Multi-heme cytochrome-mediated extracellular electron transfer by the anaerobic methanotroph ‘Candidatus Methanoperedens nitroreducens’
Article
Zhang, Xueqin, Joyce, Georgina H., Leu, Andy O., Zhao, Jing, Rabiee, Hesamoddin, Virdis, Bernardino, Tyson, Gene W., Yuan, Zhiguo, McIlroy, Simon J. and Hu, Shihu. 2023. "Multi-heme cytochrome-mediated extracellular electron transfer by the anaerobic methanotroph ‘Candidatus Methanoperedens nitroreducens’." Nature Communications. 14 (1). https://doi.org/10.1038/s41467-023-41847-w
Article Title | Multi-heme cytochrome-mediated extracellular electron transfer by the anaerobic methanotroph ‘Candidatus Methanoperedens nitroreducens’ |
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ERA Journal ID | 122966 |
Article Category | Article |
Authors | Zhang, Xueqin, Joyce, Georgina H., Leu, Andy O., Zhao, Jing, Rabiee, Hesamoddin, Virdis, Bernardino, Tyson, Gene W., Yuan, Zhiguo, McIlroy, Simon J. and Hu, Shihu |
Journal Title | Nature Communications |
Journal Citation | 14 (1) |
Article Number | 6118 |
Number of Pages | 14 |
Year | 2023 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2041-1723 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41467-023-41847-w |
Web Address (URL) | https://www.nature.com/articles/s41467-023-41847-w |
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. © 2023, Springer Nature Limited. |
Keywords | Anaerobic methanotrophic archaea; multi-heme c-type cytochromes ; extracellular electron transfer |
ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
Byline Affiliations | University of Queensland |
Queensland University of Technology | |
Centre for Future Materials | |
City University of Hong Kong, China |
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