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Pathogenicity and complete genome sequence analysis of the mud crab dicistrovirus-1

文献类型: 外文期刊

作者: Guo, Zhi-Xun 1 ; He, Jian-Guo 1 ; Xu, Hai-Dong 2 ; Weng, Shao-Ping 1 ;

作者机构: 1.Sun Yat Sen Univ, State Key Lab Biocontrol, Sch Life Sci, MOE Key Lab Aquat Prod Safety, Guangzhou 510275, Guangdong, Peoples R China

2.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510275, Guangdong, Peoples R China

3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

关键词: Complete genome sequence;Mud crab dicistrovirus-1;Scylla paramamosain

期刊名称:VIRUS RESEARCH ( 影响因子:3.303; 五年影响因子:3.445 )

ISSN:

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收录情况: SCI

摘要: A virus with a particle diameter of approximately 30. nm and no envelope was purified from diseased mud crab, Scylla paramamosain and it was demonstrated to be pathogenic to mud crab. The complete nucleotide sequence analysis indicated that its genome was a single molecule of linear positive-sense ssRNA with a length of 10,415 nucleotides, excluding the 3'poly (A) tail. It consisted of two open reading frames (ORF) separated by an intergenic region (IGR) and flanked by a 5'untranslated region (5'-UTR) and a 3'untranslated region (3'-UTR). The 5'-ORF encode five putative non-structural proteins, including BIR (Baculovirus Inhibitor of Apoptosis Protein Repeat), helicase, VPg (the genome-linked viral protein), 3C-like protease and RdRP (RNA-dependent RNA polymerase), while the 3'-ORF encode the structural protein precursors. This genome organization was consistent with the typical organization of dicistrovirus and the virus was designated as mud crab dicistrovirus-1 (MCDV-1). The results of the phylogenetic analysis of the putative structural protein precursor suggest that MCDV-1 has a closer genetic relationship with Taura syndrome virus (TSV) than do other dicistroviruses and that MCDV-1 is a new member of the family Dicistroviridae and assigned into the genus Aparavirus. ? 2012 Elsevier B.V.

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