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J Gen Virol 88 (2007), 1120-1132; DOI 10.1099/vir.0.82651-0

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Sequence and organization of the Heliothis virescens ascovirus genome

Sassan Asgari1, John Davis2, David Wood2, Peter Wilson2 and Annette McGrath2

1 School of Integrative Biology, University of Queensland, St Lucia, QLD 4072, Australia
2 Australian Genome Research Facility, University of Queensland, St Lucia, QLD 4072, Australia

Correspondence
Sassan Asgari
s.asgari{at}uq.edu.au

The nucleotide sequence of the Heliothis virescens ascovirus (HvAV-3e) DNA genome was determined and characterized in this study. The circular genome consists of 186 262 bp, has a G+C content of 45.8 mol% and encodes 180 potential open reading frames (ORFs). Five unique homologous regions (hrs), 23 ‘baculovirus repeat ORFs' (bro) and genes encoding a caspase homologue and several enzymes involved in nucleotide replication and metabolism were found in the genome. Several ascovirus (AV)-, iridovirus- and baculovirus-homologous genes were identified. The genome is significantly larger than the recently sequenced genomes of Trichoplusia ni AV (TnAV-2c) and Spodoptera frugiperda AV (SfAV-1a). Gene-parity plots and overall similarity of ORFs indicate that HvAV-3e is related more closely to SfAV-1a than to TnAV-2c.

The GenBank/EMBL/DDBJ accession number for the sequence reported in this paper is EF133465.




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