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Genomic characterization of covert mortality nodavirus from farming shrimp: Evidence for a new species within the family Nodaviridae

文献类型： 外文期刊

作者： Xu, Tingting 1 ; Liu, Shuang 1 ; Li, Xiaoping 1 ; Zhang, Qingli 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Marine Aquaculture Dis Control, Key Lab Marine Aquaculture Epidemiol & Biosecur, Yellow Sea Fisheries Res Inst,Minist Agr, Qingdao 266071, Peoples R China

2.Qingdao Natl Lab Marine Sci & Technol, Marine Fisheries Sci & Food Prod Proc Funct Lab, Qingdao 266071, Peoples R China

关键词： Genomic characterization; Genome; Covert mortality nodavirus (CMNV); Novel species; Nodaviridae; Shrimp

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

ISSN： 0168-1702

年卷期： 2020 年 286 卷

页码：

收录情况： SCI

摘要： The prevalence of covert mortality nodavirus (CMNV) has become one of the major threats to the shrimp farming industry in Asia and South America recently. Here, the genomic RNA1 and RNA2 of CMNV were characterized by using transcriptome sequencing and RT-PCR. Our study revealed that RNA1 is 3228 bp in length, and contains two putative Open Reading Frames (ORFs), one encoding the RNA dependent RNA polymerase (RdRp) of length 1043 amino acids and another encoding the protein B2 with a length of 132 amino acids. RNA2 is 1448 bp in length and encodes a capsid protein of 437 amino acids. CMNV shared the highest similarity of 51.78 % for RdRp with the other known nodaviruses. Phylogenetic analyses on the basis of RdRp, B2 and capsid proteins indicated that CMNV might represent a novel viral species in the family Nodaviridae. This study reported the first genome sequence of CMNV and it would be helpful for further studies of CMNV in relation to its evolution, diagnostic technique and control strategy.

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