detection method has failed to meet the requirements of real-time and point-of-care tests. Herein, a novel TMAO detection method based on microbial electrochemical technology is established, which realizes the direct conversion of TMAO concentration into electrical signals. Attached Shewanella loihica PV-4 was first proven to be capable of simultaneous inward extracellular electron transfer and TMAO reduction. The TMAO detection method showed a wide linear range of 0 to 250 μM, a high sensitivity of 23.92 μA/mM, and a low limit of detection of 5.96 μM. In addition, the TMAO detection process was accomplished within 600 s, with an acceptable accuracy of 90% in the real serum, showing high feasibility in clinical applications.
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Affiliation(s)
- Yue Yi
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Axin Liang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Lin Luo
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Yuxuan Zang
- Institute of Environmental Biology and Life Support Technology, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
| | - Hongyu Zhao
- Institute of Environmental Biology and Life Support Technology, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
| | - Aiqin Luo
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, Beijing Institute of Technology, Beijing 100081, China.
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4
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Thapa BS, Kim T, Pandit S, Song YE, Afsharian YP, Rahimnejad M, Kim JR, Oh SE. Overview of electroactive microorganisms and electron transfer mechanisms in microbial electrochemistry. BIORESOURCE TECHNOLOGY 2022; 347:126579. [PMID: 34921921 DOI: 10.1016/j.biortech.2021.126579] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/10/2021] [Accepted: 12/11/2021] [Indexed: 06/14/2023]
Abstract
Electroactive microorganisms acting as microbial electrocatalysts have intrinsic metabolisms that mediate a redox potential difference between solid electrodes and microbes, leading to spontaneous electron transfer to the electrode (exo-electron transfer) or electron uptake from the electrode (endo-electron transfer). These microbes biochemically convert various organic and/or inorganic compounds to electricity and/or biochemicals in bioelectrochemical systems (BESs) such as microbial fuel cells (MFCs) and microbial electrosynthesis cells (MECs). For the past two decades, intense studies have converged to clarify electron transfer mechanisms of electroactive microbes in BESs, which thereby have led to improved bioelectrochemical performance. Also, many novel exoelectrogenic eukaryotes as well as prokaryotes with electroactive properties are being continuously discovered. This review presents an overview of electroactive microorganisms (bacteria, microalgae and fungi) and their exo- and endo-electron transfer mechanisms in BESs for optimizing and advancing bioelectrochemical techniques.
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Affiliation(s)
- Bhim Sen Thapa
- Department of Biological Environment, Kangwon National University, Chuncheon, Gangwondo 24341, Republic of Korea
| | - Taeyoung Kim
- Department of Environmental Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Soumya Pandit
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida 201306, India
| | - Young Eun Song
- Advanced Biofuel and Bioproducts Process Development Unit, Lawrence Berkeley National Laboratory, Emeryville, CA 94608, USA
| | - Yasamin Pesaran Afsharian
- Biofuel and Renewable Energy Research Center, Chemical Engineering Department, Babol Noshirvani University of Technology, Babol, Iran
| | - Mostafa Rahimnejad
- Biofuel and Renewable Energy Research Center, Chemical Engineering Department, Babol Noshirvani University of Technology, Babol, Iran
| | - Jung Rae Kim
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Sang-Eun Oh
- Department of Biological Environment, Kangwon National University, Chuncheon, Gangwondo 24341, Republic of Korea.
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5
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Involvement of Proton Transfer for Carbon Dioxide Reduction Coupled with Extracellular Electron Uptake in
Shewanella oneidensis
MR‐1. ELECTROANAL 2020. [DOI: 10.1002/elan.201900686] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Li C, Cheng S. Functional group surface modifications for enhancing the formation and performance of exoelectrogenic biofilms on the anode of a bioelectrochemical system. Crit Rev Biotechnol 2019; 39:1015-1030. [PMID: 31496297 DOI: 10.1080/07388551.2019.1662367] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Various new energy technologies have been developed to reduce reliance on fossil fuels. The bioelectrochemical system (BES), an integrated microbial-electrochemical energy conversion process, is projected to be a sustainable and environmentally friendly energy technology. However, low power density is still one of the main limiting factors restricting the practical application of BESs. To enhance power output, functional group modification on anode surfaces has been primarily developed to improve the bioelectrochemical performances of BESs in terms of startup, power density, chemical oxygen demand (COD) removal and coulombic efficiency (CE). This modification could change the anode surface characteristics: roughness, hydrophobicity, biocompatibility, chemical bonding and electrochemically active surface area. This will facilitate bacterial adhesion, biofilm formation and extracellular electron transfer (EET). Additionally, some antibacterial functional groups are applied on air cathodes in order to suppress aerobic biofilms and enhance cathodic oxygen reduction reactions (ORRs). Various modification strategies such as: soaking, heat treatment and plasma modification have been reported to introduce functional groups typically as O-, N- and S-containing groups. In this review, the effects of anode functional groups on electroactive bacteria through the whole biofilm formation process are summarized. In addition, the application of those modification technologies to improve bioelectricity generation, resource recovery, bioelectrochemical analysis and the production of value-added chemicals and biofuels is also discussed. Accordingly, this review aims to help scientists select the most appropriate functional groups and up-to-date methods to improve biofilm formation.
