Sequence Analysis of the Xestia C-Nigrum Granulovirus Genome
Virology 262, 277–297 (1999) Article ID viro.1999.9894, available online at http://www.idealibrary.com on View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Sequence Analysis of the Xestia c-nigrum Granulovirus Genome Tohru Hayakawa,*,1 Rinkei Ko,† Kazuhiro Okano,†,‡ Su-Il Seong,*,2 Chie Goto,*,3 and Susumu Maeda*,†,‡ *Department of Entomology, University of California, Davis, One Shields Avenue, Davis, California 95616; †Laboratory of Molecular Entomology and Baculovirology, The Institute of Physical and Chemical Research (RIKEN), Wako 351-0198, Japan; and ‡Core Research for Evolutional Science and Technology (CREST) Project, JST, Japan Received May 10, 1999; returned to author for revision June 10, 1999; accepted July 8, 1999 The nucleotide sequence of the Xestia c-nigrum granulovirus (XcGV) genome was determined and found to comprise 178,733 bases with a G1C content of 40.7%. It contained 181 putative genes of 150 nucleotides or greater that showed minimal overlap. Eighty-four of these putative genes, which collectively accounted for 43% of the genome, are homologs of genes previously identified in the Autographa californica multinucleocapsid nucleopolyhedrovirus (AcMNPV) genome. These homologs showed on average 33% amino acid sequence identity to those from AcMNPV. Several genes reported to have major roles in AcMNPV biology including ie-2, gp64, and egt were not found in the XcGV genome. However, open reading frames with homology to DNA ligase, two DNA helicases (one similar to a yeast mitochondrial helicase and the other to a putative AcMNPV helicase), and four enhancins (virus enhancing factors) were found.
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