Complete genome sequence of invertebrate iridovirus IIV22A,a variant of IIV22, isolated originally from a blackfly larva |
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| Authors: | Beno?t Piégu Sébastien Guizard Tan Yeping Corinne Cruaud Arnault Couloux Dennis K Bideshi Brian A Federici Yves Bigot |
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| Institution: | 1.UMR INRA-CNRS 7247, PRC, Centre INRA de Nouzilly, Nouzilly, France;2. Department of Entomology and 3.Interdepartmental Graduate Programs in Cell, Molecular and Developmental Biology, University of California, Riverside, California, USA;4.CEA/Institut de Génomique GENOSCOPE, Evry CEDEX, France;5.California Baptist University, Riverside, California, USA |
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| Abstract: | Members of the family Iridoviridae are animal viruses that infect only invertebrates and poikilothermic vertebrates. The invertebrate iridoviruses 22 (IIV22) and 25 (IIV25) were originally isolated from a single sample of blackfly larva (Simulium spp., order Diptera) collected from the Ystwyth river near Aberystwyth, Wales. Recently, the genomes of IIV22 (197.7 kbp) and IIV25 (204.8 kbp) were sequenced and reported. Here, we describe the complete genome sequence of IIV22A, a variant that was isolated from the same pool of virions collected from the blackfly larva from which the IIV22 virion genome originated. The IIV22A genome, 196.5 kbp, is smaller than IIV22. Nevertheless, it contains 7 supplementary putative ORFs. Its analysis enables evaluation of the degree of genomic polymorphisms within an IIV isolate. Despite the occurrence of this IIV variant with IIV22 and IIV25 in a single blackfly larva and the features of their DNA polymerase, we found no evidence of lateral genetic transfers between the genomes of these two IIV species. |
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| Keywords: | iridoviridae iridovirus dsDNA virus insect invertebrate MITE intein |
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