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Nonstructural protein NS17 of grass carp reovirus Honghu strain promotes virus infection by mediating cell-cell fusion and apoptosis

文献类型: 外文期刊

作者: Dai, Yanlin 1 ; Li, Yiqun 1 ; Hu, Xi 1 ; Jiang, Nan 1 ; Liu, Wenzhi 1 ; Meng, Yan 1 ; Zhou, Yong 1 ; Xu, Chen 1 ; Xue, Mingyang 1 ; Fan, Yuding 1 ;

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

2.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 201306, Peoples R China

关键词: Grass carp reovirus Honghu strain; GCRV-HH196; Aquareovirus; NS17; Cell-cell fusion; Apoptosis

期刊名称:VIRUS RESEARCH ( 影响因子:5.0; 五年影响因子:4.0 )

ISSN: 0168-1702

年卷期: 2023 年 334 卷

页码:

收录情况: SCI

摘要: Fusion-associated small transmembrane (FAST) proteins can promote cell fusion, alter membrane permeability and trigger apoptosis to promote virus proliferation in orthoreoviruses. However, it is unknown whether FAST proteins perform these functions in aquareoviruses (AqRVs). Non-structural protein 17 (NS17) carried by grass carp reovirus Honghu strain (GCRV-HH196) belongs to the FAST protein family, and we preliminarily explored its relevance to virus infection. NS17 has similar domains to FAST protein NS16 of GCRV-873, comprising a transmembrane domain, a polybasic cluster, a hydrophobic patch and a polyproline motif. It was observed in the cytoplasm and the cell membrane. Overexpression of NS17 enhanced the efficiency of cell-cell fusion induced by GCRV-HH196 and promoted virus replication. Overexpression of NS17 also led to DNA fragmentation and reactive oxygen species (ROS) accumulation, and it triggered apoptosis. The findings illuminate the functions of NS17 in GCRV infection, and provide a reference for the development of novel antiviral strategies.

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