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Appl. Environ. Microbiol. doi:10.1128/AEM.01750-07
Copyright (c) 2007, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Methyl sulfide production by a novel carbon monoxide metabolism in Methanosarcina acetivorans

Department of Geosciences and The Penn State Astrobiology Research Center, The Pennsylvania State University, University Park, PA 16802

^* To whom correspondence should be addressed. Email: jimjmoran{at}gmail.com. c.h.house{at}gmail.com.

	Abstract

We observed dimethyl sulfide (DMS) and methanthiol (MeSH) production in pure incubations of the methanogen Methanosarcina acetivorans when carbon monoxide (CO) served as the only electron donor. Energy conservation likely uses sodium ion gradients for ATP synthesis. This novel metabolism permits methanogen CO utilization, resulting in quantitative sulfide methylation.