GPCR介导的阿里斯激活的分子机制
Naomi R Latorraca1,2,3,4, Jason K Wang2, Brian Bauer5
1Biophysics Program, Stanford University, Stanford, CA, USA.
Nature
|May 4, 2018
概括
发现G蛋白结合受体 (GPCR) 如何激活阿斯特林是药物设计的关键. 这项研究揭示了受体核心和尾部独立激活阿斯特林,为偏向的GPCR配体发展提供了新的见解.
科学领域:
- 结构生物学
- 分子药理学
- 生物物理
背景情况:
- G蛋白结合受体 (GPCR) 是重要的药物标.
- 选择性调节阿斯特林信号是药物发现的关键目标.
- 通过受体激活阿斯特林的确切机制尚不清楚.
研究的目的:
- 阐明由GPCR激活阿雷斯的结构机制.
- 研究受体核心和尾部在阿雷斯激活中的不同作用.
- 为设计有偏见的GPCR配体提供结构基础.
主要方法:
- 广泛的原子级分子动力学模拟.
- 定位光光谱 (SDFS) 来确认发现.
- 在阿斯特林内对的分析.
主要成果:
- GPCR跨膜核心和细胞质尾部可以独立激活阿斯特林.
- 受体核的作用通过与细胞内循环和阿雷斯体的相互作用进行介导.
- 即使没有受体,阿雷斯也可以采用活性构造,与C-终端尾部脱有关.
结论:
- 不同的GPCR结合模式可能导致阿斯特林激活.
- 这些发现揭示了一种与先前的模型不同,用于激活阿雷斯的新机制.
- 这种结构理解有助于合理设计具有功能选择性的GPCR向药物.
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