OsATL32可在任何地方化产生反应性氧物种的OsRac5-OsRbohB模块,以抑制大米免疫力
Yuqing Yan1,2,3, Hui Wang1,2,3, Yan Bi1,2,3
1National Key Laboratory for Rice Biology and Breeding, Institute of Biotechnology, Zhejiang University, Hangzhou, 310058, China.
Journal of integrative plant biology
|April 17, 2024
概括
米的免疫力依赖于蛋白质的降解. E3结合酶OsATL32通过降解关键免疫成分,对抗米爆和细菌爆的抗性产生负面影响,但其降解由酸酶促进,增强植物防御.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物病理学 植物病理学
- 生物化学 生物化学
背景情况:
- 在植物免疫力方面,以乌比基化为媒介的蛋白质降解至关重要.
- 在调节植物防御反应方面,E3泛素酶起着关键作用.
- 阿拉比多普西斯 (Arabidopsis Tóxicos En Levadura) (ATL) 家族包括参与各种细胞过程的E3链酶.
研究的目的:
- 为了研究OSATL32的功能,ATL类型的E3泛基因酶,在米免疫中.
- 阐明OSATL32在植物对病原体防御中的作用背后的调节网络和分子机制.
主要方法:
- 在米植物相互作用中的基因表达分析.
- 在病原体感染和基治疗下检测蛋白质水平.
- 生物化学测定和遗传研究以确定OsATL32的点和功能.
- 对反应性氧物种 (ROS) 积累的分析.
主要成果:
- 在Magnaporthe oryzae感染期间,OsATL32表达和蛋白质水平下降.
- OsATL32 负面调节了对大米爆发和细菌叶病的耐药性.
- OsATL32针对OsRac5-OsRbohB模块,抑制ROS积累,从而削弱免疫力.
- 酸盐和素同源促进OsATL32的降解,增强了米粉的防爆能力.
结论:
- OsATL32通过向ROS产生的组件,起到米免疫的负调节作用.
- 由蛋白酸酶促进的OsATL32的降解对于有效的植物防御M. oryzae.是必不可少的.
- 这项研究揭示了大米中E3酶介导的免疫抑制的新型机制.
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