Brochier-Armanet Céline, Boussau Bastien, Gribaldo Simonetta, Forterre Patrick
Université de Provence, Aix-Marseille I, CNRS, UPR 9043, Laboratoire de Chimie Bactérienne, Institut de Biologie Structurale et de Microbiologie, 13402 Marseille, France.
Nat Rev Microbiol. 2008 Mar;6(3):245-52. doi: 10.1038/nrmicro1852.
The archaeal domain is currently divided into two major phyla, the Euryarchaeota and Crenarchaeota. During the past few years, diverse groups of uncultivated mesophilic archaea have been discovered and affiliated with the Crenarchaeota. It was recently recognized that these archaea have a major role in geochemical cycles. Based on the first genome sequence of a crenarchaeote, Cenarchaeum symbiosum, we show that these mesophilic archaea are different from hyperthermophilic Crenarchaeota and branch deeper than was previously assumed. Our results indicate that C. symbiosum and its relatives are not Crenarchaeota, but should be considered as a third archaeal phylum, which we propose to name Thaumarchaeota (from the Greek 'thaumas', meaning wonder).
古菌域目前分为两个主要门类，即广古菌门和泉古菌门。在过去几年中，已发现了多种未培养的嗜温古菌，并将其归为泉古菌门。最近人们认识到，这些古菌在地球化学循环中发挥着重要作用。基于泉古菌共生嗜泉古菌（Cenarchaeum symbiosum）的首个基因组序列，我们发现这些嗜温古菌不同于嗜热泉古菌，且其分支比之前认为的更深。我们的结果表明，共生嗜泉古菌及其亲缘种并非泉古菌门，而应被视为古菌的第三个门类，我们提议将其命名为奇古菌门（源自希腊语“thaumas”，意为奇妙）。
