非诺多泮
变构调节
兴奋剂
多巴胺
受体
多巴胺受体
化学
结合位点
配体(生物化学)
生物物理学
细胞内
神经科学
细胞生物学
生物
生物化学
作者
Xiao Teng,Sijia Chen,Yingying Nie,Peng Xiao,Xiao Yu,Zhenhua Shao,Sanduo Zheng
标识
DOI:10.1038/s41467-022-30929-w
摘要
Abstract Dopamine receptors are widely distributed in the central nervous system and are important therapeutic targets for treatment of various psychiatric and neurological diseases. Here, we report three cryo-electron microscopy structures of the D1 dopamine receptor (D1R)-Gs complex bound to two agonists, fenoldopam and tavapadon, and a positive allosteric modulator LY3154207. The structure reveals unusual binding of two fenoldopam molecules, one to the orthosteric binding pocket (OBP) and the other to the extended binding pocket (EBP). In contrast, one elongated tavapadon molecule binds to D1R, extending from OBP to EBP. Moreover, LY3154207 stabilizes the second intracellular loop of D1R in an alpha helical conformation to efficiently engage the G protein. Through a combination of biochemical, biophysical and cellular assays, we further show that the broad conformation stabilized by two fenoldopam molecules and interaction between TM5 and the agonist are important for biased signaling of D1R.
科研通智能强力驱动
Strongly Powered by AbleSci AI