一个G蛋白结合受体由全药物调节的结构基础
Ron O Dror1, Hillary F Green, Celine Valant
11] D. E. Shaw Research, 120 West 45th Street, 39th Floor, New York, New York 10036, USA [2].
Nature
|October 15, 2013
概括
研究人员使用原子模拟确定了G蛋白结合受体 (GPCR) 基调节器的结合部位和机制. 这为设计针对GPCRs的新药提供了结构基础,比如M2肌肉酸乙胆受体.
科学领域:
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
- 计算生物学 计算生物学
背景情况:
- 设计G蛋白结合受体 (GPCR) 质调节器是具有挑战性的,因为未知的结合方式和机制.
- 阿洛斯特基调制剂为制药研究提供了一个有前途的途径,针对受体而不是直接与内源性配体竞争.
研究的目的:
- 确定所有调节剂与M2肌肉酸乙胆受体 (M2受体) 的结合位,构造和相互作用.
- 阐明潜在的积极和消极全调节的分子机制.
- 为新型GPCR全调节器的合理设计提供结构基础.
主要方法:
- 原子级分子模拟观察自发调节器与M2受体的关联.
- 确定结合点,结合形状和特定的药物受体相互作用.
- 模拟的结合模式的验证,使用对工程受体突变的放射性连接体结合实验.
主要成果:
- 尽管结构多样化,但基调制剂通过-π相互作用与M2受体细胞外前庭中的芳香残留集群结合.
- 模拟揭示了全位调节的机制,包括结合的形状变化和 орто位和全位之间的静电相互作用.
- 实验验证证证实了模拟的结合模式及其对调节器亲和力的影响.
结论:
- 这项研究为M2受体全调节器的结合和机制提供了第一个原子水平的结构洞察.
- 这些发现使得化学修饰的合理设计能够微调化效应.
- 已确定的原则可以指导M2受体和其他GPCRs的全调节器的开发.
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