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          Institute: MPI für molekulare Genetik     Collection: Department of Computational Molecular Biology     Display Documents

ID: 309267.0, MPI für molekulare Genetik / Department of Computational Molecular Biology
Horizontal Gene Transfer in Aminoacyl-tRNA Synthetases Including Leucine-Specific Subtypes
Authors:Dohm, Juliane C.; Vingron, Martin; Staub, Eike
Date of Publication (YYYY-MM-DD):2006-09-06
Title of Journal:Journal of Molecular Evolution
Journal Abbrev.:J. Mol. Evol
Issue / Number:4
Start Page:437
End Page:447
Copyright:© Springer. Part of Springer Science+Business Media
Review Status:not specified
Audience:Experts Only
Abstract / Description:Aminoacyl-tRNA synthetases catalyze a fundamental reaction for the flow of genetic information from RNA to protein. Their presence in all organisms known today highlights their important role in the early evolution of life. We investigated the evolutionary history of aminoacyl-tRNA synthetases on the basis of sequence data from more than 200 Archaea, Bacteria, and Eukaryota. Phylogenetic profiles are in agreement with previous observations that many genes for aminoacyl-tRNA synthetases were transferred horizontally between species from all domains of life. We extended these findings by a detailed analysis of the history of leucyl-tRNA synthetases. Thereby, we identified a previously undetected case of horizontal gene transfer from Bacteria to Archaea based on phylogenetic profiles, trees, and networks. This means that, finally, the last subfamily of aminoacyl-tRNA synthetases has lost its exceptional position as the sole subfamily that is devoid of horizontal gene transfer. Furthermore, the leucyl-tRNA synthetase phylogenetic tree suggests a dichotomy of the archaeal/eukaryotic-cytosolic and bacterial/eukaryotic-mitochondrial proteins. We argue that the traditional division of life into Prokaryota (non-chimeric) and Eukaryota (chimeric) is favorable compared to Woese’s trichotomy into Archaea/Bacteria/Eukaryota.
Electronic Supplementary Material Electronic Supplementary material is available for this article at and accessible for authorised users.
Free Keywords:tRNA synthetases - Horizontal gene transfer - Lateral gene transfer - Tree of life - Domains of life - Eocyte hypothesis
Comment of the Author/Creator:Eike Staub
External Publication Status:published
Document Type:Article
Communicated by:Martin Vingron
Affiliations:MPI für molekulare Genetik
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