Complete genome sequence of invertebrate iridovirus IIV22A, a variant of IIV22, isolated originally from a blackfly larva
2014
Piegu, Benoit | Guizard, Sébastien | Yeping, Tan | Cruaud, Corinne | Couloux, Arnaud | Bideshi, Dennis K. | Federici, Brian A. | Bigot, Yves | Physiologie de la reproduction et des comportements [Nouzilly] (PRC) ; Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur] (IFCE)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) | Genoscope - Centre national de séquençage [Evry] (GENOSCOPE) ; Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) | University of California [Riverside] (UC Riverside) ; University of California (UC) | Interdepartmental Graduate Programs in Cell, Molecular and Developmental Biology ; University of California (UC) | 3Interdepartmental Graduate Programs in Cell, Molecular and Developmental Biology ; University of California (UC) | Department of Entomology ; School of Medicine-University of California (UC) | California Baptist University (CBU) | Department of Entomology and 3Interdepartmental Graduate Programs in Cell, Molecular and Developmental Biology ; University of California (UC) | CNRS, Genoscope, Ministère de l'Education Nationale, de la Recherche et de la Technologie, Groupement de Recherche CNRS3546
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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