A new phylum of Archaea represented by a nanosized hyperthermophilic symbiont

@article{Huber2002ANP,
  title={A new phylum of Archaea represented by a nanosized hyperthermophilic symbiont},
  author={Harald Huber and Michael J. Hohn and Reinhard Rachel and Tanja Fuchs and Verena C. Wimmer and K. O. Stetter},
  journal={Nature},
  year={2002},
  volume={417},
  pages={63-67}
}
According to small subunit ribosomal RNA (ss rRNA) sequence comparisons all known Archaea belong to the phyla Crenarchaeota, Euryarchaeota, and—indicated only by environmental DNA sequences—to the ‘Korarchaeota’. Here we report the cultivation of a new nanosized hyperthermophilic archaeon from a submarine hot vent. This archaeon cannot be attached to one of these groups and therefore must represent an unknown phylum which we name ‘Nanoarchaeota’ and species, which we name ‘Nanoarchaeum equitans… 
Nanoarchaea: representatives of a novel archaeal phylum or a fast-evolving euryarchaeal lineage related to Thermococcales?
TLDR
It is indicated that the placement of N. equitans in archaeal phylogenies on the basis of ribosomal protein concatenation may be strongly biased by the coupled effect of its above-average evolutionary rate and lateral gene transfers.
The genome of Nanoarchaeum equitans: Insights into early archaeal evolution and derived parasitism
TLDR
The hyperthermophile Nanoarchaeum equitans is an obligate symbiont growing in coculture with the crenarchaeon Ignicoccus, and represents a basal archaeal lineage and has a highly reduced genome.
Insights into archaeal evolution and symbiosis from the genomes of a nanoarchaeon and its inferred crenarchaeal host from Obsidian Pool, Yellowstone National Park
TLDR
Comparison of the N. equitans and Nst1 genomes suggests that the marine and terrestrial lineages of Nanoarchaeota share a common ancestor that was already a symbiont of another archaeon, enabling further studies of the cellular and molecular mechanisms of these relationships.
The Korarchaeota: Archaeal orphans representing an ancestral lineage of life
TLDR
The cultivation and initial characterization of the first member of the Korarchaeota is described, highly unusual, ultrathin filamentous cells about 0.16 {micro}m in diameter, which likely diverged near the separation of the two major kingdoms of Archaea.
Nanoarchaeal 16S rRNA gene sequences are widely dispersed in hyperthermophilic and mesophilic halophilic environments
TLDR
The results suggest that nanoarchaeotes are not strictly hyperthermophilic organisms, are not restricted to hyperthernophilic hosts and may be found in a large range of environmental conditions.
Uncultured Archaea in a hydrothermal microbial assemblage: phylogenetic diversity and characterization of a genome fragment from a euryarchaeote.
TLDR
This study is the first step in using genomics to reveal the physiology of an as yet uncultured group of archaea from deep-sea hydrothermal vents.
Enigmatic, ultrasmall, uncultivated Archaea
Metagenomics has provided access to genomes of as yet uncultivated microorganisms in natural environments, yet there are gaps in our knowledge—particularly for Archaea—that occur at relatively low
High Archaea diversity in Varvara hot spring, Bulgaria
TLDR
A culture independent molecular phylogenetic analysis revealed high Archaea diversity in a terrestrial hot spring, village Varvara, Bulgaria and characterized the constructed archaeal libraries by the abundance of novel phylotype sequences and the presence of high proportions of Crenarchaeota phylotypes unrelated to cultivated organisms.
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