在膜表面的Myr-Arf1形状灵活性揭示了与ArfGAP ASAP1的相互作用
Yue Zhang1,2, Olivier Soubias1, Shashank Pant3,4
1Center for Structural Biology, Center for Cancer Research, National Cancer Institute, Frederick, MD, 21702-1201, USA.
Nature communications
|November 21, 2023
概括
当ADP-ribosylation factor 1 (Arf1) 附着在细胞膜上时,它会动态地改变其形状,从而影响其相互作用和细胞功能. 了解这种形状灵活性是Arf1的关键.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物物理学 分子生物物理学
- 结构生物学 结构生物学
背景情况:
- ADP-ribosylation factor 1 (Arf1) 对于调节细胞内运输,器官结构和行为动力学至关重要.
- Arf1的功能是通过与细胞伙伴和细胞膜的相互作用来调节的.
- 了解膜结合的Arf1的结构状态对于阐明其多样化的细胞作用至关重要.
研究的目的:
- 为了定义活跃的,膜结合的Arf1.1.的动态构造景观.
- 研究Arf1的构造如何影响其与效应蛋白的相互作用.
- 了解Arf1动态行为的功能影响.
主要方法:
- 核磁共振 (NMR) 光谱学.核磁共振 (NMR) 光谱学.
- 中子反射计 (NR). 中子反射计 (NR).
- 分子动力学 (MD) 模拟.
主要成果:
- Arf1通过其N端的myristoylated螺旋固定在膜上.
- Arf1 G 域表现出显著的结构灵活性,存在于膜相关和膜距离状态之间的动态平衡.
- 这种形状的可塑性为效应器相互作用暴露了不同的接口.
结论:
- Arf1的结构动力学是其功能不可或缺的一部分.
- 绑定到ArfGAPs,例如ASAP1,可以限制Arf1的运动,将其"锁定"到特定的形状中.
- 这些受调节的构造变化对于调解Arf1的多样化的细胞活动至关重要.
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