1
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Aoyama N, Kanematsu H, Barry DM, Miura H, Ogawa A, Kogo T, Kawai R, Hagio T, Hirai N, Kato T, Yoshitake M, Ichino R. AC Electromagnetic Field Controls the Biofilms on the Glass Surface by Escherichia coli & Staphylococcus epidermidis Inhibition Effect. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7051. [PMID: 37959648 PMCID: PMC10649311 DOI: 10.3390/ma16217051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 11/15/2023]
Abstract
Biofilms, mainly comprised of bacteria, form on materials' surfaces due to bacterial activity. They are generally composed of water, extracellular polymeric substances (polysaccharides, proteins, nucleic acids, and lipids), and bacteria. Some bacteria that form biofilms cause periodontal disease, corrosion of the metal materials that make up drains, and slippage. Inside of a biofilm is an environment conducive to the growth and propagation of bacteria. Problems with biofilms include the inability of disinfectants and antibiotics to act on them. Therefore, we have investigated the potential application of alternating electromagnetic fields for biofilm control. We obtained exciting results using various materials' specimens and frequency conditions. Through these studies, we gradually understood that the combination of the type of bacteria, the kind of material, and the application of an electromagnetic field with various low frequencies (4 kHz-12 kHz) changes the circumstances of the onset of the biofilm suppression effect. In this study, relatively high frequencies (20 and 30 kHz) were applied to biofilms caused by Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis), and quantitative evaluation was performed using staining methods. The sample surfaces were analyzed by Raman spectroscopy using a Laser Raman spectrometer to confirm the presence of biofilms on the surface.
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Affiliation(s)
- Natsu Aoyama
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Hideyuki Kanematsu
- Research Collaboration Promotion Center, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan
| | - Dana M. Barry
- Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, USA;
| | - Hidekazu Miura
- Faculty of Medical Engineering, Suzuka University of Medical Science, Suzuka 510-0293, Japan;
| | - Akiko Ogawa
- Department of Chemistry and Biochemistry, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (A.O.); (N.H.)
| | - Takeshi Kogo
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Risa Kawai
- Department of Materials Science and Engineering, National Institute of Technology (KOSEN), Suzuka College, (Currently Asahi Kasei Co.), Suzuka 510-0294, Japan; (N.A.); (T.K.); (R.K.)
| | - Takeshi Hagio
- Institutes of Innovation for Future Society, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan;
| | - Nobumitsu Hirai
- Department of Chemistry and Biochemistry, National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (A.O.); (N.H.)
| | - Takehito Kato
- National Institute of Technology (KOSEN), Oyama College, Oyama 323-0806, Japan;
| | - Michiko Yoshitake
- National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan;
| | - Ryoichi Ichino
- Graduate School of Engineering Chemical Systems Engineering 2, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan;
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2
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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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3
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Zhang B, Shi S, Tang R, Qiao C, Yang M, You Z, Shao S, Wu D, Yu H, Zhang J, Cao Y, Li F, Song H. Recent advances in enrichment, isolation, and bio-electrochemical activity evaluation of exoelectrogenic microorganisms. Biotechnol Adv 2023; 66:108175. [PMID: 37187358 DOI: 10.1016/j.biotechadv.2023.108175] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/10/2023] [Accepted: 05/10/2023] [Indexed: 05/17/2023]
Abstract
Exoelectrogenic microorganisms (EEMs) catalyzed the conversion of chemical energy to electrical energy via extracellular electron transfer (EET) mechanisms, which underlay diverse bio-electrochemical systems (BES) applications in clean energy development, environment and health monitoring, wearable/implantable devices powering, and sustainable chemicals production, thereby attracting increasing attentions from academic and industrial communities in the recent decades. However, knowledge of EEMs is still in its infancy as only ~100 EEMs of bacteria, archaea, and eukaryotes have been identified, motivating the screening and capture of new EEMs. This review presents a systematic summarization on EEM screening technologies in terms of enrichment, isolation, and bio-electrochemical activity evaluation. We first generalize the distribution characteristics of known EEMs, which provide a basis for EEM screening. Then, we summarize EET mechanisms and the principles underlying various technological approaches to the enrichment, isolation, and bio-electrochemical activity of EEMs, in which a comprehensive analysis of the applicability, accuracy, and efficiency of each technology is reviewed. Finally, we provide a future perspective on EEM screening and bio-electrochemical activity evaluation by focusing on (i) novel EET mechanisms for developing the next-generation EEM screening technologies, and (ii) integration of meta-omics approaches and bioinformatics analyses to explore nonculturable EEMs. This review promotes the development of advanced technologies to capture new EEMs.
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Affiliation(s)
- Baocai Zhang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Sicheng Shi
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Rui Tang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Chunxiao Qiao
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Meiyi Yang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zixuan You
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Shulin Shao
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Deguang Wu
- Department of Brewing Engineering, Moutai Institute, Luban Ave, Renhuai 564507, Guizhou, PR China
| | - Huan Yu
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Junqi Zhang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yingxiu Cao
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Feng Li
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Hao Song
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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4
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Liu YN, Lv ZT, Lv WL, Liu DF, Liu XW. Label-Free Optical Imaging of the Electron Transfer in Single Live Microbial Cells. NANO LETTERS 2023; 23:558-566. [PMID: 36594792 DOI: 10.1021/acs.nanolett.2c04018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Measurement of electron transfer at the single-particle or -cell level is crucial to the in situ study of basic chemical and biological processes. However, it remains challenging to directly probe the microbial extracellular electron transfer process due to the weakness of signals and the lack of techniques. Here, we present a label-free and noninvasive imaging method that is able to measure the electron transfer in microbial cells. We measured the extracellular electron transfer processes by imaging the redox reaction of c-type outer membrane cytochromes in microbial cells using a plasmonic imaging technique, and obtained the electrochemical activity parameters (formal potential and number of electrons transferred) of multiple individual microbial cells, allowing for unveiling ample heterogeneities in electron transfer at the single-cell level. We anticipate that this method will contribute to the study of electron transfer in various biological and chemical processes.
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Affiliation(s)
- Yi-Nan Liu
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China
| | - Zhen-Ting Lv
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China
| | - Wen-Li Lv
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China
| | - Dong-Feng Liu
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China
| | - Xian-Wei Liu
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei230026, China
- Department of Applied Chemistry, University of Science and Technology of China, Hefei230026, China
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5
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Islam J, Obulisamy PK, Upadhyayula VKK, Dalton AB, Ajayan PM, Rahman MM, Tripathi M, Sani RK, Gadhamshetty V. Graphene as Thinnest Coating on Copper Electrodes in Microbial Methanol Fuel Cells. ACS NANO 2023; 17:137-145. [PMID: 36535017 DOI: 10.1021/acsnano.2c05512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Dehydrogenation of methanol (CH3OH) into direct current (DC) in fuel cells can be a potential energy conversion technology. However, their development is currently hampered by the high cost of electrocatalysts based on platinum and palladium, slow kinetics, the formation of carbon monoxide intermediates, and the requirement for high temperatures. Here, we report the use of graphene layers (GL) for generating DC electricity from microbially driven methanol dehydrogenation on underlying copper (Cu) surfaces. Genetically tractable Rhodobacter sphaeroides 2.4.1 (Rsp), a nonarchetypical methylotroph, was used for dehydrogenating methanol at the GL-Cu surfaces. We use electrochemical methods, microscopy, and spectroscopy methods to assess the effects of GL on methanol dehydrogenation by Rsp cells. The GL-Cu offers a 5-fold higher power density and 4-fold higher current density compared to bare Cu. The GL lowers charge transfer resistance to methanol dehydrogenation by 4 orders of magnitude by mitigating issues related to pitting corrosion of underlying Cu surfaces. The presented approach for catalyst-free methanol dehydrogenation on copper electrodes can improve the overall sustainability of fuel cell technologies.
