G蛋白结合受体CMKLR1激活和信号传递的结构基础由化学素衍生激素激活剂诱导
Xuan Zhang1, Tina Weiß2, Mary Hongying Cheng3,4
1Department of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America.
研究人员阐明了化学素受体1 (CMKLR1) 信号复合体的结构. 这一发现促进了对CMKLR1的理解.
科学领域:
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
- 生物化学 生物化学
背景情况:
- 化学类受体1 (CMKLR1),也称为化学受体23,是一种G蛋白合受体 (GPCR),表达在先天免疫细胞中.
- CMKLR1的信号传递影响了亲和抗炎反应,使其成为治疗干预的关键目标.
- 化学素,一种阿迪波金,是CMKLR1的主要连接体,调解各种细胞功能.
研究的目的:
- 为了确定CMKLR1-Gi信号复合体的高分辨率冷电子显微镜 (cryo-EM) 结构.
- 阐明CMKLR1被其激动剂chemerin9.1激活的基础分子机制.
- 为开发新型CMKLR1向治疗提供结构基础.
主要方法:
- 高分辨率冷电子显微镜 (cryo-EM) 用于确定CMKLR1-Gi-chemerin9复合物的结构.
- 分子动力学模拟用于分析受体-连接体相互作用和构造变化.
- 变异性研究以验证参与信号传递的关键氨基酸残留物.
主要成果:
- 确定了CMKLR1-Gi信号复合体与chemerin9激动剂的高分辨率冷EM结构.
- 结构揭示了连接体结合口袋中的关键相互作用和激动剂诱导的构造变化.
- 分子动力学和突变发生的数据阐明了CMKLR1激活的分子基础.
结论:
- 确定的结构为CMKLR1信号机制提供了前所未有的洞察力.
- 了解这些分子相互作用有助于设计小分子激动剂.
- 这项研究为开发促进炎症缓解的疗法铺平了道路,通过准CMKLR1.
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