Heat shock protein 70 is necessary for Rice stripe virus infection in plants

文献类型： 外文期刊

第一作者： Jiang, Shanshan

作者： Jiang, Shanshan;Li, Kunfeng;Lin, Lin;Zheng, Hongying;Chen, Jianping;Jiang, Shanshan;Lu, Yuwen;Li, Kunfeng;Yan, Fei;Chen, Jianping

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关键词： HSP70;interaction;Rice stripe virus;viral replication

期刊名称：MOLECULAR PLANT PATHOLOGY （ 影响因子：5.663； 五年影响因子：5.626 ）

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收录情况： SCI

摘要： Heat shock proteins 70 (HSP70s) are a highly conserved family of genes in eukaryotes, and are involved in a remarkable variety of cellular processes. In many plant positive-stranded RNA viruses, HSP70 participates in the construction of a viral replication complex and plays various roles during viral infection. Here, we found increased expression of HSP70 following infection by Rice stripe virus (RSV), a negative-stranded RNA virus, in both rice (the natural host) and Nicotiana benthamiana (an experimental host). Heat treatment of N.benthamiana (Nb) plants enhanced viral infection, whereas RSV infection was retarded and viral RNAs accumulated at a low level when HSP70 was silenced. In both bimolecular fluorescence complement and invitro pull-down assays, the N-terminus of RSV RNA-dependent RNA polymerase (RdRp) interacted and co-localized with the HSP70s of both plants (OsHSP70 and NbHSP70). The localization of the N-terminus of RdRp when expressed alone was not obviously different from when it was co-expressed with OsHSP or NbHSP, and vice versa. RSV infection also had no effect on the localization of host HSP70. These results demonstrate that host HSP70 is necessary for RSV infection and probably plays a role in viral replication by interacting with viral RdRp, which provides the first evidence of an interacting host protein related to RSV replication, which has been little studied to date.

分类号： Q94

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