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Affiliation(s)
- Jamil Islam
- Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
- BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | - Parthiba Karthikeyan Obulisamy
- Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
- BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
| | | | - Alan B Dalton
- Department of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, United Kingdom
| | - Pulickel M Ajayan
- Department of Materials Science and Nanoengineering, Rice University, Houston, Texas 77005, United States
| | - Muhammad M Rahman
- Department of Materials Science and Nanoengineering, Rice University, Houston, Texas 77005, United States
| | - Manoj Tripathi
- Department of Physics and Astronomy, University of Sussex, Brighton BN1 9RH, United Kingdom
| | - Rajesh Kumar Sani
- Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
- BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
- 2Dimensional Materials for Biofilm Engineering Science and Technology (2DBEST) Center, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
| | - Venkataramana Gadhamshetty
- Department Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
- BuGReMeDEE Consortium, South Dakota School of Mines and Technology, 501 E St Joseph St, Rapid City, South Dakota 57701, United States
- 2Dimensional Materials for Biofilm Engineering Science and Technology (2DBEST) Center, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, United States
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6
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Kamimura R, Kanematsu H, Ogawa A, Kogo T, Miura H, Kawai R, Hirai N, Kato T, Yoshitake M, Barry DM. Quantitative Analyses of Biofilm by Using Crystal Violet Staining and Optical Reflection. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6727. [PMID: 36234069 PMCID: PMC9571847 DOI: 10.3390/ma15196727] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/26/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Biofilms have caused many problems, not only in the industrial fields, but also in our daily lives. Therefore, it is important for us to control them by evaluating them properly. There are many instrumental analytical methods available for evaluating formed biofilm qualitatively. These methods include the use of Raman spectroscopy and various microscopes (optical microscopes, confocal laser microscopes, scanning electron microscopes, transmission electron microscopes, atomic force microscopes, etc.). On the other hand, there are some biological methods, such as staining, gene analyses, etc. From the practical viewpoint, staining methods seem to be the best due to various reasons. Therefore, we focused on the staining method that used a crystal violet solution. In the previous study, we devised an evaluation process for biofilms using a color meter to analyze the various staining situations. However, this method was complicated and expensive for practical engineers. For this experiment, we investigated the process of using regular photos that were quantified without any instruments except for digitized cameras. Digitized cameras were used to compare the results. As a result, we confirmed that the absolute values were different for both cases, respectively. However, the tendency of changes was the same. Therefore, we plan to utilize the changes before and after biofilm formation as indicators for the future.
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Affiliation(s)
- Ryuto Kamimura
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Hideyuki Kanematsu
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Akiko Ogawa
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Takeshi Kogo
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Hidekazu Miura
- Faculty of Medical Engineering, Suzuka University of Medical Science, Suzuka 510-0293, Mie, Japan
| | - Risa Kawai
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Nobumitsu Hirai
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Mie, Japan
| | - Takehito Kato
- National Institute of Technology (KOSEN), Oyama College, Oyama 323-0806, Tochigi, Japan
| | - Michiko Yoshitake
- National Institute for Materials Science (NIMS), Tsukuba 305-0044, Ibaraki, Japan
| | - Dana M. Barry
- Department of Electrical & Computer Engineering, Clarkson University, Potsdam, NY 13699, USA
- STEM Laboratory, State University of New York, Canton, NY 13617, USA
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7
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Kudara H, Kanematsu H, Barry DM, Ogawa A, Kogo T, Miura H, Kawai R, Hirai N, Kato T, Yoshitake M. Proposal for Some Affordable Laboratory Biofilm Reactors and Their Critical Evaluations from Practical Viewpoints. MATERIALS 2022; 15:ma15134691. [PMID: 35806818 PMCID: PMC9267959 DOI: 10.3390/ma15134691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/15/2022] [Accepted: 06/16/2022] [Indexed: 11/16/2022]
Abstract
Biofilms are a result of bacterial activities and are found everywhere. They often form on metal surfaces and on the surfaces of polymeric compounds. Biofilms are sticky and mostly consist of water. They have a strong resistance to antimicrobial agents and can cause serious problems for modern medicine and industry. Biofilms are composed of extracellular polymeric substances (EPS) such as polysaccharides produced from bacterial cells and are dominated by water at the initial stage. In a series of experiments, using Escherichia coli, we developed three types of laboratory biofilm reactors (LBR) to simulate biofilm formation. For the first trial, we used a rotary type of biofilm reactor for stirring. For the next trial, we tried another rotary type of reactor where the circular plate holding specimens was rotated. Finally, a circular laboratory biofilm reactor was used. Biofilms were evaluated by using a crystal violet staining method and by using Raman spectroscopy. Additionally, they were compared to each other from the practical (industrial) viewpoints. The third type was the best to form biofilms in a short period. However, the first and second were better from the viewpoint of “ease of use”. All of these have their own advantages and disadvantages, respectively. Therefore, they should be properly selected and used for specific and appropriate purposes in the future.
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Affiliation(s)
- Hikonaru Kudara
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
| | - Hideyuki Kanematsu
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
- Correspondence: ; Tel.: +81-59-368-1848
| | - Dana M. Barry
- Department of Electrical & Computer Engineering, Clarkson University, Potsdam, NY 13699, USA;
- STEM Laboratory, State University of New York, Canton, NY 13617, USA
| | - Akiko Ogawa
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
| | - Takeshi Kogo
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
| | - Hidekazu Miura
- Faculty of Medical Engineering, Suzuka University of Medical Science, Suzuka 510-0293, Japan;
| | - Risa Kawai
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
| | - Nobumitsu Hirai
- National Institute of Technology (KOSEN), Suzuka College, Suzuka 510-0294, Japan; (H.K.); (A.O.); (T.K.); (R.K.); (N.H.)
| | - Takehito Kato
- National Institute of Technology (KOSEN), Oyama College, Oyama 323-0806, Japan;
| | - Michiko Yoshitake
- National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan;
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8
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Impedance Characteristics of Monolayer and Bilayer Graphene Films with Biofilm Formation and Growth. SENSORS 2022; 22:s22093548. [PMID: 35591238 PMCID: PMC9101136 DOI: 10.3390/s22093548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/09/2022] [Accepted: 04/11/2022] [Indexed: 11/17/2022]
Abstract
Biofilms are the result of bacterial activity. When the number of bacteria (attached to materials’ surfaces) reaches a certain threshold value, then the bacteria simultaneously excrete organic polymers (EPS: extracellular polymeric substances). These sticky polymers encase and protect the bacteria. They are called biofilms and contain about 80% water. Other components of biofilm include polymeric carbon compounds such as polysaccharides and bacteria. It is well-known that biofilms cause various medical and hygiene problems. Therefore, it is important to have a sensor that can detect biofilms to solve such problems. Graphene is a single-atom-thick sheet in which carbon atoms are connected in a hexagonal shape like a honeycomb. Carbon compounds generally bond easily to graphene. Therefore, it is highly possible that graphene could serve as a sensor to monitor biofilm formation and growth. In our previous study, monolayer graphene was prepared on a glass substrate by the chemical vapor deposition (CVD) method. Its biofilm forming ability was compared with that of graphite. As a result, the CVD graphene film had the higher sensitivity for biofilm formation. However, the monolayer graphene has a mechanical disadvantage when used as a biofilm sensor. Therefore, for this new research project, we prepared bilayer graphene with high mechanical strength by using the CVD process on copper substrates. For these specimens, we measured the capacitance component of the specimens’ impedance. In addition, we have included a discussion about the possibility of applying them as future sensors for monitoring biofilm formation and growth.
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9
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Kuruvinashetti K, Kornienko N. Pushing the methodological envelope in understanding the photo/electrosynthetic materials-microorganism interface. iScience 2021; 24:103049. [PMID: 34553134 PMCID: PMC8441150 DOI: 10.1016/j.isci.2021.103049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Biohybrid photo/electrosynthetic systems synergize microbial metabolic pathways and inorganic materials to generate the fuels and chemicals to power our society. They aim to combine the strengths of product selectivity from biological cells and efficient charge generation and light absorption of inorganic materials. However crucial mechanistic questions still remain. In this review we address significant knowledge gaps that must be closed and recent efforts to do so to push biohybrid systems closer to applicability. In particular, we focus on noteworthy advances that have recently been made in applying state-of-the-art analytical spectroscopic, electrochemical, and microelectronic techniques to help pinpoint key complexities of the microbe-materials interface. We discuss the basic function of these techniques, how they have been translated over to study biohybrid systems, and which key insights and implications have been extracted. Finally, we delve into the key advances necessary for the design of next generation biohybrid energy conversion systems.
