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Res Microbiol. 2013 Jun;164(5):425-38. doi: 10.1016/j.resmic.2013.02.006. Epub 2013 Mar 5.

Metagenomics of Kamchatkan hot spring filaments reveal two new major (hyper)thermophilic lineages related to Thaumarchaeota.

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Aix-Marseille Université, Laboratoire de Chimie Bacterienne - UMR CNRS 7283, IFR88, 31 chemin Joseph Aiguier, F-13402 Marseille, France.


Based on phylogenetic analyses and gene distribution patterns of a few complete genomes, a new distinct phylum within the Archaea, the Thaumarchaeota, has recently been proposed. Here we present analyses of six archaeal fosmid sequences derived from a microbial hot spring community in Kamchatka. The phylogenetic analysis of informational components (ribosomal RNAs and proteins) reveals two major (hyper-)thermophilic clades ("Hot Thaumarchaeota-related Clade" 1 and 2, HTC1 and HTC2) related to Thaumarchaeota, representing either deep branches of this phylum or a new archaeal phylum and provides information regarding the ancient evolution of Archaea and their evolutionary links with Eukaryotes.

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