title: The gp64 locus of Anticarsia gemmatalis multicapsid nucleopolyhedrovirus contains a 3' repair exonuclease homologue and lacks v-cath and ChiA genes.
abstract: Anticarsia gemmatalis multicapsid nucleopolyhedrovirus (AgMNPV) is one of the most successful biological insecticides. In this study, we cloned and sequenced a 12.5 kbp BamHI-D restriction endonuclease fragment of the AgMNPV isolate 2D genome that includes the gp64 gene. We compared this highly conserved region with that of other baculoviruses. AgMNPV contained two genes, p22.2 and v-trex, in common with Choristoneura fumiferana MNPV (CfMNPV) that were not present in other baculoviruses. The v-trex gene has homology to a eukaryotic 3' repair exonuclease and appears to have been acquired from an invertebrate host. The v-trex gene product has the potential to be involved in virus recombination or UV-light tolerance. Multigene phylogenetic analysis suggested that AgMNPV is most closely related to Orgyia pseudotsugata MNPV (OpMNPV). AgMNPV differed from other group I NPVs in that ChiA and v-cath gene homologues were missing from the region downstream of the gp64 gene. Proteinase assays and genetic probes suggest the v-cath gene is absent from AgMNPV.
authors.affiliation: Insect Biocontrol Laboratory, USDA, Beltsville, MD 20852, USA.
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Slack
authors.affiliation: Departamento de Biologia Cellular, Universidade de Brasília, CEP 70910-900 Brasília DF, Brazil.
authors.forename: Bergmann M
authors.initials: BM
authors.lastname: Ribeiro
authors.affiliation: Embrapa Recursos Genéticos e Biotecnologia Parque Estação Biológica, CEP 70770-900 Brasília-DF, Brazil.
authors.forename: Marlinda Lobo
authors.initials: ML
authors.lastname: de Souza
mesh_terms: D020413:3' Untranslated Regions; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D002688:Chitinases / Q000235:genetics*; D003546:Cysteine Endopeptidases / Q000235:genetics*; D004260:DNA Repair; D005092:Exonucleases / Q000235:genetics*; D008969:Molecular Sequence Data; D009036:Moths / Q000821:virology*; D017924:Nucleopolyhedroviruses / Q000235:genetics; D010802:Phylogeny; D012091:Repetitive Sequences, Nucleic Acid; D018411:Spodoptera; D014760:Viral Fusion Proteins / Q000235:genetics*; D014764:Viral Proteins / Q000235:genetics
chemical_list: D020413:3' Untranslated Regions; D014760:Viral Fusion Proteins; D014764:Viral Proteins; D005092:Exonucleases; D002688:Chitinases; C094590:chitinase ChiA; D003546:Cysteine Endopeptidases