Remarkable diversity of endogenous viruses in a crustacean genome.
Bottom Line: These fragments result from endogenization, that is, integration of the viral genome into the host germline genome followed by vertical inheritance.We show that viral endogenization occurred recurrently during the evolution of isopods and that A. vulgare viral lineages were involved in multiple host switches that took place between widely divergent taxa.More generally, our results underline the power of paleovirology in characterizing the viral diversity currently infecting eukaryotic taxa.
Affiliation: Université de Poitiers, UMR CNRS 7267 Ecologie et Biologie des Interactions, Equipe Ecologie Evolution Symbiose, Poitiers, France.Show MeSH
Related in: MedlinePlus
Mentions: The 20 A. vulgare circovirus-like sequences (fig. 5; 27–46) seemingly form a monophyletic clade that appears to be most closely related to the unclassified Dragonfly orbiculatus virus (Rosario et al. 2012), though this position is not well supported (bootstrap = 51). Overall, the phylogeny indicates that A. vulgare circovirus-like EVEs likely belong to a new lineage of circular Rep-dependent ssDNA viruses (CRESS-DNA according to Rosario et al. 2012) distantly related to the Circoviridae and Nanoviridae families. In addition, the circovirus-like sequences we found in two mollusc species (the oyster Crassostrea gigas and Lottia gigantea) likely correspond to new nonplant Nanoviridae lineages.
Affiliation: Université de Poitiers, UMR CNRS 7267 Ecologie et Biologie des Interactions, Equipe Ecologie Evolution Symbiose, Poitiers, France.