人类β2上腺素受体逆agonists和对手的保留结合方式被X射线晶体学揭示
Daniel Wacker1, Gustavo Fenalti, Monica A Brown
1Department of Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|July 31, 2010
概括
对β2上腺素受体 (β2AR) 的结构研究显示,当它与不同的逆agonists和antagonists结合时,会发生轻微的局部变化. 这些发现有助于理解用于药物设计的配体相互作用.
科学领域:
- 结构生物学 结构生物学
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
背景情况:
- G蛋白结合受体 (GPCR) 是主要的药物点.
- 在GPCR家族中,β2上腺素受体 (β2AR) 被广泛研究.
- 之前的研究确定了具有部分逆agonists的β(2) AR结构,但连接体诱导的构造变化仍然不清楚.
研究的目的:
- 为了研究干诱导的形差异在beta(2) AR.
- 为了确定β(2) AR与ICI 118,551和alprenolol.complex的结晶结构.
- 了解多种类型的配体如何与β(2) AR结合部位相互作用.
主要方法:
- 使用X射线晶体学来确定工程β(2) AR结构的结构.
- 三种不同的配体与β(2) AR复杂化:ICI 118,551,一种新型化合物,和alprenolol.
- 进行了受体连接体交叉对接实验.
主要成果:
- 贝塔2AR的整体折叠在不同的连接体复合体中保持一致.
- 联体结合部位容纳了各种各样的化合物,只有微小的局部结构重组.
- 对所有连接体都观察到一个涉及氧胺动机的保留键网络.
结论:
- β(2) AR结合部位可以适应连接体的各种化学和药理性质.
- 一个单一的β(2) AR结构可能适用于对接一系列的抗剂和逆agonists.
- 额外的体受体结构可以增强体对接和药物设计优化.
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