Journal
JOURNAL OF ASIA-PACIFIC ENTOMOLOGY
Volume 15, Issue 2, Pages 259-263Publisher
KOREAN SOC APPLIED ENTOMOLOGY
DOI: 10.1016/j.aspen.2012.01.006
Keywords
Picorna-like virus; Iflavirus; Spodoptera exigua; Complete genome; Gene organization; Phylogenetic analysis
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Funding
- Next-Generation Bio-Green 21 Program, Rural Development Administration, Republic of Korea [PJ007995]
- Brain Korea 21 project
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The complete genome sequence and the gene organization of a novel insect picorna-like virus, Spodoptera exigua virus (SeV), were determined. The genomic RNA of the SeV was 9501 lit in length excluding the poly(A) tail and contained a single, large open reading frame (nt 392-9424) encoding a 3010 aa polyprotein. Sequence comparisons with other viral polyproteins revealed that the consensus sequences for picornavirus RNA helicase, cysteine protease, and RNA-dependent RNA polymerase (RdRp) proteins are found on the genome in that order from the 5' to the 3' end. In terms of sequence similarity, identity, and genome organization, SeV resembled insect picorna-like viruses belonging to the genus Iflavirus. A phylogenetic analysis based on the eight conserved domains in the RdRp sequence showed that SeV was most closely related to the Perina nuda virus and Ectropis obliqua picorna-like virus, suggesting that these three insect picorna-like viruses might share a common ancestor. (C) Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society, 2012. Published by Elsevier B.V. All rights reserved.
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