Dataset Information

Biological methane production under putative Enceladus-like conditions.

ABSTRACT: The detection of silica-rich dust particles, as an indication for ongoing hydrothermal activity, and the presence of water and organic molecules in the plume of Enceladus, have made Saturn's icy moon a hot spot in the search for potential extraterrestrial life. Methanogenic archaea are among the organisms that could potentially thrive under the predicted conditions on Enceladus, considering that both molecular hydrogen (H2) and methane (CH4) have been detected in the plume. Here we show that a methanogenic archaeon, Methanothermococcus okinawensis, can produce CH4 under physicochemical conditions extrapolated for Enceladus. Up to 72% carbon dioxide to CH4 conversion is reached at 50?bar in the presence of potential inhibitors. Furthermore, kinetic and thermodynamic computations of low-temperature serpentinization indicate that there may be sufficient H2 gas production to serve as a substrate for CH4 production on Enceladus. We conclude that some of the CH4 detected in the plume of Enceladus might, in principle, be produced by methanogens.

SUBMITTER: Taubner RS

PROVIDER: S-EPMC5829080 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Biological methane production under putative Enceladus-like conditions.

Taubner Ruth-Sophie RS Pappenreiter Patricia P Zwicker Jennifer J Smrzka Daniel D Pruckner Christian C Kolar Philipp P Bernacchi Sébastien S Seifert Arne H AH Krajete Alexander A Bach Wolfgang W Peckmann Jörn J Paulik Christian C Firneis Maria G MG Schleper Christa C Rittmann Simon K-M R SKR

Nature communications 20180227 1

The detection of silica-rich dust particles, as an indication for ongoing hydrothermal activity, and the presence of water and organic molecules in the plume of Enceladus, have made Saturn's icy moon a hot spot in the search for potential extraterrestrial life. Methanogenic archaea are among the organisms that could potentially thrive under the predicted conditions on Enceladus, considering that both molecular hydrogen (H<sub>2</sub>) and methane (CH<sub>4</sub>) have been detected in the plume. ...[more]

PMID: 29487311

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Dataset Information

Biological methane production under putative Enceladus-like conditions.

Publications

Biological methane production under putative Enceladus-like conditions.

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