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细菌XopR通过与等离子体膜相关的透破坏了RIN4复杂介导的植物免疫力

Xinlu Zhu¹, Weibing Wang¹, Simou Sun²

¹School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore.

Developmental cell

|March 26, 2025

概括

细菌3型效应器 (T3E) 使用本质上混乱的区域来破坏植物免疫力. 这项研究揭示了T3E XopR如何在植物等离子膜上形成网络,破坏免疫综合体并减少防御反应.

科学领域:

植物与微生物的相互作用
分子植物病理学分子植物病理学
细胞微生物学细胞微生物学

背景情况:

植物病原菌利用3型效应体 (T3E) 抑制植物免疫力.
T3E通常包含对功能至关重要的内在无序区域 (IDR),但它们在破坏植物防御中的作用尚未完全理解.
植物免疫受体,如RPM1相互作用蛋白4 (RIN4) 复合体,是细菌效应物的关键目标.

研究的目的:

阐明T3E XopR利用其IDRs操纵植物免疫复合物的机制.
研究宏分子凝聚在XopR和RIN4-RPM1免疫复合体之间的相互作用中的作用.
了解XopR如何破坏在等离子体膜上的植物防御信号.

主要方法:

使用生物物理技术研究了XopR在植物等离子体膜上的行为.
分析了XopR介导的大分子凝聚物的形成.
研究了XopR对Arabidopsis中的RIN4酸化和RPM1-激活防御的影响.
研究了XopR,RIN4和RPM1相互作用蛋白激酶 (RIPK) 之间的相互作用.

主要成果:

通过透集群和跨度,XopR在植物等离子体膜上形成了动态的时空网络.
这些XopR网络有效地操纵植物表面的免疫调节器,包括RIN4-RPM1复合体.
XopR破坏了RIN4-RPM1凝聚物,导致RIN4酸化减少,植物防御能力下降.
XopR通过RIPK破坏RIN4酸化,这是RPM1-介导免疫的一个关键步骤.

结论:

植物等离子膜相关的宏分子凝结是T3E功能的一个关键机制.
T3E XopR通过形成破坏RIN4-RPM1免疫综合体并抑制防御信号的网络来颠覆植物免疫力.
这项研究揭示了细菌利用一种新的策略,通过效应器驱动的凝结物调制来克服植物防御.

关键词:

欧洲资本贸易协会 (ETI)在RIN4中,使用RIN4.RPM1 RPM1 的使用方法在XopR中使用XopR.分子凝结的分子凝结.透的透是一种透.阶段分离的阶段分离.植物免疫力植物免疫力植物与微生物的相互作用

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