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Affiliation(s)
- Kiran Kuruvinashetti
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3 Canada
| | - Nikolay Kornienko
- Department of Chemistry, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, QC H2V 0B3 Canada
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10
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Sundaresan V, Cutri AR, Metro J, Madukoma CS, Shrout JD, Hoffman AJ, Willets KA, Bohn PW. Potential dependent spectroelectrochemistry of electrofluorogenic dyes on indium‐tin oxide. ELECTROCHEMICAL SCIENCE ADVANCES 2021; 2. [DOI: 10.1002/elsa.202100094] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Vignesh Sundaresan
- Department of Chemical and Biomolecular Engineering University of Notre Dame Notre Dame Indiana
| | - Allison R. Cutri
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana
| | - Jarek Metro
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana
| | - Chinedu S. Madukoma
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame Indiana
- Eck Institute for Global Health University of Notre Dame Notre Dame Indiana
| | - Joshua D. Shrout
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame Indiana
- Eck Institute for Global Health University of Notre Dame Notre Dame Indiana
- Department of Biological Sciences University of Notre Dame Notre Dame Indiana
| | - Anthony J. Hoffman
- Department of Electrical Engineering University of Notre Dame Notre Dame Indiana
| | | | - Paul W. Bohn
- Department of Chemical and Biomolecular Engineering University of Notre Dame Notre Dame Indiana
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana
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11
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Liu X, Zhan J, Liu L, Gan F, Ye J, Nealson KH, Rensing C, Zhou S. In Situ Spectroelectrochemical Characterization Reveals Cytochrome-Mediated Electric Syntrophy in Geobacter Coculture. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:10142-10151. [PMID: 34196176 DOI: 10.1021/acs.est.1c00356] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Direct interspecies electron transfer (DIET) between microbial species prevails in some key microbial consortia. However, the electron transfer mechanism(s) in these consortia is controversial due to lack of efficient characterization methods. Here, we provide an in situ anaerobic spectroelectrochemical coculture cell (in situ ASCC) to induce the formation of DIET coculture biofilm on the interdigitated microelectrode arrays and characterize the electron transfer directly. Two typical Geobacter DIET cocultures, Geobacter metallireducens and wild-type Geobacter sulfurreducens (G.m&G.s) and G. metallireducens and a G. sulfurreducens strain deficient in citrate synthase (G.m&G.s-ΔgltA), were selected. In situ Raman and electrochemical Fourier transform infrared (FTIR) spectroscopy indicated that cytochromes are abundant in the electric syntrophic coculture. Cyclic voltammetry and potential step experiment revealed a diffusion-controlled electron transfer process and the electrochemical gating measurements further demonstrated a cytochrome-mediated electron transfer in the DIET coculture. Furthermore, the G.m&G.s-ΔgltA coculture displayed a higher redox conductivity than the G.m&G.s coculture, consistent with the existence of an intimate and efficient electrical connection between these two species. Our findings provide the first report of a redox-gradient-driven electron transport facilitated by c-type cytochromes in DIET coculture, supporting the model that DIET is mediated by cytochromes and suggest a platform to explore the other DIET consortia.
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Affiliation(s)
- Xing Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ji Zhan
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Lu Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Feiting Gan
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Ye
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Kenneth H Nealson
- Department of Earth Science, University of Southern California, Los Angeles, California 90007, United States
| | - Christopher Rensing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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12
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Ly KH, Weidinger IM. Understanding active sites in molecular (photo)electrocatalysis through complementary vibrational spectroelectrochemistry. Chem Commun (Camb) 2021; 57:2328-2342. [DOI: 10.1039/d0cc07376h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting vibrational spectroelectrochemistry for the investigation of synthetic molecular (photo) electrocatalysts for key energy conversion reactions.
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Affiliation(s)
- Khoa H. Ly
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
| | - Inez M. Weidinger
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
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13
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Yan Y, Nie Y, An L, Tang YQ, Xu Z, Wu XL. Improvement of Surface-Enhanced Raman Scattering Method for Single Bacterial Cell Analysis. Front Bioeng Biotechnol 2020; 8:573777. [PMID: 33042973 PMCID: PMC7527739 DOI: 10.3389/fbioe.2020.573777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/25/2020] [Indexed: 12/26/2022] Open
Abstract
Surface-enhanced Raman scattering (SERS) is a useful tool for label-free analysis of bacteria at the single cell level. However, low reproducibility limits the use of SERS. In this study, for the sake of sensitive and reproducible Raman spectra, we optimized the methods for preparing silver nanoparticles (AgNPs) and depositing AgNPs onto a cell surface. We found that fast dropwise addition of AgNO3 into the reductant produced smaller and more stable AgNPs, with an average diameter of 45 ± 4 nm. Compared with that observed after simply mixing the bacterial cells with AgNPs, the SERS signal was significantly improved after centrifugation. To optimize the SERS enhancement method, the centrifugal force, method for preparing AgNPs, concentration of AgNPs, ionic strength of the solution used to suspend the cells, and density of the cells were chosen as impact factors and optimized through orthogonal experiments. Finally, the improved method could generate sensitive and reproducible SERS spectra from single Escherichia coli cells, and the SERS signals primarily arose from the cell envelope. We further verified that this optimal method was feasible for the detection of low to 25% incorporation of 13C isotopes by the cells and the discrimination of different bacterial species. Our work provides an improved method for generating sensitive and reproducible SERS spectra.
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Affiliation(s)
- Yingchun Yan
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China.,College of Engineering, Peking University, Beijing, China
| | - Yong Nie
- College of Engineering, Peking University, Beijing, China
| | - Liyun An
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China.,College of Engineering, Peking University, Beijing, China
| | - Yue-Qin Tang
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China
| | - Zimu Xu
- College of Engineering, Peking University, Beijing, China
| | - Xiao-Lei Wu
- College of Engineering, Peking University, Beijing, China.,Institute of Ocean Research, Peking University, Beijing, China
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14
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Heidary N, Kornienko N, Kalathil S, Fang X, Ly KH, Greer HF, Reisner E. Disparity of Cytochrome Utilization in Anodic and Cathodic Extracellular Electron Transfer Pathways of Geobacter sulfurreducens Biofilms. J Am Chem Soc 2020; 142:5194-5203. [PMID: 32066233 PMCID: PMC7082794 DOI: 10.1021/jacs.9b13077] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 12/18/2022]
Abstract
Extracellular electron transfer (EET) in microorganisms is prevalent in nature and has been utilized in functional bioelectrochemical systems. EET of Geobacter sulfurreducens has been extensively studied and has been revealed to be facilitated through c-type cytochromes, which mediate charge between the electrode and G. sulfurreducens in anodic mode. However, the EET pathway of cathodic conversion of fumarate to succinate is still under debate. Here, we apply a variety of analytical methods, including electrochemistry, UV-vis absorption and resonance Raman spectroscopy, quartz crystal microbalance with dissipation, and electron microscopy, to understand the involvement of cytochromes and other possible electron-mediating species in the switching between anodic and cathodic reaction modes. By switching the applied bias for a G. sulfurreducens biofilm coupled to investigating the quantity and function of cytochromes, as well as the emergence of Fe-containing particles on the cell membrane, we provide evidence of a diminished role of cytochromes in cathodic EET. This work sheds light on the mechanisms of G. sulfurreducens biofilm growth and suggests the possible existence of a nonheme, iron-involving EET process in cathodic mode.
