对激素受体的病原体干扰的NLR监测会诱导免疫力
Jing Chen1, Yanxiao Zhao1, Xuanjie Luo1
1Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China.
Nature
|December 14, 2022
概括
植物NLR蛋白检测破坏植物激素信号的病原体. 胡 Tsw 蛋白识别 TSWV NSs 效应器,该效应器针对 TCP21 抑制激素受体,从而激活植物免疫力.
科学领域:
- 植物免疫力
- 植物激素信号
- 分子植物病原体相互作用
背景情况:
- 植物激素的信号传递对于植物对病原体的防御至关重要.
- 病原体操纵植物激素通路以促进毒性.
- 对病原体干扰荷尔蒙信号的植物监测是不太了解的.
研究的目的:
- 研究植物天生的免疫系统如何监测病原体干扰植物激素信号.
- 阐明胡NLR Tsw识别TSWV效应器NSs的机制.
- 了解NSS如何操纵植物激素的信号通路.
主要方法:
- 结构建模以比较TSW LRR域与激素受体.
- 共同免疫沉试验用于研究蛋白质相互作用.
- 病毒诱导的基因沉默来评估TCP21的作用.
主要成果:
- 通过抑制剂TCP21与植物激素受体 (COI1,TIR1,MAX2) 相互作用.
- 它增强了NSs-TCP21受体的相互作用,阻断了激素介导的免疫力.
- NLR Tsw 与 TCP21 相互作用,这种相互作用由 NSs 增强,激活防御.
结论:
- 病原体效应器可以向TCP21等保存抑制剂,以破坏植物激素信号传递并促进毒性.
- 植物NLR蛋白已经进化到检测这种效应介导干扰,激活免疫力.
- 这项研究揭示了一种新的植物免疫监测机制,
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