Crenarchaeota

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Crenarchaeota

one of two KINGDOMS of the DOMAIN ARCHAEA, which contains extreme thermophiles (see THERMOPHILIC). The kingdom is more commonly called the crenotes. See CLASSIFICATION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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All retrieved archaeal amoA sequences were matched with uncultured crenarchaeotes.
In the aforementioned studies, increasing abundance of crenarchaeotes correlated with decreasing nutrient (organic carbon and inorganic nitrogen) and oxygen concentrations in deeper soil layers.
Certain crenarchaeotic groups are thought to be confined to specific environments; for example, group 1.1a consists mainly of aquatic organisms, while the members of group 1.1b are typical soil crenarchaeotes [7].
Phylogenetic analysis of 10 archaeal amoA OTUs revealed a high sequence identity (98-100%) with ammonia-oxidizing crenarchaeotes. Cluster I from the phylogenetic tree of the amoA gene sequences was formed by two OTUs from Sliv, whereas clusters II and III were only composed of OTUs from the Buhovo soil environments (Figure 4).
Moreover, it is closely affiliated (99% SSL) with the uncultured crenarchaeote Gitt-GR-74 (AJ535122), which is found in uranium mill tailing in Saxony, Germany [13].
This sequence exhibits high similarity to the uncultured crenarchaeote QA4 (99% SSL), which was recovered from quartz rocks located in the high-altitude tundra of Central Tibet [59].
Spieck et al., "A moderately thermophilic ammonia-oxidizing crenarchaeote from a hot spring," Proceedings of the National Academy of Sciences of the United States of America, vol.
As part of a collaborative effort, our laboratory is using genomic technologies to investigate the evolution of an as-yet uncultivated archaeal group, the nonthermophilic crenarchaeotes. The domain Archaea comprises two kingdoms, the Euryarchaeota and Crenarchaeota (2).
Crenarchaeotes apparently originated in hot environments, as suggested by recent molecular ecological surveys of Archaea in hot springs (4).
The sponge-crenarchaeal symbiosis provides an excellent, and currently the most tractable, opportunity for genomic analysis of nonthermophilic crenarchaeotes. Initial work has included construction of several "fosmid" libraries prepared from partially purified C.
We recently discovered and began preliminary work on a tractable system aimed at whole genome sequencing of an uncultivated psychrophilic crenarchaeote. Specifically, high densities of a single species of psychrophilic, symbiotic crenarchaeon, Cenarchaeum symbiosum, were discovered within the tissues of its host, the marine sponge Axinella mexicana (5).
Genetic and functional properties of uncultivated thermophilic crenarchaeotes from a subsurface gold mine as revealed by analysis of genome fragments.