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Affiliation(s)
- Nina Heidary
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Nikolay Kornienko
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Université de Montréal, Roger-Gaudry Building, Montreal, Quebec H3C 3J7, Canada
| | - Shafeer Kalathil
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Xin Fang
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Khoa H. Ly
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Fakultät
für Chemie und Lebensmittelchemie, Technische Universität Dresden, Dresden 01062, Germany
| | - Heather F. Greer
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Erwin Reisner
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
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15
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Buhrke D, Hildebrandt P. Probing Structure and Reaction Dynamics of Proteins Using Time-Resolved Resonance Raman Spectroscopy. Chem Rev 2019; 120:3577-3630. [PMID: 31814387 DOI: 10.1021/acs.chemrev.9b00429] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The mechanistic understanding of protein functions requires insight into the structural and reaction dynamics. To elucidate these processes, a variety of experimental approaches are employed. Among them, time-resolved (TR) resonance Raman (RR) is a particularly versatile tool to probe processes of proteins harboring cofactors with electronic transitions in the visible range, such as retinal or heme proteins. TR RR spectroscopy offers the advantage of simultaneously providing molecular structure and kinetic information. The various TR RR spectroscopic methods can cover a wide dynamic range down to the femtosecond time regime and have been employed in monitoring photoinduced reaction cascades, ligand binding and dissociation, electron transfer, enzymatic reactions, and protein un- and refolding. In this account, we review the achievements of TR RR spectroscopy of nearly 50 years of research in this field, which also illustrates how the role of TR RR spectroscopy in molecular life science has changed from the beginning until now. We outline the various methodological approaches and developments and point out current limitations and potential perspectives.
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Affiliation(s)
- David Buhrke
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Straße des 17, Juni 135, D-10623 Berlin, Germany
| | - Peter Hildebrandt
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Straße des 17, Juni 135, D-10623 Berlin, Germany
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16
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Schrott GD, Bonanni PS, Busalmen JP. Open circuit potentiometry reports on internal redox states of cells in G. Sulfurreducens biofilms. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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17
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On-Line Raman Spectroscopic Study of Cytochromes' Redox State of Biofilms in Microbial Fuel Cells. Molecules 2019; 24:molecules24030646. [PMID: 30759821 PMCID: PMC6384720 DOI: 10.3390/molecules24030646] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 02/07/2019] [Accepted: 02/09/2019] [Indexed: 11/17/2022] Open
Abstract
Bio-electrochemical systems such as microbial fuel cells and microbial electrosynthesis cells depend on efficient electron transfer between the microorganisms and the electrodes. Understanding the mechanisms and dynamics of the electron transfer is important in order to design more efficient reactors, as well as modifying microorganisms for enhanced electricity production. Geobacter are well known for their ability to form thick biofilms and transfer electrons to the surfaces of electrodes. Currently, there are not many “on-line” systems for monitoring the activity of the biofilm and the electron transfer process without harming the biofilm. Raman microscopy was shown to be capable of providing biochemical information, i.e., the redox state of C-type cytochromes, which is integral to external electron transfer, without harming the biofilm. In the current study, a custom 3D printed flow-through cuvette was used in order to analyze the oxidation state of the C-type cytochromes of suspended cultures of three Geobacter sulfurreducens strains (PCA, KN400 and ΔpilA). It was found that the oxidation state is a good indicator of the metabolic state of the cells. Furthermore, an anaerobic fluidic system enabling in situ Raman measurements was designed and applied successfully to monitor and characterize G. sulfurreducens biofilms during electricity generation, for both a wild strain, PCA, and a mutant, ΔS. The cytochrome redox state, monitored by the Raman peak areas, could be modulated by applying different poise voltages to the electrodes. This also correlated with the modulation of current transferred from the cytochromes to the electrode. The Raman peak area changed in a predictable and reversible manner, indicating that the system could be used for analyzing the oxidation state of the proteins responsible for the electron transfer process and the kinetics thereof in-situ.
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18
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Golden J, Yates MD, Halsted M, Tender L. Application of electrochemical surface plasmon resonance (ESPR) to the study of electroactive microbial biofilms. Phys Chem Chem Phys 2018; 20:25648-25656. [PMID: 30289415 DOI: 10.1039/c8cp03898h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Electrochemical surface plasmon resonance (ESPR) monitors faradaic processes optically by the change in refractive index that occurs with a change in redox state at the electrode surface. Here we apply ESPR to investigate the anode-grown Geobacter sulfurreducens biofilm (GSB), a model system used to study electroactive microbial biofilms (EABFs) which perform electrochemical reactions using electrodes as metabolic electron acceptors or donors. A substantial body of evidence indicates that electron transfer reactions among hemes of c-type cytochromes (c-Cyt) play major roles in the extracellular electron transfer (EET) pathways that connect intracellular metabolic processes of cells in an EABF to the electrode surface. The results reported here reveal that when the potential of the electrode is changed from relatively oxidizing (0.40 V vs. SHE) to reducing (-0.55 V vs. SHE) and then back to oxidizing, 70% of c-Cyt residing closest to the biofilm/electrode (within hundreds of nm from the electrode surface) appear to remain trapped in the reduced state, requiring as long as 12 hours to be re-oxidized. c-Cyt storing electrons cannot contribute to EET, yet turnover current resulting from cellular oxidation of acetate coupled with EET to the electrode surface is unaffected. This suggests that a relatively small fraction of c-Cyt residing closest to the biofilm/electrode interface is involved in EET while the majority store electrons. The results also reveal that biomass density at the biofilm/electrode interface increases rapidly during lag phase, reaching its maximum value at the onset of exponential biofilm growth when turnover current begins to rapidly increase.
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Affiliation(s)
- Joel Golden
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington DC, 20375, USA.
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19
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Kornienko N, Zhang JZ, Sakimoto KK, Yang P, Reisner E. Interfacing nature's catalytic machinery with synthetic materials for semi-artificial photosynthesis. NATURE NANOTECHNOLOGY 2018; 13:890-899. [PMID: 30291349 DOI: 10.1038/s41565-018-0251-7] [Citation(s) in RCA: 213] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/31/2018] [Indexed: 05/23/2023]
Abstract
Semi-artificial photosynthetic systems aim to overcome the limitations of natural and artificial photosynthesis while providing an opportunity to investigate their respective functionality. The progress and studies of these hybrid systems is the focus of this forward-looking perspective. In this Review, we discuss how enzymes have been interfaced with synthetic materials and employed for semi-artificial fuel production. In parallel, we examine how more complex living cellular systems can be recruited for in vivo fuel and chemical production in an approach where inorganic nanostructures are hybridized with photosynthetic and non-photosynthetic microorganisms. Side-by-side comparisons reveal strengths and limitations of enzyme- and microorganism-based hybrid systems, and how lessons extracted from studying enzyme hybrids can be applied to investigations of microorganism-hybrid devices. We conclude by putting semi-artificial photosynthesis in the context of its own ambitions and discuss how it can help address the grand challenges facing artificial systems for the efficient generation of solar fuels and chemicals.
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Affiliation(s)
- Nikolay Kornienko
- Department of Chemistry, University of Cambridge, Cambridge, UK
- Department of Chemistry, University of California, Berkeley, CA, USA
| | - Jenny Z Zhang
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Kelsey K Sakimoto
- Department of Chemistry, University of California, Berkeley, CA, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
- Department of Systems Biology, Harvard Medical School, Boston, MA, USA
| | - Peidong Yang
- Department of Chemistry, University of California, Berkeley, CA, USA.
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
- Kavli Energy NanoSciences Institute, Berkeley, CA, USA.
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA.
| | - Erwin Reisner
- Department of Chemistry, University of Cambridge, Cambridge, UK.
