Open Access Research article

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

Céline Petitjean12, David Moreira2, Purificación López-García2 and Céline Brochier-Armanet3*

Author Affiliations

1 UPR CNRS 9043, Laboratoire de Chimie Bactérienne, Université d’Aix-Marseille (AMU), 13402 Marseille, Cedex 20, France

2 UMR CNRS 8079, Unité d'Ecologie, Systématique et Evolution Université Paris-Sud, 91405 Orsay, Cedex, France

3 CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, Université Lyon 1, 43 boulevard du 11 novembre 1918, 69622, Villeurbanne, France

For all author emails, please log on.

BMC Evolutionary Biology 2012, 12:226  doi:10.1186/1471-2148-12-226

Published: 26 November 2012

Additional files

Additional file 1:

Table showing the taxonomic distribution of DnaJ-Fer, DnaK, DnaJ and GrpE proteins in Archaea. Numbers correspond to accession numbers in the NCBI Genpep database in the 92 complete genomes available in July 2011 and that of, 'Ca. Nitrosoarchaeum koreensis', a thaumarchaeotal genome available more recently. The two divergent sequences of DnaK and GrpE found in Methanococcus vannielii SB are underlined.

Format: XLS Size: 51KB Download file

This file can be viewed with: Microsoft Excel Viewer

Open Data

Additional file 2:

Unrooted ML tree of the DnaK protein (136 sequences and 444 positions) inferred with TreeFinder and the LG + Γ4 model. Numbers at nodes represent bootstrap values and Bayesian posterior probabilities computed with TreeFinder and MrBayes, respectively (only values >50% and 0.5 are shown, dashes indicate the corresponding support is inferior to the threshold, whereas when both supports are inferior to the thresholds no support values are indicated). Archaeal sequences are shown with colours according to their taxonomic classification. The scale bar represents the average number of substitutions per site.

Format: PDF Size: 240KB Download file

This file can be viewed with: Adobe Acrobat Reader

Open Data

Additional file 3:

Unrooted ML tree of the DnaJ protein (102 sequences and 227 positions) inferred with TreeFinder and the LG + Γ4. Numbers at nodes represent bootstrap values and Bayesian posterior probabilities computed with TreeFinder and MrBayes, respectively (only values >50% and 0.5 are shown, dashes indicate that the corresponding support is inferior to the threshold, whereas when both supports are inferior to the thresholds no support values are indicated). Archaeal sequences are shown with colours according to their taxonomic classification. The scale bar represents the average number of substitutions per site.

Format: PDF Size: 229KB Download file

This file can be viewed with: Adobe Acrobat Reader

Open Data

Additional file 4:

Unrooted ML tree of the GrpE protein (101 sequences and 105 positions) inferred with TreeFinder and the LG + Γ4. Numbers at nodes represent bootstrap values and Bayesian posterior probabilities computed with TreeFinder and MrBayes, respectively (only values >50% and 0.5 are shown, dashes indicate the corresponding value is inferior to the threshold, whereas when both supports are inferior to the thresholds no support values are indicated). Archaeal sequences are shown with colours according to their taxonomic classification. The scale bar represents the average number of substitutions per site.

Format: PDF Size: 228KB Download file

This file can be viewed with: Adobe Acrobat Reader

Open Data