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Genomic inference of the metabolism of cosmopolitan subsurface Archaea, Hadesarchaea
Univ Texas Austin, Inst Marine Sci, Dept Marine Sci, Port Aransas, TX 78373 USA..ORCID iD: 0000-0002-5971-1021
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology. Uppsala University, Science for Life Laboratory, SciLifeLab.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular Evolution. Uppsala University, Science for Life Laboratory, SciLifeLab.
Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany..
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2016 (English)In: NATURE MICROBIOLOGY, ISSN EISSN 2058-5276, Vol. 1, no 3, 16002Article in journal (Refereed) Published
Abstract [en]

The subsurface biosphere is largely unexplored and contains a broad diversity of uncultured microbes(1). Despite being one of the few prokaryotic lineages that is cosmopolitan in both the terrestrial and marine subsurface(2-4), the physiological and ecological roles of SAGMEG (South-African Gold Mine Miscellaneous Euryarchaeal Group) Archaea are unknown. Here, we report the metabolic capabilities of this enigmatic group as inferred from genomic reconstructions. Four high-quality (63-90% complete) genomes were obtained from White Oak River estuary and Yellowstone National Park hot spring sediment metagenomes. Phylogenomic analyses place SAGMEG Archaea as a deeply rooting sister clade of the Thermococci, leading us to propose the name Hadesarchaea for this new Archaeal class. With an estimated genome size of around 1.5 Mbp, the genomes of Hadesarchaea are distinctly streamlined, yet metabolically versatile. They share several physiological mechanisms with strict anaerobic Euryarchaeota. Several metabolic characteristics make them successful in the subsurface, including genes involved in CO and H-2 oxidation (or H-2 production), with potential coupling to nitrite reduction to ammonia (DNRA). This first glimpse into the metabolic capabilities of these cosmopolitan Archaea suggests they are mediating key geochemical processes and are specialized for survival in the subsurface biosphere.

Place, publisher, year, edition, pages
2016. Vol. 1, no 3, 16002
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-307456DOI: 10.1038/NMICROBIOL.2016.2ISI: 000383604600014PubMedID: 27572167OAI: oai:DiVA.org:uu-307456DiVA: diva2:1047031
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationEU, European Research Council, 247153-DARCLIFE, 310039-PUZZLE_CELLSwedish Foundation for Strategic Research , FFL12-0024
Available from: 2016-11-16 Created: 2016-11-16 Last updated: 2016-11-16Bibliographically approved

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Baker, Brett J.Lind, Anders E.Ettema, Thijs J. G.
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