AiM  Vol.4 No.15 , November 2014
Genome Annotation and Comparative Genomics of ORF Virus
ABSTRACT
ORF virus (ORFV), the etiological agent of contagious pustular dermatitis in small ruminants, belongs to members of the genus Parapoxvirus of the Poxviridae. The genome of the ORFV is dsDNA of 139,962 bp which has about 89% coding region, 63% GC content and codes 130 proteins. There are four unique genes within the genome revealed by homology search of them two posses’ strong regulatory region and transmembrane helices. One of the ORF-039 contains signal peptide indicating the possibilities to be secretory protein coding gene. Comparative genomic analysis reveals significant differences in Bovine Papular Stomatitis Virus (BPSV) strain BV-AR02 and ORFV strain OV-SA00, and these may account for differences in host range. Interspecies sequence variability is observed in all functional classes of genes but is the highest in putative virulence/host range genes. Notably, ORFV contains genes which are homologous of Vaccinia virus. Phylogenetic analysis reveals that although divergent, ORFV virus is distinct from other known mammalian cowpox virus. An improved understanding of Parapoxvirus (PPV) biology will permit the engineering of novel vaccine viruses and expression vectors with enhanced efficacy and greater versatility. The novel vaccine will have a significant role in the economy of a country through the control of disease in an economically important and small ruminant caused by ORFV.

Cite this paper
Mahmud, A. , Rahman, K. , Dey, S. , Islam, T. and Talukder, A. (2014) Genome Annotation and Comparative Genomics of ORF Virus. Advances in Microbiology, 4, 1117-1131. doi: 10.4236/aim.2014.415122.
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