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Affiliation(s)
- Chaochao Li
- State Key Laboratory of Clean Energy Utilization, Zhejiang University , Hangzhou , China
| | - Shaoan Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University , Hangzhou , China
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7
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LUO X, WU Y, LIU T, LI F, LI X, CHEN D, WANG Y. Quantifying Redox Dynamics of c-Type Cytochromes in a Living Cell Suspension of Dissimilatory Metal-reducing Bacteria. ANAL SCI 2019; 35:315-321. [DOI: 10.2116/analsci.18p394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Xiaobo LUO
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
- University of Chinese Academy of Sciences
| | - Yundang WU
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
| | - Tongxu LIU
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
| | - Fangbai LI
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
| | - Xiaomin LI
- The Environmental Research Institute, MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University
| | - Dandan CHEN
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
| | - Ying WANG
- Guangdong Institute of Eco-environmental Science & Technology, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management
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8
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Naradasu D, Miran W, Sakamoto M, Okamoto A. Isolation and Characterization of Human Gut Bacteria Capable of Extracellular Electron Transport by Electrochemical Techniques. Front Microbiol 2019; 9:3267. [PMID: 30697198 PMCID: PMC6340925 DOI: 10.3389/fmicb.2018.03267] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 12/17/2018] [Indexed: 01/09/2023] Open
Abstract
Microorganisms are known to exhibit extracellular electron transfer (EET) in a wide variety of habitats. However, as for the human microbiome which significantly impacts our health, the role and importance of EET has not been widely investigated. In this study, we enriched and isolated the EET-capable bacteria from human gut microbes using an electrochemical enrichment method and examined whether the isolates couple EET with anaerobic respiration or fermentation. Upon the use of energy-rich or minimum media (with acetate or lactate) for electrochemical enrichment with the human gut sample at an electrode potential of +0.4 V [vs. the standard hydrogen electrode (SHE)], both culture conditions showed significant current production. However, EET-capable pure strains were enriched specifically with minimum media, and subsequent incubation using the δ-MnO2-agar plate with lactate or acetate led to the isolation of two EET-capable microbial strains, Gut-S1 and Gut-S2, having 99% of 16S rRNA gene sequence identity with Enterococcus avium (E. avium) and Klebsiella pneumoniae (K. pneumoniae), respectively. While the enrichment involved anaerobic respiration with acetate and lactate, further electrochemistry with E. avium and K. pneumoniae revealed that the glucose fermentation was also coupled with EET. These results indicate that EET couples not only with anaerobic respiration as found in environmental bacteria, but also with fermentation in the human gut.
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Affiliation(s)
- Divya Naradasu
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Japan.,Department of Advanced Interdisciplinary Studies, Research Center for Advanced Science and Technology, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Waheed Miran
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Japan
| | - Mitsuo Sakamoto
- Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Japan.,PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Japan
| | - Akihiro Okamoto
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Japan.,PRIME, Japan Agency for Medical Research and Development (AMED), Tsukuba, Japan.,Center for Sensor and Actuator Material, National Institute for Materials Science (NIMS), Tsukuba, Japan
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9
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Takeuchi R, Sugimoto Y, Kitazumi Y, Shirai O, Ogawa J, Kano K. Electrochemical Study on the Extracellular Electron Transfer Pathway from Shewanella Strain Hac319 to Electrodes. ANAL SCI 2018; 34:1177-1182. [PMID: 29910222 DOI: 10.2116/analsci.18p237] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Shewanella can transfer electrons to various extracellular electron acceptors. We electrochemically investigated the pathway of extracellular electron transfer from Shewanella strain Hac319 to electrodes. A resting cell suspension of Shewanella strain Hac319 containing lactate produced a steady-state sigmoidal wave in the presence of flavin mononucleotide (FMN) in cyclic voltammetry, but not in the absence of FMN. A harvested cell suspension without cell-washing also produced a similar catalytic wave without any external addition of free FMN. The midpoint potentials of the two sigmoidal waves were identical to the redox potential of free FMN. The data indicate that FMN secreted from the Shewanella strain Hac319 works as an electron-transfer mediator from the cell to electrodes. An addition of cyanide to a resting cell suspension of Shewanella strain Hac319 increased the rate of the FMN reduction in the presence of lactate, while it decreased the respiration rate. By considering the fact that cyanide is coordinated to the heme moiety of hemoproteins and shifts the redox potential to the negative potential side, the data indicate that the electron derived from lactate is predominantly transferred in a down-hill mode from an electron donor with a redox potential more negative than that of FMN without going through outer membrane cytochromes c molecules.
