The RNA-Dependent RNA Polymerase NIb of Potyviruses Plays Multifunctional, Contrasting Roles during Viral Infection
文献类型： 外文期刊
作者： Shen, Wentao 1 ; Shi, Yan 3 ; Dai, Zhaoji 4 ; Wang, Aiming 4 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Minist Agr, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China
3.Henan Agr Univ, Coll Plant Protect, Zhengzhou 450002, Peoples R China
4.Agr & Agri Food Canada, London Res & Dev Ctr, 1391 Sandford ST, London, ON N5V 4T3, Canada
5.Univ Western Ontario, Dept Biol, 1151 Richmond ST N, London, ON N6A 5B7, Canada
关键词： Potyvirus; NIb; RNA-dependent RNA polymerase; virus-host interaction; autophagy; sumoylation; NPR1
期刊名称：VIRUSES-BASEL （ 影响因子：5.048； 五年影响因子：5.127 ）
ISSN：
年卷期： 2020 年 12 卷 1 期
页码：
收录情况： SCI
摘要： Potyviruses represent the largest group of known plant RNA viruses and include many agriculturally important viruses, such as Plum pox virus, Soybean mosaic virus, Turnip mosaic virus, and Potato virus Y. Potyviruses adopt polyprotein processing as their genome expression strategy. Among the 11 known viral proteins, the nuclear inclusion protein b (NIb) is the RNA-dependent RNA polymerase responsible for viral genome replication. Beyond its principal role as an RNA replicase, NIb has been shown to play key roles in diverse virus-host interactions. NIb recruits several host proteins into the viral replication complexes (VRCs), which are essential for the formation of functional VRCs for virus multiplication, and interacts with the sumoylation pathway proteins to suppress NPR1-mediated immunity response. On the other hand, NIb serves as a target of selective autophagy as well as an elicitor of effector-triggered immunity, resulting in attenuated virus infection. These contrasting roles of NIb provide an excellent example of the complex co-evolutionary arms race between plant hosts and potyviruses. This review highlights the current knowledge about the multifunctional roles of NIb in potyvirus infection, and discusses future research directions.
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