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Comparative Analysis of the Genomes of Bombyx mandarina and Bombyx mori Nucleopolyhedroviruses
Yi-Peng Xu,Zheng-Pei Ye,Chang-Ying Niu,Yan-Yuan Bao,Wen-Bing Wang,Wei-De Shen,Chuan-Xi Zhang 한국미생물학회 2010 The journal of microbiology Vol.48 No.1
The Bombyx mandarina nucleopolyhedrovirus (BomaNPV) S1 strain can infect the silkworm, Bombyx mori,but is significantly less virulent than B. mori nucleopolyhedrovirus (BmNPV) T3 strain. The complete nucleotide sequence of the S1 strain of BomaNPV was determined and compared with the BmNPV T3 strain. The circular, double stranded DNA genome of the S1 strain was 126,770 nucleotides long (GenBank accession no. FJ882854), with a G+C content of 40.23%. The genome contained 133 potential ORFs. Most of the putative proteins were more than 96% identical to homologs in the BmNPV T3 strain, except for bro-a, lef-12,bro-c, and bro-d. Compared with the BmNPV T3 strain, however, this genome did not encode the bro-b and bro-e genes. In addition, hr1 lacked two repeat units, while hr2L, hr2R, hr3, hr4L, hr4R, and hr5 were similar to the corresponding hrs in the T3 strain. The sequence strongly suggested that BomaNPV and BmNPV are variants with each other, and supported the idea that baculovirus strain heterogeneity may often be caused by variation in the hrs and bro genes.