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Affiliation(s)
- Ryosuke Takeuchi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Yu Sugimoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Yuki Kitazumi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Osamu Shirai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Jun Ogawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Kenji Kano
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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10
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Kawaichi S, Yamada T, Umezawa A, McGlynn SE, Suzuki T, Dohmae N, Yoshida T, Sako Y, Matsushita N, Hashimoto K, Nakamura R. Anodic and Cathodic Extracellular Electron Transfer by the Filamentous Bacterium Ardenticatena maritima 110S. Front Microbiol 2018; 9:68. [PMID: 29467724 PMCID: PMC5808234 DOI: 10.3389/fmicb.2018.00068] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 01/11/2018] [Indexed: 11/13/2022] Open
Abstract
Ardenticatena maritima strain 110S is a filamentous bacterium isolated from an iron-rich coastal hydrothermal field, and it is a unique isolate capable of dissimilatory iron or nitrate reduction among the members of the bacterial phylum Chloroflexi. Here, we report the ability of A. maritima strain 110S to utilize electrodes as a sole electron acceptor and donor when coupled with the oxidation of organic compounds and nitrate reduction, respectively. In addition, multicellular filaments with hundreds of cells arranged end-to-end increased the extracellular electron transfer (EET) ability to electrodes by organizing filaments into bundled structures, with the aid of microbially reduced iron oxide minerals on the cell surface of strain 110S. Based on these findings, together with the attempt to detect surface-localized cytochromes in the genome sequence and the demonstration of redox-dependent staining and immunostaining of the cell surface, we propose a model of bidirectional electron transport by A. maritima strain 110S, in which surface-localized multiheme cytochromes and surface-associated iron minerals serve as a conduit of bidirectional EET in multicellular filaments.
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Affiliation(s)
- Satoshi Kawaichi
- Biofunctional Catalyst Research Team, Center for Sustainable Resource Science, RIKEN, Saitama, Japan
| | - Tetsuya Yamada
- Biofunctional Catalyst Research Team, Center for Sustainable Resource Science, RIKEN, Saitama, Japan.,Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Akio Umezawa
- Biofunctional Catalyst Research Team, Center for Sustainable Resource Science, RIKEN, Saitama, Japan
| | - Shawn E McGlynn
- Biofunctional Catalyst Research Team, Center for Sustainable Resource Science, RIKEN, Saitama, Japan.,Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan
| | - Takehiro Suzuki
- Biomolecular Characterization Unit, Center for Sustainable Resource Science, RIKEN, Wako, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, Center for Sustainable Resource Science, RIKEN, Wako, Japan
| | - Takashi Yoshida
- Laboratory of Marine Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Yoshihiko Sako
- Laboratory of Marine Microbiology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Nobuhiro Matsushita
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | | | - Ryuhei Nakamura
- Biofunctional Catalyst Research Team, Center for Sustainable Resource Science, RIKEN, Saitama, Japan.,Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan
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11
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Yin T, Li H, Su L, Liu S, Yuan C, Fu D. The catalytic effect of TiO 2 nanosheets on extracellular electron transfer of Shewanella loihica PV-4. Phys Chem Chem Phys 2018; 18:29871-29878. [PMID: 27759123 DOI: 10.1039/c6cp04509j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Electron transfer kinetics of Shewanella loihica PV-4 at the up-growing TiO2 nanosheet (TiO2-NS) modified carbon paper (CP) electrode was investigated. The effect of TiO2-NSs, which speeds up the interfacial electron transfer of outer membrane c-type cytochromes (OMCs), was revealed for the first time. TiO2-NSs with a polar surface modified hydrophobic CP into super-hydrophilic TiO2-NS/CP. The favorable interaction between PV-4 and TiO2-NSs not only enhanced microbial adhesion, but also altered the redox nature of OMCs. The mid-point potential of OMCs at TiO2-NS/CP was shifted to a more negative potential, indicating a higher thermodynamic driving force for the protein to release electrons. Moreover, electron transfer from OMCs to TiO2-NSs was also benefited from the positive shift of flat-band potential Vfb owing to reduced pH at the electrode/microorganism interface, as well as good electrical conductivity of TiO2-NSs. As a result, the electron transfer rate constant ket of OMCs at the TiO2-NS/CP anode was about three times faster than that at the CP anode. The accelerated electron transfer kinetics as well as 15% increase of biomass together accounted for a 97% increase of the maximum output power density in the MFC. The result expanded our knowledge about the role of a designed TiO2 nanostructure in microbial electron transfer that can be applied in other bio-electrochemical systems.
