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Curr Opin Microbiol. 2015 Jun;25:136-45. doi: 10.1016/j.mib.2015.06.008. Epub 2015 Jun 23.

Uncultivated thermophiles: current status and spotlight on 'Aigarchaeota'.

Author information

1
School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA; Nevada Institute of Personalized Medicine, University of Nevada Las Vegas, Las Vegas, NV 89154, USA. Electronic address: brian.hedlund@unlv.edu.
2
School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
3
DOE Joint Genome Institute, Walnut Creek, CA 94598, USA.
4
Department of Biology, California State University, San Bernardino, CA 92407, USA.

Abstract

Meta-analysis of cultivation-independent sequence data shows that geothermal systems host an abundance of novel organisms, representing a vast unexplored phylogenetic and functional diversity among yet-uncultivated thermophiles. A number of thermophiles have recently been interrogated using metagenomic and/or single-cell genomic approaches, including members of taxonomic groups that inhabit both thermal and non-thermal environments, such as 'Acetothermia' (OP1) and 'Atribacteria' (OP9/JS1), as well as the exclusively thermophilic lineages 'Korarchaeota', 'Calescamantes' (EM19), 'Fervidibacteria' (OctSpA1-106), and 'Aigarchaeota' (HWCG-I). The 'Aigarchaeota', a sister lineage to the Thaumarchaeota, likely includes both hyperthermophiles and moderate thermophiles. They inhabit terrestrial, marine, and subsurface thermal environments and comprise at least nine genus-level lineages, several of which are globally distributed.

PMID:
26113243
DOI:
10.1016/j.mib.2015.06.008
[Indexed for MEDLINE]

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