The Big Bang of picorna-like virus evolution antedates the radiation of eukaryotic supergroups - PubMed (original) (raw)
Review
doi: 10.1038/nrmicro2030. Epub 2008 Nov 10.
Affiliations
- PMID: 18997823
- DOI: 10.1038/nrmicro2030
Review
The Big Bang of picorna-like virus evolution antedates the radiation of eukaryotic supergroups
Eugene V Koonin et al. Nat Rev Microbiol. 2008 Dec.
Abstract
The recent discovery of RNA viruses in diverse unicellular eukaryotes and developments in evolutionary genomics have provided the means for addressing the origin of eukaryotic RNA viruses. The phylogenetic analyses of RNA polymerases and helicases presented in this Analysis article reveal close evolutionary relationships between RNA viruses infecting hosts from the Chromalveolate and Excavate supergroups and distinct families of picorna-like viruses of plants and animals. Thus, diversification of picorna-like viruses probably occurred in a 'Big Bang' concomitant with key events of eukaryogenesis. The origins of the conserved genes of picorna-like viruses are traced to likely ancestors including bacterial group II retroelements, the family of HtrA proteases and DNA bacteriophages.
Comment in
- Does the evolution of viral polymerases reflect the origin and evolution of viruses?
Krupovic M, Bamford DH. Krupovic M, et al. Nat Rev Microbiol. 2009 Mar;7(3):250; author reply 250. doi: 10.1038/nrmicro2030-c1. Epub 2009 Feb 9. Nat Rev Microbiol. 2009. PMID: 19198619 No abstract available.
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