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Affiliation(s)
- Tao Yin
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Hui Li
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Lin Su
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Shuo Liu
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Chunwei Yuan
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Degang Fu
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 210096, People's Republic of China. and Suzhou Key Laboratory of Environment and Biosafety, Suzhou, 215123, People's Republic of China and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210096, People's Republic of China
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12
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Jiang Q, Xing D, Zhang L, Sun R, Zhang J, Zhong Y, Feng Y, Ren N. Interaction of bacteria and archaea in a microbial fuel cell with ITO anode. RSC Adv 2018; 8:28487-28495. [PMID: 35542481 PMCID: PMC9084303 DOI: 10.1039/c8ra01207e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/21/2018] [Indexed: 11/21/2022] Open
Abstract
A microbial fuel cell with an indium tin oxide (ITO) coated glass anode was used to study the mechanism of electricity generation and electron transfer of electrochemically active microbes (EAMs). A simple method of ITO anode pretreatment (pickling) was developed to improve the performance of the microbial fuel cell. After proper treatment, ITO-glass anodes maintained their conductivity with a slight increase in resistance. Using this pickling pretreatment, the ITO-glass microbial fuel cell with an anode area of only 8.3 cm2, was successfully initiated and obtained a stable voltage and power output of 418.8 mW m−2. The electrode material with pretreatment showed optimal performance for the in situ study of EAMs. DNA was extracted from various parts of the reactor and the microbial communities were analyzed. The results indicated that the large proportion of methane-related microbes on the cathode of the MFC was one of the reasons for its high COD removal and low columbic efficiency. ITO glass is suitable as an anode material for the in situ study of EAMs, and shows potential for practical application. A microbial fuel cell with an indium tin oxide coated glass anode was used to study the mechanism of electricity generation and electron transfer of electrochemically active microbes.![]()
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Affiliation(s)
- Qingqing Jiang
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
| | - Defeng Xing
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
| | - Lu Zhang
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
| | - Rui Sun
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
| | - Jian Zhang
- Shenzhen Greenster Environmental Technology Co., Ltd
- Shenzhen 518055
- China
| | - Yingjuan Zhong
- Shenzhen Greenster Environmental Technology Co., Ltd
- Shenzhen 518055
- China
| | - Yujie Feng
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
| | - Nanqi Ren
- State Key Lab of Urban Water Resource and Environment (SKLUWRE)
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- 2nd Campus of HIT Box 2614
- Harbin
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13
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Yin T, Su L, Li H, Lin X, Dong L, Du H, Fu D. Nitrogen doping of TiO2 nanosheets greatly enhances bioelectricity generation of S. loihica PV-4. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Okamoto A, Tokunou Y, Saito J. Cation-limited kinetic model for microbial extracellular electron transport via an outer membrane cytochrome C complex. Biophys Physicobiol 2016; 13:71-76. [PMID: 27924259 PMCID: PMC5042175 DOI: 10.2142/biophysico.13.0_71] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 04/23/2016] [Indexed: 12/01/2022] Open
Abstract
Outer-membrane c-type cytochrome (OM c-Cyt) complexes in several genera of iron-reducing bacteria, such as Shewanella and Geobacter, are capable of transporting electrons from the cell interior to extracellular solids as a terminal step of anaerobic respiration. The kinetics of this electron transport has implications for controlling the rate of microbial electron transport during bioenergy or biochemical production, iron corrosion, and natural mineral cycling. Herein, we review the findings from in-vivo and in-vitro studies examining electron transport kinetics through single OM c-Cyt complexes in Shewanella oneidensis MR-1. In-vitro electron flux via a purified OM c-Cyt complex, comprised of MtrA, B, and C proteins from S. oneidensis MR-1, embedded in a proteoliposome system is reported to be 10- to 100-fold faster compared with in-vivo estimates based on measurements of electron flux per cell and OM c-Cyts density. As the proteoliposome system is estimated to have 10-fold higher cation flux via potassium channels than electrons, we speculate that the slower rate of electron-coupled cation transport across the OM is responsible for the significantly lower electron transport rate that is observed in-vivo. As most studies to date have primarily focused on the energetics or kinetics of interheme electron hopping in OM c-Cyts in this microbial electron transport mechanism, the proposed model involving cation transport provides new insight into the rate detemining step of EET, as well as the role of self-secreted flavin molecules bound to OM c-Cyt and proton management for energy conservation and production in S. oneidensis MR-1.