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20
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Wen J, He D, Yu Z, Zhou S. In situ detection of microbial c-type cytochrome based on intrinsic peroxidase-like activity using screen-printed carbon electrode. Biosens Bioelectron 2018; 113:52-57. [DOI: 10.1016/j.bios.2018.04.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 01/03/2023]
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21
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Revealing metabolic storage processes in electrode respiring bacteria by differential electrochemical mass spectrometry. Bioelectrochemistry 2018; 121:160-168. [DOI: 10.1016/j.bioelechem.2018.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 01/25/2023]
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22
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Yates MD, Barr Engel S, Eddie BJ, Lebedev N, Malanoski AP, Tender LM. Redox-gradient driven electron transport in a mixed community anodic biofilm. FEMS Microbiol Ecol 2018; 94:4990946. [DOI: 10.1093/femsec/fiy081] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 05/01/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Matthew D Yates
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC, 20375, USA
| | - Sarah Barr Engel
- Department of Civil and Environmental Engineering, Cornell University, 220 Hollister Hall, Ithaca, NY, 14853, USA
| | - Brian J Eddie
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC, 20375, USA
| | - Nikolai Lebedev
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC, 20375, USA
| | - Anthony P Malanoski
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC, 20375, USA
| | - Leonard M Tender
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC, 20375, USA
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23
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Cui L, Yang K, Li HZ, Zhang H, Su JQ, Paraskevaidi M, Martin FL, Ren B, Zhu YG. Functional Single-Cell Approach to Probing Nitrogen-Fixing Bacteria in Soil Communities by Resonance Raman Spectroscopy with 15N 2 Labeling. Anal Chem 2018; 90:5082-5089. [PMID: 29557648 DOI: 10.1021/acs.analchem.7b05080] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nitrogen (N) fixation is the conversion of inert nitrogen gas (N2) to bioavailable N essential for all forms of life. N2-fixing microorganisms (diazotrophs), which play a key role in global N cycling, remain largely obscure because a large majority are uncultured. Direct probing of active diazotrophs in the environment is still a major challenge. Herein, a novel culture-independent single-cell approach combining resonance Raman (RR) spectroscopy with 15N2 stable isotope probing (SIP) was developed to discern N2-fixing bacteria in a complex soil community. Strong RR signals of cytochrome c (Cyt c, frequently present in diverse N2-fixing bacteria), along with a marked 15N2-induced Cyt c band shift, generated a highly distinguishable biomarker for N2 fixation. 15N2-induced shift was consistent well with 15N abundance in cell determined by isotope ratio mass spectroscopy. By applying this biomarker and Raman imaging, N2-fixing bacteria in both artificial and complex soil communities were discerned and imaged at the single-cell level. The linear band shift of Cyt c versus 15N2 percentage allowed quantification of N2 fixation extent of diverse soil bacteria. This single-cell approach will advance the exploration of hitherto uncultured diazotrophs in diverse ecosystems.
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Affiliation(s)
- Li Cui
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China
| | - Kai Yang
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China.,University of Chinese Academy of Sciences , 19A Yuquan Road , Beijing 100049 , China
| | - Hong-Zhe Li
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China.,University of Chinese Academy of Sciences , 19A Yuquan Road , Beijing 100049 , China
| | - Han Zhang
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China
| | - Jian-Qiang Su
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China
| | - Maria Paraskevaidi
- School of Pharmacy and Biomedical Sciences , University of Central Lancashire , Preston PR1 2HE , U.K
| | - Francis L Martin
- School of Pharmacy and Biomedical Sciences , University of Central Lancashire , Preston PR1 2HE , U.K
| | - Bin Ren
- Department of Chemistry , Xiamen University , Xiamen 361005 , China
| | - Yong-Guan Zhu
- Key Lab of Urban Environment and Health, Institute of Urban Environment , Chinese Academy of Sciences , Xiamen 361021 , China.,State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
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24
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Shevchenko KG, Cherkasov VR, Nikitina IL, Babenyshev AV, Nikitin MP. Smart multifunctional nanoagents for in situ monitoring of small molecules with a switchable affinity towards biomedical targets. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0659-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Abstract
The great diversity of nanomaterials provides ample opportunities for constructing effective agents for biomedical applications ranging from biosensing to drug delivery. Multifunctional nanoagents that combine several features in a single particle are of special interest due to capabilities that substantially exceed those of molecular drugs. An ideal theranostic agent should simultaneously be an advanced biosensor to identify a disease and report the diagnosis and a biomedical actuator to treat the disease. While many approaches were developed to load a nanoparticle with various drugs for actuation of the diseased cells (e.g., to kill them), the nanoparticle-based approaches for the localized biosensing with real-time reporting of the marker concentration severely lag behind. Here, we show a smart in situ nanoparticle-based biosensor/actuator system that dynamically and reversibly changes its structural and optical properties in response to a small molecule marker to allow real-time monitoring of the marker concentration and adjustment of the system ability to bind its biomedical target. Using the synergistic combination of signal readout based on the localized surface plasmon resonance and an original method of fabrication of smart ON/OFF-switchable nanoagents, we demonstrate reversible responsiveness of the system to a model small molecule marker (antibiotic chloramphenicol) in a wide concentration range. The proposed approach can be used for the development of advanced multifunctional nanoagents for theranostic applications.
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25
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Gold-modified indium tin oxide as a transparent window in optoelectronic diagnostics of electrochemically active biofilms. Biosens Bioelectron 2017; 94:74-80. [DOI: 10.1016/j.bios.2017.02.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/28/2017] [Accepted: 02/23/2017] [Indexed: 11/23/2022]
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26
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Schmidt I, Pieper A, Wichmann H, Bunk B, Huber K, Overmann J, Walla PJ, Schröder U. In Situ Autofluorescence Spectroelectrochemistry for the Study of Microbial Extracellular Electron Transfer. ChemElectroChem 2017. [DOI: 10.1002/celc.201700675] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Igor Schmidt
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; 38106 Braunschweig Germany
| | - Alexander Pieper
- Department of Biophysical Chemistry, Institute for Physical and Theoretical Chemistry; Technische Universität Braunschweig; 38106 Braunschweig, Germany
| | - Hilke Wichmann
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; 38106 Braunschweig Germany
| | - Boyke Bunk
- Department Microbial Ecology and Diversity Research; Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; 38124 Braunschweig Germany
| | - Katharina Huber
- Department Microbial Ecology and Diversity Research; Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; 38124 Braunschweig Germany
| | - Jörg Overmann
- Department Microbial Ecology and Diversity Research; Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; 38124 Braunschweig Germany
| | - Peter Jomo Walla
- Department of Biophysical Chemistry, Institute for Physical and Theoretical Chemistry; Technische Universität Braunschweig; 38106 Braunschweig, Germany
| | - Uwe Schröder
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; 38106 Braunschweig Germany
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27
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Robuschi L, Tomba JP, Busalmen JP. Proving Geobacter biofilm connectivity with confocal Raman microscopy. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2016.11.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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28
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Raman microspectroscopy, surface-enhanced Raman scattering microspectroscopy, and stable-isotope Raman microspectroscopy for biofilm characterization. Anal Bioanal Chem 2017; 409:4353-4375. [DOI: 10.1007/s00216-017-0303-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/31/2017] [Accepted: 03/08/2017] [Indexed: 12/27/2022]
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29
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Zhou L, Deng D, Zhang Y, Zhou W, Jiang Y, Liu Y. Isolation of a facultative anaerobic exoelectrogenic strain LZ-1 and probing electron transfer mechanism in situ by linking UV/Vis spectroscopy and electrochemistry. Biosens Bioelectron 2017; 90:264-268. [DOI: 10.1016/j.bios.2016.11.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 11/01/2016] [Accepted: 11/25/2016] [Indexed: 12/12/2022]
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Tejedor-Sanz S, Quejigo JR, Berná A, Esteve-Núñez A. The Planktonic Relationship Between Fluid-Like Electrodes and Bacteria: Wiring in Motion. CHEMSUSCHEM 2017; 10:693-700. [PMID: 27860438 DOI: 10.1002/cssc.201601329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/01/2016] [Indexed: 06/06/2023]
Abstract
We have explored a new concept in bacteria-electrode interaction based on the use of fluid-like electrodes and planktonic living cells. We show for the first time that living in a biofilm is not a strict requirement for Geobacter sulfurreducens to exchange electrons with an electrode. The growth of planktonic electroactive G. sulfurreducens could be supported by a fluid-like anode as soluble electron acceptors and with electron transfer rates similar to those reported for electroactive biofilms. This growth was maintained by uncoupling the charge (catabolism) and discharge (extracellular respiration) processes of the cells. Our results reveal a novel method to culture electroactive bacteria in which every single cell in the medium could be instantaneously wired to a fluid-like electrode. Direct extracellular electron transfer is occurring but with a new paradigm behind the bacteria-electrode interaction.
