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A plant RNA virus inhibits NPR1 sumoylation and subverts NPR1-mediated plant immunity.

ABSTRACT: NONEXPRESSER OF PATHOGENESIS-RELATED GENES 1 (NPR1) is the master regulator of salicylic acid-mediated basal and systemic acquired resistance in plants. Here, we report that NPR1 plays a pivotal role in restricting compatible infection by turnip mosaic virus, a member of the largest plant RNA virus genus Potyvirus, and that such resistance is counteracted by NUCLEAR INCLUSION B (NIb), the viral RNA-dependent RNA polymerase. We demonstrate that NIb binds to the SUMO-interacting motif 3 (SIM3) of NPR1 to prevent SUMO3 interaction and sumoylation, while sumoylation of NIb by SUMO3 is not essential but can intensify the NIb-NPR1 interaction. We discover that the interaction also impedes the phosphorylation of NPR1 at Ser11/Ser15. Moreover, we show that targeting NPR1 SIM3 is a conserved ability of NIb from diverse potyviruses. These data reveal a molecular "arms race" by which potyviruses deploy NIb to suppress NPR1-mediated resistance through disrupting NPR1 sumoylation.

SUBMITTER: Liu J

PROVIDER: S-EPMC10275998 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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A plant RNA virus inhibits NPR1 sumoylation and subverts NPR1-mediated plant immunity.

Liu Jiahui J Wu Xiaoyun X Fang Yue Y Liu Ye Y Bello Esther Oreofe EO Li Yong Y Xiong Ruyi R Li Yinzi Y Fu Zheng Qing ZQ Wang Aiming A Cheng Xiaofei X

Nature communications 20230616 1

NONEXPRESSER OF PATHOGENESIS-RELATED GENES 1 (NPR1) is the master regulator of salicylic acid-mediated basal and systemic acquired resistance in plants. Here, we report that NPR1 plays a pivotal role in restricting compatible infection by turnip mosaic virus, a member of the largest plant RNA virus genus Potyvirus, and that such resistance is counteracted by NUCLEAR INCLUSION B (NIb), the viral RNA-dependent RNA polymerase. We demonstrate that NIb binds to the SUMO-interacting motif 3 (SIM3) of ...[more]

PMID: 37328517

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Dataset Information

A plant RNA virus inhibits NPR1 sumoylation and subverts NPR1-mediated plant immunity.

Publications

A plant RNA virus inhibits NPR1 sumoylation and subverts NPR1-mediated plant immunity.

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