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Affiliation(s)
- Akihiro Okamoto
- Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan; Department of Applied Chemistry, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoshihide Tokunou
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Junki Saito
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
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Storck T, Virdis B, Batstone DJ. Modelling extracellular limitations for mediated versus direct interspecies electron transfer. THE ISME JOURNAL 2016; 10:621-31. [PMID: 26545286 PMCID: PMC4817672 DOI: 10.1038/ismej.2015.139] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 06/15/2015] [Accepted: 07/01/2015] [Indexed: 12/21/2022]
Abstract
Interspecies electron transfer (IET) is important for many anaerobic processes, but is critically dependent on mode of transfer. In particular, direct IET (DIET) has been recently proposed as a metabolically advantageous mode compared with mediated IET (MIET) via hydrogen or formate. We analyse relative feasibility of these IET modes by modelling external limitations using a reaction-diffusion-electrochemical approach in a three-dimensional domain. For otherwise identical conditions, external electron transfer rates per cell pair (cp) are considerably higher for formate-MIET (317 × 10(3) e(-) cp(-1) s(-1)) compared with DIET (44.9 × 10(3) e(-) cp(-1) s(-1)) or hydrogen-MIET (5.24 × 10(3) e(-) cp(-1) s(-1)). MIET is limited by the mediator concentration gradient at which reactions are still thermodynamically feasible, whereas DIET is limited through redox cofactor (for example, cytochromes) activation losses. Model outcomes are sensitive to key parameters for external electron transfer including cofactor electron transfer rate constant and redox cofactor area, concentration or count per cell, but formate-MIET is generally more favourable for reasonable parameter ranges. Extending the analysis to multiple cells shows that the size of the network does not strongly influence relative or absolute favourability of IET modes. Similar electron transfer rates for formate-MIET and DIET can be achieved in our case with a slight (0.7 kJ mol(-1)) thermodynamic advantage for DIET. This indicates that close to thermodynamic feasibility, external limitations can be compensated for by improved metabolic efficiency when using direct electron transfer.
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Affiliation(s)
- Tomas Storck
- Advanced Water Management Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Bernardino Virdis
- Advanced Water Management Centre, The University of Queensland, Brisbane, Queensland, Australia
- Centre for Microbial Electrochemical Systems, The University of Queensland, Brisbane, Queensland, Australia
| | - Damien J Batstone
- Advanced Water Management Centre, The University of Queensland, Brisbane, Queensland, Australia
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Zhao C, Ding C, Lv M, Wang Y, Jiang L, Liu H. Hydrophilicity boosted extracellular electron transfer in Shewanella loihica PV-4. RSC Adv 2016. [DOI: 10.1039/c5ra24369f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A superhydrophilic electrode enables the drastically boosted bacterial EET activity ofShewanella loihicaPV-4. It is proposed that a hydrophilic electrode favors the reduced state of OMCs, and consequently both the EET activity and cell proliferation are highly facilitated.
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Affiliation(s)
- Chen Zhao
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Chunmei Ding
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Meiling Lv
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Yuan Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Huan Liu
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
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Yuan Y, Li L, Zhou S. Axial Ligation of Heme in c-Type Cytochromes of LivingShewanella oneidensis: A New Insight into Enhanced Extracellular Electron Transfer. ChemElectroChem 2015. [DOI: 10.1002/celc.201500234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Yuan
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control; Guangdong Institute of Eco-Environmental and Soil Sciences; Guangzhou 510650 China
| | - Laicai Li
- College of Chemistry and Material Science; Sichuan Normal University; Chengdu 610066 China
| | - Shungui Zhou
- Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control; Guangdong Institute of Eco-Environmental and Soil Sciences; Guangzhou 510650 China
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Ding CM, Lv ML, Zhu Y, Jiang L, Liu H. Wettability-Regulated Extracellular Electron Transfer from the Living Organism ofShewanella loihicaPV-4. Angew Chem Int Ed Engl 2014; 54:1446-51. [DOI: 10.1002/anie.201409163] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 10/27/2014] [Indexed: 12/11/2022]
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Ding CM, Lv ML, Zhu Y, Jiang L, Liu H. Wettability-Regulated Extracellular Electron Transfer from the Living Organism ofShewanella loihicaPV-4. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Kalathil S, Hashimoto K, Okamoto A. Effect of Ionic Strength on the Rate of Extracellular Electron Transport inShewanella oneidensisMR-1 through Bound-Flavin Semiquinones. ChemElectroChem 2014. [DOI: 10.1002/celc.201402195] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Okamoto A, Nakamura R, Nealson KH, Hashimoto K. Bound Flavin Model Suggests Similar Electron-Transfer Mechanisms inShewanellaandGeobacter. ChemElectroChem 2014. [DOI: 10.1002/celc.201402151] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cell-secreted flavins bound to membrane cytochromes dictate electron transfer reactions to surfaces with diverse charge and pH. Sci Rep 2014; 4:5628. [PMID: 25012073 PMCID: PMC4092373 DOI: 10.1038/srep05628] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 06/18/2014] [Indexed: 11/08/2022] Open
Abstract
The variety of solid surfaces to and from which microbes can deliver electrons by extracellular electron transport (EET) processes via outer-membrane c-type cytochromes (OM c-Cyts) expands the importance of microbial respiration in natural environments and industrial applications. Here, we demonstrate that the bifurcated EET pathway of OM c-Cyts sustains the diversity of the EET surface in Shewanella oneidensis MR-1 via specific binding with cell-secreted flavin mononucleotide (FMN) and riboflavin (RF). Microbial current production and whole-cell differential pulse voltammetry revealed that RF and FMN enhance EET as bound cofactors in a similar manner. Conversely, FMN and RF were clearly differentiated in the EET enhancement by gene-deletion of OM c-Cyts and the dependency of the electrode potential and pH. These results indicate that RF and FMN have specific binding sites in OM c-Cyts and highlight the potential roles of these flavin-cytochrome complexes in controlling the rate of electron transfer to surfaces with diverse potential and pH.