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Affiliation(s)
- Sara Tejedor-Sanz
- Department of Chemical Engineering, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
- Innovation and Technology Department, FCC Aqualia, S.A., Madrid, Spain
| | - Jose Rodrigo Quejigo
- Department of Chemical Engineering, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Antonio Berná
- IMDEA Water, Parque Tecnológico de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Abraham Esteve-Núñez
- Department of Chemical Engineering, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
- IMDEA Water, Parque Tecnológico de Alcalá, Alcalá de Henares, Madrid, Spain
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Garoz-Ruiz J, Heras A, Colina A. Direct Determination of Ascorbic Acid in a Grapefruit: Paving the Way for In Vivo Spectroelectrochemistry. Anal Chem 2017; 89:1815-1822. [DOI: 10.1021/acs.analchem.6b04155] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jesus Garoz-Ruiz
- Department of Chemistry, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001 Burgos, Spain
| | - Aranzazu Heras
- Department of Chemistry, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001 Burgos, Spain
| | - Alvaro Colina
- Department of Chemistry, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001 Burgos, Spain
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Engineering of Microbial Electrodes. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2017; 167:135-180. [PMID: 28864879 DOI: 10.1007/10_2017_16] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This chapter provides an overview of the current state-of-the-art in the engineering of microbial electrodes for application in microbial electrosynthesis. First, important functional aspects and requirements of basic materials for microbial electrodes are introduced, including the meaningful benchmarking of electrode performance, a comparison of electrode materials, and methods to improve microbe-electrode interaction. Suitable current collectors and composite materials that combine different functionalities are also discussed. Subsequently, the chapter focuses on the design of macroscopic electrode structures. Aspects such as mass transfer and electrode topology are touched upon, and a comparison of the performance of microbial electrodes relevant for practical application is provided. The chapter closes with an overall conclusion and outlook, highlighting the future prospects and challenges for the engineering of microbial electrodes toward practical application in the field of microbial electrosynthesis. Graphical Abstract.
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Anodic biofilms as the interphase for electroactive bacterial growth on carbon veil. Biointerphases 2016; 11:031013. [PMID: 27609094 DOI: 10.1116/1.4962264] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The structure and activity of electrochemically active biofilms (EABs) are usually investigated on flat electrodes. However, real world applications such as wastewater treatment and bioelectrosynthesis require tridimensional electrodes to increase surface area and facilitate EAB attachment. The structure and activity of thick EABs grown on high surface area electrodes are difficult to characterize with electrochemical and microscopy methods. Here, the authors adopt a stacked electrode configuration to simulate the high surface and the tridimensional structure of an electrode for large-scale EAB applications. Each layer of the stacked electrode is independently characterized using confocal laser scanning microscopy (CLSM) and digital image processing. Shewanella oneidensis MR-1 biofilm on stacked carbon veil electrodes is grown under constant oxidative potentials (0, +200, and +400 mV versus Ag/AgCl) until a stable current output is obtained. The textural, aerial, and volumetric parameters extracted from CLSM images allow tracking of the evolution of morphological properties within the stacked electrodes. The electrode layers facing the bulk liquid show higher biovolumes compared with the inner layer of the stack. The electrochemical performance of S. oneidensis MR-1 is directly linked to the overall biofilm volume as well as connectivity between cell clusters.
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Yuan Y, Guo T, Qiu X, Tang J, Huang Y, Zhuang L, Zhou S, Li Z, Guan BO, Zhang X, Albert J. Electrochemical Surface Plasmon Resonance Fiber-Optic Sensor: In Situ Detection of Electroactive Biofilms. Anal Chem 2016; 88:7609-16. [DOI: 10.1021/acs.analchem.6b01314] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yong Yuan
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Tuan Guo
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Xuhui Qiu
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Jiahuan Tang
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Yunyun Huang
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Li Zhuang
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Shungui Zhou
- Guangdong
Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China
| | - Zhaohui Li
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Bai-Ou Guan
- Guangdong
Key Laboratory of Optical Fiber Sensing and Communications, Institute
of Photonics Technology, Jinan University, Guangzhou 510632, China
| | - Xuming Zhang
- Department
of Applied Physics, Hong Kong Polytechnic University, Hong Kong, People’s Republic of China
| | - Jacques Albert
- Department
of Electronics, Carleton University, Ottawa K1S5B6, Canada
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Bao H, Zheng Z, Yang B, Liu D, Li F, Zhang X, Li Z, Lei L. In situ monitoring of Shewanella oneidensis MR-1 biofilm growth on gold electrodes by using a Pt microelectrode. Bioelectrochemistry 2016; 109:95-100. [PMID: 26850925 DOI: 10.1016/j.bioelechem.2016.01.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 01/10/2016] [Accepted: 01/26/2016] [Indexed: 10/22/2022]
Abstract
Much attention has been focused on electrochemically active bacteria (EAB) in the application of bioelectrochemical systems (BESs). Studying the EAB biofilm growth mechanism as well as electron transfer mechanism provides a route to upgrade BES performance. But an effective bacterial growth monitoring method on the biofilm scale is still absent in this field. In this work, electrode-attached bacterial biofilms formed by Shewanella oneidensis MR-1 were dynamically monitored through a microelectrode method. For S. oneidensis MR-1, a respiratory electron transport chain is associated with the secretion of riboflavin, severing as the cofactor to the outer membrane c-type cytochromes. The biofilm growth was monitored through adopting riboflavin as an electrochemical probe during the approach of the microelectrode to the biofilm external surface. This method allows in vivo and in situ biofilm monitoring at different growth stages without destructive manipulation. Furthermore, the biofilm growth monitoring results have been proved to be relatively accurate through observation under confocal laser scanning microscopy. We further applied this method to investigate the effects of four environmental factors (the concentrations of dissolved oxygen, sodium lactate, riboflavin as well as the electrode potential) on S. oneidensis MR-1 biofilm development.
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Affiliation(s)
- Han Bao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Zhanwang Zheng
- School of Environmental and Resource Science, Zhejiang A & F University, Hangzhou, China
| | - Bin Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Ding Liu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Feifang Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Xingwang Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Zhongjian Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
| | - Lecheng Lei
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
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Virdis B, Millo D, Donose BC, Lu Y, Batstone DJ, Krömer JO. Analysis of electron transfer dynamics in mixed community electroactive microbial biofilms. RSC Adv 2016. [DOI: 10.1039/c5ra15676a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electrochemically active microbial biofilms are capable to produce electric current when grown onto electrodes. This work investigates the dynamics of electron transfer inside the biofilm as well as at the biofilm/electrode interface.
