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Journal Article

Zero-valent sulphur is a key intermediate in marine methane oxidation

MPS-Authors
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Milucka,  J.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Ferdelman,  T. G.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Polerecky,  L.
Permanent Research Group Microsensor, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Franzke,  D.
Nutrient Group, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Wegener,  G.
HGF MPG Joint Research Group for Deep Sea Ecology & Technology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Widdel,  F.
Department of Microbiology, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Kuypers,  M. M. M.
Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society;

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Citation

Milucka, J., Ferdelman, T. G., Polerecky, L., Franzke, D., Wegener, G., Schmid, M., et al. (2012). Zero-valent sulphur is a key intermediate in marine methane oxidation. Nature, 491(7425), 541-546.


Cite as: https://hdl.handle.net/21.11116/0000-0001-D3A2-9
Abstract
Emissions of methane, a potent greenhouse gas, from marine sediments are controlled by anaerobic oxidation of methane coupled primarily to sulphate reduction (AOM). Sulphate-coupled AOM is believed to be mediated by a consortium of methanotrophic archaea (ANME) and sulphate-reducing Deltaproteobacteria but the underlying mechanism has not yet been resolved. Here we show that zero-valent sulphur compounds (S0) are formed during AOM through a new pathway for dissimilatory sulphate reduction performed by the methanotrophic archaea. Hence, AOM might not be an obligate syntrophic process but may be carried out by the ANME alone. Furthermore, we show that the produced S0—in the form of disulphide—is disproportionated by the Deltaproteobacteria associated with the ANME. Our observations expand the diversity of known microbially mediated sulphur transformations and have significant implications for our understanding of the biogeochemical carbon and sulphur cycles.