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Wu W, Yang F, Liu X, Bai L. Influence of substrate on electricity generation of Shewanella loihica PV-4 in microbial fuel cells. Microb Cell Fact 2014; 13:69. [PMID: 24885728 PMCID: PMC4032171 DOI: 10.1186/1475-2859-13-69] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Accepted: 05/07/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The substrate, serving as carbon and energy source, is one of the major factors affecting the performance of microbial fuel cells (MFCs). We utilized BIOLOG system to rapidly screen substrates for electricigens, and further evaluated influence of these substrates on electricity generation of Shewanella loihica PV-4 in MFCs. RESULTS Three of most favorable substrates (lactate acid, formic acid and cyclodextrin) with OD590/750 of 0.952, 0.880 and 0.849 as well as three of most unfavorable substrates (galactose, arabinose and glucose) with OD590/750 of 0.248, 0.137 and 0.119 were selected by BIOLOG system under aerobic conditions. The chronoamperometry results showed that MFCs fed with these substrates exhibited different current behaviors. Cyclic voltammograms results showed that arabinose, galactose and glucose promoted electron transfer from outer membrane c-Cyts of cells to the electrode surface. Lactic acid, formic acid and cyclodextrin produced lower quantity of electric charge of 10.13 C, 9.83 C and 10.10 C, the corresponding OD600 value was 0.180, 0.286 and 0.152 in BES; while galactose, arabinose and glucose generated higher quantity of electric charge of 12.34 C, 13.42 C and 17.45 C, and increased OD600 values were 0.338, 0.558 and 0.409 in BES. SEMs results showed that plenty of plump and stretched cells as well as appendages were observed when lactic acid, formic acid, and cyclodextrin were utilized as substrates, while sparse cells in short shape were obtained when galactose, arabinose and glucose were used as substrates. CONCLUSIONS These results suggest that substrate not only has important role in electrochemical performances of MFCs but also in biological properties of electricigens. Lactic acid, formic acid, and cyclodextrin beneficial for cell growth under aerobic conditions are unfavourable for planktonic cell growth and current generation under anaerobic conditions, while consumptions of galactose, arabinose and glucose adverse to cell growth under aerobic conditions are favourable for planktonic cell growth and current generation under anaerobic conditions due to the increase of cell numbers with more outer membrane c-Cyts transferring electrons between the electrode surface and cells.
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Affiliation(s)
- Wenguo Wu
- College of Chemical Engineering, Huaqiao University, 361021 Xiamen, P, R, China.
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Carmona-Martínez AA, Harnisch F, Kuhlicke U, Neu TR, Schröder U. Electron transfer and biofilm formation of Shewanella putrefaciens as function of anode potential. Bioelectrochemistry 2013; 93:23-9. [DOI: 10.1016/j.bioelechem.2012.05.002] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 04/23/2012] [Accepted: 05/03/2012] [Indexed: 12/19/2022]
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Rate enhancement of bacterial extracellular electron transport involves bound flavin semiquinones. Proc Natl Acad Sci U S A 2013; 110:7856-61. [PMID: 23576738 DOI: 10.1073/pnas.1220823110] [Citation(s) in RCA: 295] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Extracellular redox-active compounds, flavins and other quinones, have been hypothesized to play a major role in the delivery of electrons from cellular metabolic systems to extracellular insoluble substrates by a diffusion-based shuttling two-electron-transfer mechanism. Here we show that flavin molecules secreted by Shewanella oneidensis MR-1 enhance the ability of its outer-membrane c-type cytochromes (OM c-Cyts) to transport electrons as redox cofactors, but not free-form flavins. Whole-cell differential pulse voltammetry revealed that the redox potential of flavin was reversibly shifted more than 100 mV in a positive direction, in good agreement with increasing microbial current generation. Importantly, this flavin/OM c-Cyts interaction was found to facilitate a one-electron redox reaction via a semiquinone, resulting in a 10(3)- to 10(5)-fold faster reaction rate than that of free flavin. These results are not consistent with previously proposed redox-shuttling mechanisms but suggest that the flavin/OM c-Cyts interaction regulates the extent of extracellular electron transport coupled with intracellular metabolic activity.
