Phylogenetic analysis of ribosomal RNA sequences obtained from uncultivated organisms of a hot spring in Yellowstone National Park reveals several novel groups of Archaea, many of which diverged from the crenarchaeal line of descent prior to previously characterized members of that kingdom. Universal phylogenetic trees constructed with the addition of these sequences indicate monophyly of Archaea, with modest bootstrap support. The data also show a specific relationship between low-temperature marine Archaea and some hot spring Archaea. Two of the environmental sequences are enigmatic: depending upon the data set and analytical method used, these sequences branch deeply within the Crenarchaeota, below the bifurcation between Crenarchaeota and Euryarchaeota, or even as the sister group to Eukaryotes. If additional data confirm either of the latter two placements, then the organisms represented by these ribosomal RNA sequences would merit recognition as a new kingdom, provisionally named "Korarchaeota."
Evolutionary relationships among eubacterial groups as inferred from GroEL (chaperonin) sequence comparisons
Small subunit ribosomal RNA+ of Hexamita inflata and the quest for the first branch in the eukaryotic tree
Archaeal phylogeny: reexamination of the phylogenetic position of Archaeoglobus fulgidus in light of certain composition-induced artifacts
Composition of the lipids of Nanoarchaeum equitans and their origin from its host Ignicoccus sp. strain KIN4/I
An expansion of age constraints for microbial clades that lack a conventional fossil record using phylogenomic dating.
Methanogenic pathway and archaeal community structure in the sediment of eutrophic Lake Dagow: effect of temperature
Identification of a putative mitochondrial RNA polymerase from Physarum polycephalum: characterization, expression, purification, and transcription in vitro
Order-specific 16S rRNA-targeted oligonucleotide probes for (hyper)thermophilic archaea and bacteria
Nanoarchaeal 16S rRNA gene sequences are widely dispersed in hyperthermophilic and mesophilic halophilic environments.
16S rRNA phylogenetic analysis and quantification of Korarchaeota indigenous to the hot springs of Kamchatka, Russia
Biochemical properties and PCR performance of a family B DNA polymerase from hyperthermophilic Euryarchaeon Thermococcus peptonophilus
A novel archaeal group in the phylum Crenarchaeota found unexpectedly in an eukaryotic survey in the Cariaco Basin.
Diversity of thermophilic fungi in Tengchong Rehai National Park revealed by ITS nucleotide sequence analyses.
Metagenomics of Kamchatkan hot spring filaments reveal two new major (hyper)thermophilic lineages related to Thaumarchaeota
New processes and players in the nitrogen cycle: the microbial ecology of anaerobic and archaeal ammonia oxidation
Complete-fosmid and fosmid-end sequences reveal frequent horizontal gene transfers in marine uncultured planktonic archaea
Geoarchaeota: a new candidate phylum in the Archaea from high-temperature acidic iron mats in Yellowstone National Park
Archaea of the Miscellaneous Crenarchaeotal Group are abundant, diverse and widespread in marine sediments.
Recent advances in genomic sequencing has led to the discovery of new strains of Archaea and shed light on their evolutionary history. Discover the latest research on Archaeogenetics here.