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The sequence of the Orgyia pseudotsugata multinucleocapsid nuclear polyhedrosis virus genome
C H Ahrens1, R L Russell, C J Funk
1Department of Agricultural Chemistry, Oregon State University, Corvallis 97331-7301, USA.
Abstract:
The nucleotide sequence of the Orgyia pseudotsugata multinucleocapsid nuclear polyhedrosis virus (OpMNPV) genome was completed and analyzed. It is composed of 131,990 bases with a G + C content of 55% and contains 152 putative genes of 150 nucleotides or greater. Major differences in gene content and arrangement between OpMNPV and the Autographa californica MNPV were found. These include the presence in OpMNPV of three complete iap gene homologs, two conotoxin gene homologs, two protein tyrosine phosphatase homologs, and genes encoding homologs of dUTPase and the large and small subunits of ribonucleotide reductase. Seven major intergenic repeated regions were identified. Five of these are homologous regions that are related to similar regions from other baculoviruses.
Insights
The Orgyia pseudotsugata multinucleocapsid nuclear polyhedrosis virus (OpMNPV) genome was sequenced, revealing 152 genes and significant differences compared to other baculoviruses. Key unique genes and repeated regions were identified in this OpMNPV genome analysis.
Area of Science:
- Virology
- Genomics
- Molecular Biology
Background:
- Baculoviruses are double-stranded DNA viruses used as expression vectors.
- Orgyia pseudotsugata multinucleocapsid nuclear polyhedrosis virus (OpMNPV) is a significant insect pathogen.
- Comparative genomics is crucial for understanding viral evolution and function.
Purpose of the Study:
- To determine the complete nucleotide sequence of the OpMNPV genome.
- To identify putative genes and analyze genomic features.
- To compare the OpMNPV genome with other baculoviruses, particularly Autographa californica MNPV (AcMNPV).
Main Methods:
- Whole-genome sequencing of OpMNPV.
- Bioinformatic analysis to identify open reading frames (ORFs) and gene functions.
- Comparative genomic analysis with related baculovirus sequences.
Main Results:
- The OpMNPV genome consists of 131,990 base pairs with a G+C content of 55%.
- 152 putative genes encoding proteins of 150 nucleotides or greater were identified.
- Significant differences in gene content and arrangement were observed compared to AcMNPV, including unique homologs for iap, conotoxin, protein tyrosine phosphatase, dUTPase, and ribonucleotide reductase subunits.
- Seven major intergenic repeated regions were identified, with five showing homology to regions in other baculoviruses.
Conclusions:
- The genomic sequence provides a comprehensive resource for OpMNPV research.
- Comparative analysis highlights the genetic diversity within the Baculoviridae family.
- The identified unique genes and repeated regions offer insights into OpMNPV-specific biology and evolution.