文献类型： 外文期刊
作者： Xiong, Ruyi 1 ; Wu, Jianxiang 1 ; Zhou, Yijun 2 ; Zhou, Xueping 1 ;
作者机构： 1.Zhejiang Univ, Inst Biotechnol, State Key Lab Rice Biol, Hangzhou 310029, Zhejiang, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Peoples R China
期刊名称：JOURNAL OF VIROLOGY （ 影响因子：5.103； 五年影响因子：5.078 ）
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收录情况： SCI
摘要： Rice stripe virus (RSV) is the type member of the genus Tenuivirus. RSV has four single-stranded RNAs and causes severe disease in rice fields in different parts of China. To date, no reports have described how RSV spreads within host plants or the viral and/or host factor(s) required for tenuivirus movement. We investigated functions of six RSV-encoded proteins using trans-complementation experiments and biolistic bombardment. We demonstrate that NSvc4, encoded by RSV RNA4, supports the intercellular trafficking of a movement-deficient Potato virus X in Nicotiana benthamiana leaves. We also determined that upon biolistic bombardment or agroinfiltration, NSvc4:enhanced green fluorescent protein (eGFP) fusion proteins localize predominantly near or within the walls of onion and tobacco epidermal cells. In addition, the NSvc4:eGFP fusion protein can move from initially bombarded cells to neighboring cells in Nicotiana benthamiana leaves. Immunocytochemistry using tissue sections from RSV-infected rice leaves and an RSV NSvc4-specific antibody showed that the NSvc4 protein accumulated in walls of RSV-infected leaf cells. Gel retardation assays revealed that the NSvc4 protein interacts with single-stranded RNA in vitro, a common feature of many reported plant viral movement proteins (MPs). RSV NSvc4 failed to interact with the RSV nucleocapsid protein using yeast two-hybrid assays. Taken together, our data indicate that RSV NSvc4 is likely an MP of the virus. This is the first report describing a tenuivirus MP.
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