两种中国草药衍生激动剂揭示了BRS3的不同激活模式
Jie Li1, Changyao Li2,3,4, Qingtong Zhou5
1Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.
我们确定了与两个天然化合物结合的炸弹酶受体亚型-3 (BRS3) 的结构. 这揭示了这些化合物如何激活BRS3,为开发新代谢疾病治疗提供了洞察力.
科学领域:
- 结构生物学是结构生物学.
- 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:
- 庞贝素受体亚型-3 (BRS3),一种G蛋白结合受体 (GPCR),对于调节能量平衡,葡萄糖代谢和胰岛素释放至关重要.
- 以前的研究利用合成配体来探索BRS3信号,但自然化合物的激活机制,特别是来自传统中医的激活机制,仍然在很大程度上是未知的.
研究的目的:
- 通过使用结构和功能分析,阐明自然化合物激活BRS3的分子基础.
- 为开发用于治疗应用的新型BRS3调节器提供见解.
主要方法:
- 高分辨率冷电子显微镜 (cryo-EM) 用于确定人类BRS3-Gq复合物的结构.
- 生物化学测定,包括调动和内醇酸1 (IP1) 积累,加上突变发生的研究.
主要成果:
- 确定了人类BRS3-Gq复合体在高分辨率 (2.8-2.9 Å) 的非结合和结合状态 (DSO-5a和奥里多宁) 的冷-EM结构.
- 在orthosteric口袋中观察到DSO-5a和oridonin的明显的联结模式.
- 突变和功能测试表明,这两种化合物对BRS3相互作用网络的不同参与,影响信号通路.
结论:
- 这项研究为自然化合物的BRS3激活提供了第一个高分辨率的结构洞察力.
- 研究结果揭示了DSO-5a和奥里多宁激活BRS3的独特机制,突出了它们独特的相互作用.
- 这些结构和功能数据对于设计针对代谢障碍的小分子BRS3调节器非常有价值.
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