Horizontal gene transfer of a chloroplast DnaJ-Fer protein to Thaumarchaeota and the evolutionary history of the DnaK chaperone system in Archaea

BMC Evolutionary Biology

Research Article

Céline Brochier-Armanet¹  Purificación López-García²  David Moreira²  Céline Petitjean³ 

[1] CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, Université Lyon 1, 43 boulevard du 11 novembre 1918, 69622, Villeurbanne, France;UMR CNRS 8079, Unité d'Ecologie, Systématique et Evolution Université Paris-Sud, 91405, Orsay, Cedex, France;UPR CNRS 9043, Laboratoire de Chimie Bactérienne, Université d’Aix-Marseille (AMU), 13402, Marseille, Cedex 20, France;UMR CNRS 8079, Unité d'Ecologie, Systématique et Evolution Université Paris-Sud, 91405, Orsay, Cedex, France;

关键词: DnaJ/Hsp40;    DnaK/Hsp70;    Hyperthermophily;    Archaeplastida;    Phylogeny;    Archaea;    Thaumarchaeota;    Horizontal gene transfer;    Mesophily;   

DOI  :  10.1186/1471-2148-12-226

 received in 2012-03-19, accepted in 2012-10-25,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundIn 2004, we discovered an atypical protein in metagenomic data from marine thaumarchaeotal species. This protein, referred as DnaJ-Fer, is composed of a J domain fused to a Ferredoxin (Fer) domain. Surprisingly, the same protein was also found in Viridiplantae (green algae and land plants). Because J domain-containing proteins are known to interact with the major chaperone DnaK/Hsp70, this suggested that a DnaK protein was present in Thaumarchaeota. DnaK/Hsp70, its co-chaperone DnaJ and the nucleotide exchange factor GrpE are involved, among others, in heat shocks and heavy metal cellular stress responses.ResultsUsing phylogenomic approaches we have investigated the evolutionary history of the DnaJ-Fer protein and of interacting proteins DnaK, DnaJ and GrpE in Thaumarchaeota. These proteins have very complex histories, involving several inter-domain horizontal gene transfers (HGTs) to explain the contemporary distribution of these proteins in archaea. These transfers include one from Cyanobacteria to Viridiplantae and one from Viridiplantae to Thaumarchaeota for the DnaJ-Fer protein, as well as independent HGTs from Bacteria to mesophilic archaea for the DnaK/DnaJ/GrpE system, followed by HGTs among mesophilic and thermophilic archaea.ConclusionsWe highlight the chimerical origin of the set of proteins DnaK, DnaJ, GrpE and DnaJ-Fer in Thaumarchaeota and suggest that the HGT of these proteins has played an important role in the adaptation of several archaeal groups to mesophilic and thermophilic environments from hyperthermophilic ancestors. Finally, the evolutionary history of DnaJ-Fer provides information useful for the relative dating of the diversification of Archaeplastida and Thaumarchaeota.

【 授权许可】

Unknown   
© Petitjean et al.; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.