用替代配体重新编程鞭毛素受体反应
Du-Hwa Lee1,2, Ho-Seok Lee3,4,5, Min-Soo Choi3
1Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, Vienna, Austria. duhwa.lee@boku.ac.at.
Nature communications
|November 12, 2024
概括
研究人员发现,FLAGELLIN-SENSING 2 (FLS2) 受体激酶可以与小分子相互作用,而不仅仅是其已知的联体. 这一发现揭示了植物免疫受体信号传递中的意想不到的灵活性.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物免疫力 植物免疫力
- 受体激酶的信号传递.
背景情况:
- 受体激酶 (RKs) 对于植物细胞过程至关重要,对各种外部信号作出反应.
- 单个植物RKs感知结构多样化的配体的能力在很大程度上是未知的.
- 弗拉格林感应2 (FLS2) 是一种具有良好的特征的RK,可以识别细菌的鞭毛素,以启动植物防御.
研究的目的:
- 为了研究植物RK是否可以处理来自不同类型的连接体的信号.
- 为了确定FLS2受体的新型配体.
- 用化学探针探索RKs的信号灵活性.
主要方法:
- 采用大规模的反向化学屏幕,测试了超过20,000个小分子与FLS2感觉领域的相互作用.
- 进行了功能性测试,以评估已识别的小分子对FLS2活性和下游反应的影响.
- 分析由这些新型相互作用触发的基因表达程序.
主要成果:
- 确定了两种小分子,它们以非典型的方式与FLS2受体相互作用.
- 这些代用配体弱激活FLS2,导致功能性抗菌反应.
- 小分子的激活诱导了不寻常的基因表达模式,与鞭毛素诱导的免疫不同.
结论:
- 像FLS2这样的单个植物RK表现出比以前理解的更高程度的联结灵活性.
- 与RKs的偏向性连接体相互作用可以揭示新的信号通路和细胞输出.
- 作为偏向联体的化学探针是剖析复杂RK信号转导的宝贵工具.
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