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Affiliation(s)
- Bernardino Virdis
- The University of Queensland
- Centre for Microbial Electrochemical Systems (CEMES)
- Brisbane
- Australia
- The University of Queensland
| | - Diego Millo
- Biomolecular Spectroscopy/LaserLaB Amsterdam
- Vrije Universiteit Amsterdam
- NL-1081 HV Amsterdam
- The Netherlands
| | - Bogdan C. Donose
- The University of Queensland
- Centre for Microbial Electrochemical Systems (CEMES)
- Brisbane
- Australia
- The University of Queensland
| | - Yang Lu
- The University of Queensland
- Advanced Water Management Centre (AWMC)
- Brisbane
- Australia
| | - Damien J. Batstone
- The University of Queensland
- Advanced Water Management Centre (AWMC)
- Brisbane
- Australia
| | - Jens O. Krömer
- The University of Queensland
- Centre for Microbial Electrochemical Systems (CEMES)
- Brisbane
- Australia
- The University of Queensland
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38
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In Situ Analysis of a Silver Nanoparticle-Precipitating Shewanella Biofilm by Surface Enhanced Confocal Raman Microscopy. PLoS One 2015; 10:e0145871. [PMID: 26709923 PMCID: PMC4692441 DOI: 10.1371/journal.pone.0145871] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/09/2015] [Indexed: 11/19/2022] Open
Abstract
Shewanella oneidensis MR-1 is an electroactive bacterium, capable of reducing extracellular insoluble electron acceptors, making it important for both nutrient cycling in nature and microbial electrochemical technologies, such as microbial fuel cells and microbial electrosynthesis. When allowed to anaerobically colonize an Ag/AgCl solid interface, S. oneidensis has precipitated silver nanoparticles (AgNp), thus providing the means for a surface enhanced confocal Raman microscopy (SECRaM) investigation of its biofilm. The result is the in-situ chemical mapping of the biofilm as it developed over time, where the distribution of cytochromes, reduced and oxidized flavins, polysaccharides and phosphate in the undisturbed biofilm is monitored. Utilizing AgNp bio-produced by the bacteria colonizing the Ag/AgCl interface, we could perform SECRaM while avoiding the use of a patterned or roughened support or the introduction of noble metal salts and reducing agents. This new method will allow a spatially and temporally resolved chemical investigation not only of Shewanella biofilms at an insoluble electron acceptor, but also of other noble metal nanoparticle-precipitating bacteria in laboratory cultures or in complex microbial communities in their natural habitats.
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Alves A, Ly HK, Hildebrandt P, Louro RO, Millo D. Nature of the Surface-Exposed Cytochrome-Electrode Interactions in Electroactive Biofilms of Desulfuromonas acetoxidans. J Phys Chem B 2015; 119:7968-74. [PMID: 26039558 DOI: 10.1021/acs.jpcb.5b03419] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Metal-respiring bacteria are microorganisms capable of oxidizing organic pollutants present in wastewater and transferring the liberated electrons to an electrode. This ability has led to their application as catalysts in bioelectrochemical systems (BESs), a sustainable technology coupling bioremediation to electricity production. Crucial for the functioning of these BESs is a complex protein architecture consisting of several surface-exposed multiheme proteins, called outer membrane cytochromes, wiring the cell metabolism to the electrode. Although the role of these proteins has been increasingly understood, little is known about the protein-electrode interactions and their impact on the performance of BESs. In this study, we used surface-enhanced resonance Raman spectroscopy in combination with electrochemical techniques to unravel the nature of the protein-electrode interaction for the outer membrane cytochrome OmcB from Desulfuromonas acetoxidans (Dace). Comparing the spectroelectrochemical properties of OmcB bound directly to the electrode surface with those of the same protein embedded inside an electroactive biofilm, we have shown that the surface-exposed cytochromes of Dace biofilms are in direct contact with the electrode surface. Even if direct binding causes protein denaturation, the biofilm possesses the ability to minimize the extent of the damage maximizing the amount of cells in direct electrical communication with the electrode.
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Affiliation(s)
- A Alves
- †Instituto de Tecnologia Quı́mica e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República-Estação Agronómica Nacional, 2780-157 Oeiras, Portugal
| | - H K Ly
- ‡Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - P Hildebrandt
- ‡Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - R O Louro
- †Instituto de Tecnologia Quı́mica e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República-Estação Agronómica Nacional, 2780-157 Oeiras, Portugal
| | - D Millo
- §Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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40
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Beese-Vasbender PF, Nayak S, Erbe A, Stratmann M, Mayrhofer KJ. Electrochemical characterization of direct electron uptake in electrical microbially influenced corrosion of iron by the lithoautotrophic SRB Desulfopila corrodens strain IS4. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.03.184] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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41
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Estevez-Canales M, Kuzume A, Borjas Z, Füeg M, Lovley D, Wandlowski T, Esteve-Núñez A. A severe reduction in the cytochrome C content of Geobacter sulfurreducens eliminates its capacity for extracellular electron transfer. ENVIRONMENTAL MICROBIOLOGY REPORTS 2015; 7:219-226. [PMID: 25348891 DOI: 10.1111/1758-2229.12230] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 09/23/2014] [Indexed: 06/04/2023]
Abstract
The ability of Geobacter species to transfer electrons outside the cell enables them to play an important role in a number of biogeochemical and bioenergy processes. Gene deletion studies have implicated periplasmic and outer-surface c-type cytochromes in this extracellular electron transfer. However, even when as many as five c-type cytochrome genes have been deleted, some capacity for extracellular electron transfer remains. In order to evaluate the role of c-type cytochromes in extracellular electron transfer, Geobacter sulfurreducens was grown in a low-iron medium that included the iron chelator (2,2'-bipyridine) to further sequester iron. Haem-staining revealed that the cytochrome content of cells grown in this manner was 15-fold lower than in cells exposed to a standard iron-containing medium. The low cytochrome abundance was confirmed by in situ nanoparticle-enhanced Raman spectroscopy (NERS). The cytochrome-depleted cells reduced fumarate to succinate as well as the cytochrome-replete cells do, but were unable to reduce Fe(III) citrate or to exchange electrons with a graphite electrode. These results demonstrate that c-type cytochromes are essential for extracellular electron transfer by G. sulfurreducens. The strategy for growing cytochrome-depleted G. sulfurreducens will also greatly aid future physiological studies of Geobacter species and other microorganisms capable of extracellular electron transfer.
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Affiliation(s)
- Marta Estevez-Canales
- Department of Chemical Engineering, University of Alcalá, Alcalá de Henares, Madrid, Spain
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42
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Millo D. An Electrochemical Strategy to Measure the Thickness of Electroactive Microbial Biofilms. ChemElectroChem 2015; 2:288-291. [PMID: 27525209 PMCID: PMC4964880 DOI: 10.1002/celc.201402425] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Indexed: 11/11/2022]
Abstract
The study of electroactive microbial biofilms often requires knowledge of the biofilm thickness. Unfortunately, this parameter is, nowadays, only accessible through expensive microscopic techniques. This work overcomes this limitation by presenting a new strategy, exploiting the use of chronoamperometry (CA) alone. A mixed-culture biofilm is exposed to an O2-saturated solution during anode respiration to suppress its catalytic activity. Assuming that inactivation of the electrocatalytic process is caused by O2 diffusion through the biofilm, a simple relation allows the use of the time constant extracted from the fitting of the curve of the CA trace during inactivation for the straightforward and quantitative determination of biofilm thickness. The biofilm thickness obtained with this method obeys the expected trend reported for biofilm growth and is in agreement with optical measurements. Contrary to the techniques usually employed to determine biofilm thickness, this new strategy is very rapid, nondisruptive, inexpensive, and may become a convenient alternative with respect to expensive and time-consuming microscopic techniques.
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Affiliation(s)
- Diego Millo
- Department of Physics and Astronomy, VU University Amsterdam De Boelelaan 1081, 1081 HV, Amsterdam (The Netherlands) E-mail:
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43
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Millo D, Ly HK. Towards the understanding of the effect of oxygen on the electrocatalytic activity of microbial biofilms: a spectroelectrochemical study. RSC Adv 2015. [DOI: 10.1039/c5ra17429e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Metal-respiring bacteria oxidize an organic substrate and transfer the liberated electrons to the electrode. Molecular oxygen interrupts the current flow by cutting the electrical circuit wiring the cell metabolism to the electrode.
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Affiliation(s)
- D. Millo
- Department of Physics and Astronomy
- VU University Amsterdam
- 1081 HV Amsterdam
- The Netherlands
| | - H. K. Ly
- Technische Universität Berlin
- Institut für Chemie
- Germany
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44
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Huang Y, Kannan P, Zhang L, Rong Y, Dai L, Huang R, Chen T. Close-packed assemblies of discrete tiny silver nanoparticles on triangular gold nanoplates as a high performance SERS probe. RSC Adv 2015. [DOI: 10.1039/c5ra18195j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An island like array of tiny Ag nanoparticles bounded on triangular Au nanoplates was synthesized as surface-enhanced Raman spectroscopy substrate.
