期刊
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
卷 84, 期 6, 页码 -出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.02289-17
关键词
methanotrophy; methanobactin; copper; mercury; rare-earth elements
资金
- Helmholtz Zentrum Munchen
- University of Michigan Office of Research
- National Science Foundation [1724744]
- Department of Energy [DE-SC0018059]
- C1 Gas Refinery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2015M3D3A1A01064882]
Aerobic methanotrophs have long been known to play a critical role in the global carbon cycle, being capable of converting methane to biomass and carbon dioxide. Interestingly, these microbes exhibit great sensitivity to copper and rare-earth elements, with the expression of key genes involved in the central pathway of methane oxidation controlled by the availability of these metals. That is, these microbes have a copper switch that controls the expression of alternative methane monooxygenases and a rare-earth element switch that controls the expression of alternative methanol dehydrogenases. Further, it has been recently shown that some methanotrophs can detoxify inorganic mercury and demethylate methylmercury; this finding is remarkable, as the canonical organomercurial lyase does not exist in these methanotrophs, indicating that a novel mechanism is involved in methylmercury demethylation. Here, we review recent findings on methanotrophic interactions with metals, with a particular focus on these metal switches and the mechanisms used by methanotrophs to bind and sequester metals.
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