Publication Date:
2015-10-24
Description:
Methanogenic and methanotrophic archaea play important roles in the global flux of methane. Culture-independent approaches are providing deeper insight into the diversity and evolution of methane-metabolizing microorganisms, but, until now, no compelling evidence has existed for methane metabolism in archaea outside the phylum Euryarchaeota. We performed metagenomic sequencing of a deep aquifer, recovering two near-complete genomes belonging to the archaeal phylum Bathyarchaeota (formerly known as the Miscellaneous Crenarchaeotal Group). These genomes contain divergent homologs of the genes necessary for methane metabolism, including those that encode the methyl-coenzyme M reductase (MCR) complex. Additional non-euryarchaeotal MCR-encoding genes identified in a range of environments suggest that unrecognized archaeal lineages may also contribute to global methane cycling. These findings indicate that methane metabolism arose before the last common ancestor of the Euryarchaeota and Bathyarchaeota.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Evans, Paul N -- Parks, Donovan H -- Chadwick, Grayson L -- Robbins, Steven J -- Orphan, Victoria J -- Golding, Suzanne D -- Tyson, Gene W -- New York, N.Y. -- Science. 2015 Oct 23;350(6259):434-8. doi: 10.1126/science.aac7745.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia 4072, Queensland, Australia. ; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA. ; School of Earth Sciences, University of Queensland, St Lucia 4072, Queensland, Australia. ; Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia 4072, Queensland, Australia. Advanced Water Management Centre, University of Queensland, St Lucia 4072, Queensland, Australia. g.tyson@uq.edu.au.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26494757" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
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Medicine
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Natural Sciences in General
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Physics
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