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Patil SA, Hägerhäll C, Gorton L. Electron transfer mechanisms between microorganisms and electrodes in bioelectrochemical systems. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s12566-012-0033-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Understanding the mechanism of ET (electron transfer) through electroactive microbial biofilms is a challenge in the field of fundamental and applied life sciences. To date, electrochemical techniques such as CV (cyclic voltammetry) have been applied successfully to study the ET process in intact microbial biofilms on electrodes, providing important insight into their redox properties. However, CV as such does not provide any structural information about the species involved in the redox process. This shortcoming may limit the understanding of the ET process in microbial biofilms. To overcome this restriction, spectroelectrochemical techniques have been designed consisting of a spectroscopic technique performed in combination with electrochemical methods on the same electrode sample. These analytical approaches allow in vivo measurements of microbial biofilms under physiologically relevant conditions and controlled applied potential. The present review describes these spectroelectrochemical methodologies and critically addresses their impact on the understanding of the ET through biofilms.
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Liu H, Matsuda S, Hashimoto K, Nakanishi S. Flavins secreted by bacterial cells of Shewanella catalyze cathodic oxygen reduction. CHEMSUSCHEM 2012; 5:1054-1058. [PMID: 22489008 DOI: 10.1002/cssc.201100824] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Indexed: 05/31/2023]
Abstract
On Her Majesty's Secrete Service: Oxygen reduction is an important process for microbial fuel cells (MFCs) and microbiologically-influenced corrosion (MIC). We demonstrate that flavins secreted by anode-respiring Shewanella cells can catalyze cathodic oxygen reduction via adsorption on the cathode. The findings will provide new insight for developing methods to improve MFC performance and to prevent MIC.
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Affiliation(s)
- Huan Liu
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, BeiHang University, Beijing 100191, PR China
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30
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Okamoto A, Hashimoto K, Nakamura R. Long-range electron conduction of Shewanella biofilms mediated by outer membrane C-type cytochromes. Bioelectrochemistry 2011; 85:61-5. [PMID: 22222436 DOI: 10.1016/j.bioelechem.2011.12.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 11/14/2011] [Accepted: 12/01/2011] [Indexed: 01/11/2023]
Abstract
We investigated the role of c-type cytochromes (c-Cyts) in electron conduction across biofilms of Shewanella oneidensis MR-1 and the relevance of the electron conductivity for biological current generation. Following the formation of monolayer and multilayer biofilms on indium-tin oxide electrodes, we quantified the c-Cyts that were electrically wired with the electrode surface using whole-cell voltammetry. A multilayer biofilm with a thickness of 16μm exhibited a redox peak with an 8-fold larger coulombic area than that of a monolayer biofilm (about 0.5-μm thickness), indicating an abundance of c-Cyts that are able to perform redox-cycling reactions with the distant electrode surface. To determine if this electron conduit of c-Cyts participated in biological current generation, we conducted slow-scan voltammetry for multilayer biofilms. A large anodic current of c-Cyts caused by microbial lactate oxidization was observed during the slow-potential scans, demonstrating the transport of respiratory electrons via the sequential redox cycling of c-Cyts. Experiments with deletion mutants deficient in outer-membrane (OM) c-Cyts (ΔmtrC/ΔomcA, ΔpilD), and the biosynthetic protein of capsular polysaccharide (ΔSO3177) suggested that cell-surface-bound c-Cyts, but those located on pili or extracellular polymeric substrates, play a predominant role in the long-range electron conduction in the biofilm of S. oneidensis MR-1.
