糖分非发酵1-相关蛋白激酶的调节 2.6 状态通过透硫和酸化:从分子动力学模拟的见解
Miaomiao Li1, Ting Wu1, Shuhan Wang1
1College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
International journal of molecular sciences
|July 29, 2023
概括
过硫化SNRK2.6 (糖非发酵1相关蛋白酶2.6) 通过削弱其与HAB1.1的相互作用来启动酸 (ABA) 信号传递. 然后,Ser267酸化通过稳定这种相互作用来停止信号传输.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 生物化学 生物化学
背景情况:
- 糖不发酵1相关蛋白酶2.6 (SnRK2.6) 在酸 (ABA) 信号传导途径中起到关键的分子开关作用.
- SnRK2.6通常存在于一个不活跃的状态.
- 走开了,走开了.
- 形成与蛋白质酸酶2Cs (PP2Cs) 类型2Cs (PP2Cs) 的复合体.
- 压力条件通过从PP2Cs释放SnRK2.6并酸化Ser175来激活SnRK2.6,从而启动ABA信号传递.
研究的目的:
- 阐明SnRK2.6.6的"开启"和"关闭"状态的微调调调节机制.
- 了解像硫化和酸化这样的翻译后修饰 (PTM) 如何控制ABA信号启动和停止.
主要方法:
- 利用分子动力学模拟来研究SnRK2.6和对ABA1 (HAB1) 过敏的相互作用.
- 分析了Cys131/137再硫化和Ser267酸化对SnRK2.6活性及其与HAB1.1复合形成的影响.
主要成果:
- 在Cys131/137的化使SnRK2.6-HAB1复合体不稳定,促进了ABA信号启动.
- 在化SnRK2.6中在Ser267的酸化稳定了HAB1的复合体,作为一种抑制机制.
- HAB1不能去化Ser267,这表明这种修改确保了ABA信号终止.
结论:
- 化和化作为SnRK2.6状态转换的关键调节者,微调ABA信号.
- 固硫化和酸化之间的相互作用提供了对ABA信号启动和制动的精确控制的见解.
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