具有分歧偏差的 ангиотензин类似物稳定了不同的受体构造
Laura M Wingler1, Matthias Elgeti2, Daniel Hilger3
1Department of Medicine and Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC 27710, USA.
Cell
|January 15, 2019
概括
偏差型G蛋白结合受体 (GPCR) 激动剂表现出明显的结构变化. 这项研究揭示了不同的配体如何稳定特定的受体构造,有助于向GPCR药物的设计.
科学领域:
- 药理学
- 生物化学
- 结构生物学
背景情况:
- G蛋白结合受体 (GPCR) 是重要的药物标.
- 偏差激素可以激活特定的信号通路 (G蛋白或β-arrestin).
- 了解体诱导的形状变化是药物设计的关键.
研究的目的:
- 调查偏向的配体如何改变血管激素II型I受体 (AT1R) 的构造格局.
- 将特定的受体形状与偏差信号结果相关联.
- 提供针对GPCR的合理药物设计的结构基础.
主要方法:
- 使用双电子共振 (DEER) 光谱.
- 在AT1R上使用氧化物探针定位旋转标记.
- 监测细胞内区域间的旋转距离,以绘制构造状态.
主要成果:
- 确定了AT1R的四个不同的构造状态.
- 证明不同的功能类型的连接体稳定独特的形状分布.
- Gq偏差的激动剂稳定了"开放"的形状,而β-arrestin偏差的激动剂则有利于"封闭"的形状.
结论:
- 在AT1R的带偏差在结构上编码在不同的受体构造中.
- 德尔光谱有效地绘制了GPCR的结构动态.
- 这些发现使GPCR向药物的合理设计具有提高的特异性.
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