Download MendeleyStructure of GPR101-Gs enables identification of ligands with rejuvenating potential.
Yang, Z., Wang, J.Y., Yang, F., Zhu, K.K., Wang, G.P., Guan, Y., Ning, S.L., Lu, Y., Li, Y., Zhang, C., Zheng, Y., Zhou, S.H., Wang, X.W., Wang, M.W., Xiao, P., Yi, F., Zhang, C., Zhang, P.J., Xu, F., Liu, B.H., Zhang, H., Yu, X., Gao, N., Sun, J.P.(2024) Nat Chem Biol 20: 484-492
- PubMed: 37945893
- DOI: https://doi.org/10.1038/s41589-023-01456-6
- Primary Citation of Related Structures:
8W8Q, 8W8R, 8W8S - PubMed Abstract:
GPR101 is an orphan G protein-coupled receptor actively participating in energy homeostasis. Here we report the cryo-electron microscopy structure of GPR101 constitutively coupled to Gs heterotrimer, which reveals unique features of GPR101, including the interaction of extracellular loop 2 within the 7TM bundle, a hydrophobic chain packing-mediated activation mechanism and the structural basis of disease-related mutants. Importantly, a side pocket is identified in GPR101 that facilitates in silico screening to identify four small-molecule agonists, including AA-14. The structure of AA-14-GPR101-Gs provides direct evidence of the AA-14 binding at the side pocket. Functionally, AA-14 partially restores the functions of GH/IGF-1 axis and exhibits several rejuvenating effects in wild-type mice, which are abrogated in Gpr101-deficient mice. In summary, we provide a structural basis for the constitutive activity of GPR101. The structure-facilitated identification of GPR101 agonists and functional analysis suggest that targeting this orphan receptor has rejuvenating potential.
Organizational Affiliation:
NHC Key Laboratory of Otorhinolaryngology, Qilu Hospital of Shandong University, and Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