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Affiliation(s)
- Youju Huang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Palanisamy Kannan
- Singapore Centre on Environmental Life Science Engineering (SCELSE)
- Nanyang Technological University
- Singapore
| | - Lei Zhang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Yun Rong
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Liwei Dai
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
| | - Rongqin Huang
- Key Laboratory of Smart Drug Delivery
- Ministry of Education (Fudan University)
- Shanghai 201203
- China
| | - Tao Chen
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering
- Chinese Academy of Science
- Ningbo 315201
- China
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Aracic S, Semenec L, Franks AE. Investigating microbial activities of electrode-associated microorganisms in real-time. Front Microbiol 2014; 5:663. [PMID: 25506343 PMCID: PMC4246885 DOI: 10.3389/fmicb.2014.00663] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 11/15/2014] [Indexed: 01/28/2023] Open
Abstract
Electrode-associated microbial biofilms are essential to the function of bioelectrochemical systems (BESs). These systems exist in a number of different configurations but all rely on electroactive microorganisms utilizing an electrode as either an electron acceptor or an electron donor to catalyze biological processes. Investigations of the structure and function of electrode-associated biofilms are critical to further the understanding of how microbial communities are able to reduce and oxidize electrodes. The community structure of electrode-reducing biofilms is diverse and often dominated by Geobacter spp. whereas electrode-oxidizing biofilms are often dominated by other microorganisms. The application of a wide range of tools, such as high-throughput sequencing and metagenomic data analyses, provide insight into the structure and possible function of microbial communities on electrode surfaces. However, the development and application of techniques that monitor gene expression profiles in real-time are required for a more definite spatial and temporal understanding of the diversity and biological activities of these dynamic communities. This mini review summarizes the key gene expression techniques used in BESs research, which have led to a better understanding of population dynamics, cell–cell communication and molecule-surface interactions in mixed and pure BES communities.
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Affiliation(s)
- Sanja Aracic
- Applied and Environmental Microbiology Laboratory, Department of Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Lucie Semenec
- Applied and Environmental Microbiology Laboratory, Department of Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Ashley E Franks
- Applied and Environmental Microbiology Laboratory, Department of Microbiology, La Trobe University , Melbourne, VIC, Australia
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46
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Strycharz-Glaven SM, Roy J, Boyd D, Snider R, Erickson JS, Tender LM. Electron Transport through Early Exponential-Phase Anode-GrownGeobacter sulfurreducensBiofilms. ChemElectroChem 2014. [DOI: 10.1002/celc.201402168] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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47
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Sharma M, Bajracharya S, Gildemyn S, Patil SA, Alvarez-Gallego Y, Pant D, Rabaey K, Dominguez-Benetton X. A critical revisit of the key parameters used to describe microbial electrochemical systems. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.111] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Maestro B, Ortiz JM, Schrott G, Busalmen JP, Climent V, Feliu JM. Crystallographic orientation and electrode nature are key factors for electric current generation by Geobacter sulfurreducens. Bioelectrochemistry 2014; 98:11-9. [DOI: 10.1016/j.bioelechem.2014.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/18/2014] [Accepted: 02/19/2014] [Indexed: 12/20/2022]
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49
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Virdis B, Millo D, Donose BC, Batstone DJ. Real-time measurements of the redox states of c-type cytochromes in electroactive biofilms: a confocal resonance Raman Microscopy study. PLoS One 2014; 9:e89918. [PMID: 24587123 PMCID: PMC3934938 DOI: 10.1371/journal.pone.0089918] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 01/28/2014] [Indexed: 11/19/2022] Open
Abstract
Confocal Resonance Raman Microscopy (CRRM) was used to probe variations of redox state of c-type cytochromes embedded in living mixed-culture electroactive biofilms exposed to different electrode polarizations, under potentiostatic and potentiodynamic conditions. In the absence of the metabolic substrate acetate, the redox state of cytochromes followed the application of reducing and oxidizing electrode potentials. Real-time monitoring of the redox state of cytochromes during cyclic voltammetry (CV) in a potential window where cytochromes reduction occurs, evidenced a measurable time delay between the oxidation of redox cofactors probed by CV at the electrode interface, and oxidation of distal cytochromes probed by CRRM. This delay was used to tentatively estimate the diffusivity of electrons through the biofilm. In the presence of acetate, the resonance Raman spectra of young (10 days, j = 208±49 µA cm−2) and mature (57 days, j = 267±73 µA cm−2) biofilms show that cytochromes remained oxidized homogeneously even at layers as far as 70 µm from the electrode, implying the existence of slow metabolic kinetics that do not result in the formation of a redox gradient inside the biofilm during anode respiration. However, old biofilms (80 days, j = 190±37 µA cm−2) with thickness above 100 µm were characterized by reduced catalytic activity compared to the previous developing stages. The cytochromes in these biofilm were mainly in the reduced redox state, showing that only aged mixed-culture biofilms accumulate electrons during anode respiration. These results differ substantially from recent observations in pure Geobacter sulfurreducens electroactive biofilms, in which accumulation of reduced cytochromes is already observed in thinner biofilms, thus suggesting different bottlenecks in current production for mixed-culture and G. sulfurreducens biofilms.
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Affiliation(s)
- Bernardino Virdis
- Centre for Microbial Electrosynthesis (CEMES), The University of Queensland, Brisbane, Queensland, Australia
- Advanced Water Management Centre (AWMC), The University of Queensland, Brisbane, Queensland, Australia
- * E-mail:
| | - Diego Millo
- Biomolecular Spectroscopy/LaserLaB Amsterdam, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Bogdan C. Donose
- Centre for Microbial Electrosynthesis (CEMES), The University of Queensland, Brisbane, Queensland, Australia
- Advanced Water Management Centre (AWMC), The University of Queensland, Brisbane, Queensland, Australia
| | - Damien J. Batstone
- Advanced Water Management Centre (AWMC), The University of Queensland, Brisbane, Queensland, Australia
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Lebedev N, Strycharz-Glaven SM, Tender LM. Spatially resolved confocal resonant Raman microscopic analysis of anode-grown Geobacter sulfurreducens biofilms. Chemphyschem 2014; 15:320-7. [PMID: 24402861 DOI: 10.1002/cphc.201300984] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Indexed: 11/09/2022]
Abstract
When grown on the surface of an anode electrode, Geobacter sulfurreducens forms a multi-cell thick biofilm in which all cells appear to couple the oxidation of acetate with electron transport to the anode, which serves as the terminal metabolic electron acceptor. Just how electrons are transported through such a biofilm from cells to the underlying anode surface over distances that can exceed 20 microns remains unresolved. Current evidence suggests it may occur by electron hopping through a proposed network of redox cofactors composed of immobile outer membrane and/or extracellular multi-heme c-type cytochromes. In the present work, we perform a spatially resolved confocal resonant Raman (CRR) microscopic analysis to investigate anode-grown Geobacter biofilms. The results confirm the presence of an intra-biofilm redox gradient whereby the probability that a heme is in the reduced state increases with increasing distance from the anode surface. Such a gradient is required to drive electron transport toward the anode surface by electron hopping via cytochromes. The results also indicate that at open circuit, when electrons are expected to accumulate in redox cofactors involved in electron transport due to the inability of the anode to accept electrons, nearly all c-type cytochrome hemes detected in the biofilm are oxidized. The same outcome occurs when a comparable potential to that measured at open circuit (-0.30 V vs. SHE) is applied to the anode, whereas nearly all hemes are reduced when an exceedingly negative potential (-0.50 V vs. SHE) is applied to the anode. These results suggest that nearly all c-type cytochrome hemes detected in the biofilm can be electrochemically accessed by the electrode, but most have oxidation potentials too negative to transport electrons originating from acetate metabolism. The results also reveal a lateral heterogeneity (x-y dimensions) in the type of c-type cytochromes within the biofilm that may affect electron transport to the electrode.
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Affiliation(s)
- Nikolai Lebedev
- Center for Bio/Molecular Science and Engineering, US Naval Research Laboratory, Washington, DC 20375 (USA).
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