tailieunhanh - Báo cáo y học: "Nanoarchaea: representatives of a novel archaeal phylum or a fast-evolving euryarchaeal lineage related to Thermococcales"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Nanoarchaea: representatives of a novel archaeal phylum or a fast-evolving euryarchaeal lineage related to Thermococcales? | Research Open Access Nanoarchaea representatives of a novel archaeal phylum or a fast-evolving euryarchaeal lineage related to Thermococcales Celine Brochier Simonetta Gribaldo Yvan Zivanovic Fabrice Confalonieri and Patrick Forterren Addresses EA EGEE Evolution Génomique Environnement Université Aix-Marseille I Centre Saint-Charles 3 Place Victor Hugo 13331 Marseille Cedex 3 France. ỶUnite Biologie Moléculaire du Gène chez les Extremophiles Institut Pasteur 25 rue du Dr Roux 75724 Paris Cedex 15 France. Institut de Génétique et Microbiologie UMR CNRS 8621 Université Paris-Sud 91405 Orsay France. Correspondence Celine Brochier. E-mail . Simonetta Gribaldo. E-mail simo@ Published 14 April 2005 Genome Biology 2005 6 R42 doi 186 gb-2005-6-5-r42 The electronic version of this article is the complete one and can be found online at http 2005 6 5 R42 Received 3 December 2004 Revised 10 February 2005 Accepted 9 March 2005 2005 Brochier et al. licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Cultivable archaeal species are assigned to two phyla - the Crenarchaeota and the Euryarchaeota - by a number of important genetic differences and this ancient split is strongly supported by phylogenetic analysis. The recently described hyperthermophile Nanoarchaeum equitans harboring the smallest cellular genome ever sequenced 480 kb has been suggested as the representative of a new phylum - the Nanoarchaeota - that would have diverged before the Crenarchaeota Euryarchaeota split. Confirming the phylogenetic position of N. equitans is thus crucial for deciphering the history of the archaeal domain. Results We tested the placement of N. equitans in the archaeal .