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Affiliation(s)
- Akihiro Okamoto
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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31
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Matsuda S, Liu H, Kato S, Hashimoto K, Nakanishi S. Negative faradaic resistance in extracellular electron transfer by anode-respiring Geobacter sulfurreducens cells. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:10163-10169. [PMID: 22047596 DOI: 10.1021/es200834b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Geobacter sulfurreducens is a gram-negative δ-proteobacterium that is capable of transferring respiratory electrons to solid-state extracellular acceptors, including anodes, via abundant c-type cytochromes expressed in the outer membrane. As extracellular electron transfer (EET) to solid-state acceptors can proceed without the addition of exogenous mediators, this microbe has attracted significant attention with respect to energy conversion between electrical and chemical energy. Here, we revealed that clear redox peaks were present in the whole-cell cyclic voltammogram of G. sulfurreducens at around -0.15 V vs Ag|AgCl when tin-doped In(2)O(3) (ITO) glass was used as an anode. Interestingly, the EET current decreased in the potential region more positive than the midpoint potential (E(m)) of the redox peak. Thus, EET of anode-respiring G. sulfurreducens cells exhibited a negative Faradaic resistance (NFR) characteristic at the E(m) of the redox peak, in contrast to general electrochemical systems where the Faradaic current typically increases with increasing overpotential.
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Affiliation(s)
- Shoichi Matsuda
- Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8156, Japan
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Shibanuma T, Nakamura R, Hirakawa Y, Hashimoto K, Ishii K. Observation of In Vivo Cytochrome-Based Electron-Transport Dynamics Using Time-Resolved Evanescent Wave Electroabsorption Spectroscopy. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101810] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Shibanuma T, Nakamura R, Hirakawa Y, Hashimoto K, Ishii K. Observation of in vivo cytochrome-based electron-transport dynamics using time-resolved evanescent wave electroabsorption spectroscopy. Angew Chem Int Ed Engl 2011; 50:9137-40. [PMID: 21812075 DOI: 10.1002/anie.201101810] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/02/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Toshihiko Shibanuma
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Japan
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Wu W, Bai L, Liu X, Tang Z, Gu Z. Nanograss array boron-doped diamond electrode for enhanced electron transfer from Shewanella loihica PV-4. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.05.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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35
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Okamoto A, Nakamura R, Hashimoto K. In-vivo identification of direct electron transfer from Shewanella oneidensis MR-1 to electrodes via outer-membrane OmcA–MtrCAB protein complexes. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.076] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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36
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Millo D, Harnisch F, Patil SA, Ly HK, Schröder U, Hildebrandt P. Spektroelektrochemische In-situ-Untersuchung von elektrokatalytischen mikrobiellen Biofilmen mit oberflächenverstärkter Resonanz-Raman-Spektroskopie. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Millo D, Harnisch F, Patil SA, Ly HK, Schröder U, Hildebrandt P. In situ spectroelectrochemical investigation of electrocatalytic microbial biofilms by surface-enhanced resonance Raman spectroscopy. Angew Chem Int Ed Engl 2011; 50:2625-7. [PMID: 21370352 DOI: 10.1002/anie.201006046] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 11/29/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Diego Millo
- Institut für Chemie, Sekr. PC14, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany.
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Mori S, Ishii K, Hirakawa Y, Nakamura R, Hashimoto K. In Vivo Participation of Artificial Porphyrins in Electron-Transport Chains: Electrochemical and Spectroscopic Analyses of Microbial Metabolism. Inorg Chem 2011; 50:2037-9. [DOI: 10.1021/ic100342k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shigeki Mori
- HASHIMOTO Light Energy Conversion Project, ERATO/JST, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Kazuyuki Ishii
- HASHIMOTO Light Energy Conversion Project, ERATO/JST, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Yuichiro Hirakawa
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Ryuhei Nakamura
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuhito Hashimoto
- HASHIMOTO Light Energy Conversion Project, ERATO/JST, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Liu H, Matsuda S, Kawai T, Hashimoto K, Nakanishi S. Feedback stabilization involving redox states of c-type cytochromes in living bacteria. Chem Commun (Camb) 2011; 47:3870-2. [DOI: 10.1039/c0cc05028h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Nakamura R, Okamoto A, Tajima N, Newton GJ, Kai F, Takashima T, Hashimoto K. Biological iron-monosulfide production for efficient electricity harvesting from a deep-sea metal-reducing bacterium. Chembiochem 2010; 11:643-5. [PMID: 20146276 DOI: 10.1002/cbic.200900775] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ryuhei Nakamura
- Department of Applied Chemistry, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Liu H, Newton G, Nakamura R, Hashimoto K, Nakanishi S. Electrochemical Characterization of a Single Electricity-Producing Bacterial Cell of Shewanella by Using Optical Tweezers. Angew Chem Int Ed Engl 2010; 49:6596-9. [DOI: 10.1002/anie.201000315] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Liu H, Newton G, Nakamura R, Hashimoto K, Nakanishi S. Electrochemical Characterization of a Single Electricity-Producing Bacterial Cell of Shewanella by Using Optical Tweezers. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000315] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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