在斯特里哥拉克信号发送中的D53-D3-D14复合体的形态动力学
Simiao Liu, Jia Wang1, Bin Song2
1Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
Plant & cell physiology
|June 29, 2023
概括
斯特里戈拉克顿通过D53-SKP1-D3-D14复合体来调节植物结构. 研究人员揭示了这个复杂的系统.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 斯特里戈拉克顿 (SLs) 是关键的植物激素,调节结构和作物产量.
- SL感知涉及DWARF14 (D14) 受体,D3和D53.3的复合体.
- 之前的结构研究集中在该综合体的部分部分,但整个全光复合体结构和组装机制尚不清楚.
研究的目的:
- 阐明D53-SKP1-D3-D14全息复合体形成的结构和动态机制.
- 了解D53灵活性在strigolactone信号感知中的作用.
- 为了提供一个完整的strigolactone信号综合体的结构模型.
主要方法:
- 包含D53,SKP1,D3和D14的全息复合物的复合用rac-GR24.
- 低温电子显微镜 (cryo-EM) 用于在D53.3的存在下确定SKP1-D3-D14复合物的结构.
- -交换质谱法 (HDX-MS) 用于分析动态形状变化和识别相互作用接口.
主要成果:
- 发现Apo-D53是灵活的,可以进行全息复杂的复合.
- 冷-EM结构没有显示出主要的形状变化,但在D14和AtD14之间旋转.
- 在复杂组装过程中,HDX-MS在D53 (N和D2域) 和动态图案中确定了两个潜在的相互作用接口.
结论:
- 建立了D53-SKP1-D3-D14全息复合物的动态模型.
- 这些发现提供了关于strigolactone感知和信号转导的生化和遗传机制的见解.
- 了解这个复合体对于工程植物架构和提高作物产量至关重要.
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