植物激素蛋白网络的广泛信号整合
Melina Altmann1, Stefan Altmann1, Patricia A Rodriguez1
1Institute of Network Biology (INET), Helmholtz Center Munich, German Research Center for Environmental Health, Munich-Neuherberg, Germany.
Nature
|July 3, 2020
概括
这项研究绘制了Arabidopsis植物激素信号网络,揭示了整合激素通路的广泛蛋白质相互作用. 许多信号蛋白在多个路径中起作用,突出显示复杂的交叉声和热效应.
科学领域:
- 植物生物学
- 分子生物学
- 系统生物学
背景情况:
- 植物激素对于发育,应激反应和产量至关重要.
- 现有的知识集中在核心信号通道上,但缺乏对通道间整合的理解.
- 转录数据表明激素途径在很大程度上是排他性的,与观察到的遗传表型形成鲜明对比.
研究的目的:
- 创建一个系统级的Arabidopsis植物激素信号网络.
- 确定不同激素通路之间的信号整合媒介的蛋白质-蛋白质相互作用 (PPI).
- 探索植物激素网络中的新功能和交互点.
主要方法:
- 在Arabidopsis中对2000多个二进制PPI进行系统级地图的实验生成.
- 确定网络中的通道社区和潜在的交叉通话点.
- 在七种激素途径中对候选相互作用的功能验证.
主要成果:
- 一个高度相互连接的网络揭示了通道社区和数百个新的交叉点.
- 在84%的候选相互作用中,功能验证证实了74%的测试蛋白质的新作用.
- 大多数信号蛋白质被发现是多种激素通路中的类蛋白质.
- 数百个涉及激素受体的小分子依赖相互作用被确定,这表明非正规的信号传递.
结论:
- 蛋白与蛋白之间的相互作用是整合不同植物激素信号通路的核心.
- 显著的部分植物激素信号蛋白表现出多样性,以多种途径运作.
- 通过小分子介导的非转录和非正规的受体信号比以前更为普遍.
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