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Identification and genomic characterization of a novel fish reovirus, Hubei grass carp disease reovirus, isolated in 2009 in China

文献类型： 外文期刊

作者： Fan, Yuding 1 ; Rao, Shujing 2 ; Zeng, Lingbing 1 ; Ma, Jie 1 ; Zhou, Yong 1 ; Xu, Jin 1 ; Zhang, Hui 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China

2.Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

关键词： Identification;characterization;novel

期刊名称：JOURNAL OF GENERAL VIROLOGY （ 影响因子：3.891； 五年影响因子：3.719 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A novel fish reovirus, Hubei grass carp disease reovirus (HGDRV; formerly grass carp reovirus strain 104, GCRV104), was isolated from diseased grass carp in China in 2009 and the full genome sequence was determined. This reovirus was propagated in a grass carp kidney cell line with a typical cytopathic effect. The total size of the genome was 23 706 bp with a 51 mol% G+C content, and the 11 dsRNA segments encoded 12 proteins (two proteins encoded by segment 11). A nucleotide sequence similarity search using BLASTN found no significant matches except for segment 2, which partially matched that of the RNA-dependent RNA polymerase (RdRp) from several viruses in the genera Aquareovirus and Orthoreovirus of the family Reoviridae. At the amino acid level, seven segments (Seg-1 to Seg-6, and Seg-8) matched with species in the genera Aquareovirus (15-46% identities) and Orthoreovirus (12-44% identities), while for four segments (Seg-7, Seg-9, Seg-10 and Seg-11) no similarities in these genera were found. Conserved terminal sequences, 59-GAAUU--UCAUC-39, were found in each HGDRV segment at the 59 and 39 ends, and the 59-terminal nucleotides were different from any known species in the genus Aquareovirus. Phylogenetic analysis based on RdRp amino acid sequences from members of the family Reoviridae showed that HGDRV clustered with aquareoviruses prior to joining a branch common with orthoreoviruses. Based on these observations, we propose that HGDRV is a new species in the genus Aquareovirus that is distantly related to any known species within this genus.

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