一个新的"激活开关"动机,所有氨基酶受体都有共同的动机
Kuo Hao Lee1, Jamie J Manning2,3,4, Jonathan Javitch2,3,4
1Computational Chemistry and Molecular Biophysics Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse─Intramural Research Program, National Institutes of Health, Baltimore, Maryland 21224, United States.
Journal of chemical information and modeling
|August 4, 2023
概括
氨基酶受体经历激活形状变化 (ACCs),独立于连接体结构. 一个新的"激活开关"图案涉及跨膜螺旋体3,5和6,整合了受体信号的关键元素.
科学领域:
- 结构生物学 结构生物学
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 氨基酶受体,一种G蛋白结合受体 (GPCRs) 的类别,调解细胞对生物氨基胺的反应.
- 激素结合启动通过G蛋白和β-arrestins的细胞内信号级联.
- 了解与激活相关的形状变化 (ACC) 对药物开发至关重要.
研究的目的:
- 为了识别氨基酶受体中的通用激活构造变化 (ACCs),独立于激剂支架.
- 研究受体激活时常见的细胞外和细胞内结构重组.
- 提出一种介导氨基酶受体激活的新型保存动机.
主要方法:
- 对可用的氨基酶受体结构进行全面的审查和分析.
- 在不同氨基酶受体亚型中对形状变化的比较分析.
- 识别与受体激活相关的保存结构元素和图案.
主要成果:
- 在跨膜螺旋体的细胞外端没有发现任何常见的ACC.
- 在联体结合口袋中的常见ACC与PIF动机和Trp6.48.8相关.
- 确定了一种新的"激活开关"动机,将PIF动机和Trp6.48集成到跨膜螺旋体3,5和6中.
结论:
- 氨基基受体激活涉及保守的结构重组,特别是涉及PIF动机和Trp6.48.8.
- 新提出的"激活开关"图案为不同亚型的氨基酶受体激活提供了一个统一的机制.
- 这些发现为GPCR信号传递和治疗干预的潜在目标提供了洞察力.
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