Biogenic Iron Sulfide Nanoparticles to Enable Extracellular Electron Uptake in Sulfate‐Reducing Bacteria
- National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan, Department of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan, CSIRO Land and Water 147 Underwood Avenue Floreat WA 6014 Australia
- Biomolecular Characterization Unit RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
- CSIRO Land and Water 147 Underwood Avenue Floreat WA 6014 Australia, School of Biomedical Sciences University of Western Australia 35 Stirling Highway Nedlands WA 6009 Australia
- National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan, School of Chemical Sciences and Engineering Hokkaido University 5 Chome Kita 8 Jonishi, Kita Ward Sapporo Hokkaido 060-0808 Japan
Abstract Microbes synthesize cell‐associated nanoparticles (NPs) and utilize their physicochemical properties to produce energy under unfavorable metabolic conditions. Iron sulfide (FeS) NPs are ubiquitous and are predominantly biosynthesized by sulfate‐reducing bacteria (SRB). However, the biological role of FeS NPs in SRB remains understudied. Now, conductive FeS NPs function is demonstrated as an electron conduit enabling Desulfovibrio vulgaris Hildenborough, an SRB strain, to utilize solid‐state electron donors via direct electron uptake. After forming FeS NPs on the cell surface, D. vulgaris initiated current generation coupled with sulfate reduction on electrodes poised at −0.4 V versus standard hydrogen electrode. Single‐cell activity analysis showed that the electron uptake and metabolic rate via FeS NPs in D. vulgaris were about sevenfold higher than those via native cell‐surface proteins in other SRB.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1595511
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Vol. 59 Journal Issue: 15; ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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