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单分子分析显示,FLS2的酸化决定了它的时空动态和免疫力

Yaning Cui^1,2, Hongping Qian², Jinhuan Yin²

¹State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.

|July 24, 2024

概括

化Ser-938在阿拉比多普西斯FLAGELLIN-SENSITIVE2 (FLS2) 受体激酶中的化对于植物免疫是至关重要的. 这种修改调节了FLS2的动态,并增强了对鞭毛蛋白 (flg22) 感知的免疫反应.

科学领域:

植物免疫力植物免疫力
分子植物微生物相互作用.
受体激酶的信号传递.

背景情况:

FLAGELLIN-SENSITIVE2 (FLS2) 是Arabidopsis thaliana中的一个关键受体激酶,在识别鞭毛素 (flg22) 时启动植物防御通路.
在flg22识别后,在血膜上FLS2酸化的动态调节仍然不完全理解.
了解FLS2酸化对于阐明植物免疫反应的机制至关重要.

研究的目的:

调查FLS2酸化在Ser-938调节FLS2动态和功能的作用.
确定FLS2酸化如何影响其局部化到特定的膜纳米域.
为了阐明FLS2酸化对flg22诱导的免疫反应的贡献.

主要方法:

单粒子追踪用于分析FLS2的时空动态.
福斯特共振能量转移-光终身成像显微镜 (FRET-FLIM) 来评估蛋白质-蛋白质相互作用.
蛋白质近距离指数测试以量化与脂质标记物的共同定位.
对FLS2突变 (FLS2^S938D和FLS2^S938A) 的分析,以评估酸化的影响.

主要成果:

在FLS2中酸化Ser-938对其时空动力学和flg22处理后的寿命有显著影响.
在Ser-938的FLS2酸化增强了其与AtRem1.3-关联的纳米域的同定位,表明分类效率发生了变化.
酸化Ser-938促进flg22诱导的FLS2内部化,并加强植物免疫反应.

结论:

在Ser-938的FLS2酸化是植物免疫的关键调节机制.
酸化促进了FLS2分裂为AtRem1.3-关联的纳米域,从而激活flg22触发的免疫力.
这项研究弥合了FLS2酸化和FLS2介导免疫的激活之间的差距.

关键词:

A. 塔利安娜塔利安娜塔利安娜在AtRem1.3-关联的纳米域.细胞内分泌症 (endocytosis) 发生在细胞内.酸化的方法是:光化.植物生物学植物生物学一个分子分析分析.时间空间的动态.

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