MD Simulations Revealing Special Activation Mechanism of Cannabinoid Receptor 1

Frontiers in Molecular Biosciences

Xuanxuan Li¹  Haiguang Liu¹  Tian Hua²  Zhi-Jie Liu²  Suwen Zhao²  Yiran Wu³ 

[1] Complex Systems Division, Beijing Computational Science Research Center, Beijing, China;School of Life Science and Technology, ShanghaiTech University, Shanghai, China;iHuman Institute, ShanghaiTech University, Shanghai, China;

关键词: cannabinoid receptor;    CB1;    molecular dynamics simulations;    G protein-coupled receptor;    activation mechanism;    MD;   

DOI  :  10.3389/fmolb.2022.860035

来源: DOAJ

【 摘 要 】

Cannabinoid receptor 1 (CB1) is a G protein-coupled receptor (GPCR) that is gaining much interest for its regulating role in the central nervous system and its value as a drug target. Structures of CB1 in inactive and active states have revealed conformational change details that are not common in other GPCRs. Here, we performed molecular dynamics simulations of CB1 in different ligand binding states and with mutations to reveal its activation mechanism. The conformational change of the “twin toggle switch” residues F2003.36 and W3566.48 that correlates with ligand efficacy is identified as a key barrier step in CB1 activation. Similar conformational change of residues 3.36/6.48 is also observed in melanocortin receptor 4, showing this “twin toggle switch” residue pair is crucial for the activation of multiple GPCR members.

【 授权许可】

Unknown