| Literature DB >> 12015592 |
Céline Brochier1, Hervé Philippe.
Abstract
The first phyla that emerge in the tree of life based on ribosomal RNA (rRNA) sequences are hyperthermophilic, which led to the hypothesis that the universal ancestor, and possibly the original living organism, was hyperthermophilic. Here we reanalyse the bacterial phylogeny based on rRNA using a more reliable approach, and find that hyperthermophilic bacteria (such as Aquificales and Thermotogales) do not emerge first, suggesting that the Bacteria had a non-hyperthermophilic ancestor. It seems that Planctomycetales, a phylum with numerous peculiarities, could be the first emerging bacterial group.Entities:
Mesh：
Substances：
Year: 2002 PMID： 12015592 DOI： 10.1038/417244a
Source DB: PubMed Journal: Nature ISSN： 0028-0836 Impact factor: 49.962