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Gene organization and complete sequence of the Hyphantria cunea nucleopolyhedrovirus genome

¹ Laboratory of Sericulture and Entomoresources, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
² Shimadzu Corporation, Nakagyou, Kyoto 604-8511, Japan
³ Laboratory of Biodynamics, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
⁴ Central Laboratory and Greenhouse Complex, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand

Correspondence
Motoko Ikeda
mochiko{at}agr.nagoya-u.ac.jp

The whole-genome sequence of the Hyphantria cunea nucleopolyhedrovirus (HycuNPV) was analysed. The entire nucleotide sequence of the HycuNPV genome was 132 959 bp long, with a G+C content of 45.1 mol%. A total of 148 open reading frames (ORFs) consisting of more than 50 aa were encoded by the genome. HycuNPV shares more than 122 ORFs with other lepidopteran group I NPVs, including Autographa californica MNPV, Bombyx mori NPV, Choristoneura fumiferana MNPV (CfMNPV), Choristoneura fumiferana defective NPV, Epiphyas postvittana MNPV and Orgyia pseudotsugata MNPV (OpMNPV). Six ORFs are identified as being unique to HycuNPV. Most of the HycuNPV ORFs showed higher similarity to CfMNPV and OpMNPV ORFs than to those of the other group I NPVs. HycuNPV encodes two conotoxin-like homologues (ctls), which are observed only in OpMNPV in group I NPVs. HycuNPV encodes three inhibitors of apoptosis (iaps), hycu-iap-1, hycu-iap-2 and hycu-iap-3, a feature that it shares only with CfMNPV. In addition, six homologous regions (hrs) are identified in the HycuNPV genome. These hrs are located in regions similar to those of the OpMNPV hrs, but different from most of the CfMNPV hrs. Based on the close phylogenetic relationship and conservation of group I NPV-specific genes, such as gp64, ie-2 and ptp-1, it is concluded that HycuNPV belongs to the group I NPVs and is most similar to CfMNPV or OpMNPV.

The GenBank/EMBL/DDBJ accession number for the HycuNPV N9 genome sequence is AP009046.

Supplementary material is available in JGV Online.

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