Molecular basis for kinin selectivity and activation of the human bradykinin receptors.

Bradykinin and kallidin are endogenous kinin peptide hormones that belong to the kallikrein-kinin system and are essential to the regulation of blood pressure, inflammation, coagulation and pain control. Des-Arg10-kallidin, the carboxy-terminal des-Arg metabolite of kallidin, and bradykinin selectively activate two G protein-coupled receptors, type 1 and type 2 bradykinin receptors (B1R and B2R), respectively. The hyperactivation of bradykinin receptors, termed 'bradykinin storm', is associated with pulmonary edema in COVID-19 patients, suggesting that bradykinin receptors are important targets for COVID-19 intervention. Here we report two G protein-coupled complex structures of human B1R and B2R bound to des-Arg10-kallidin and bradykinin, respectively. Combined with functional analysis, our structures reveal the mechanism of ligand selectivity and specific activation of the bradykinin receptor. These findings also provide a framework for guiding drug design targeting bradykinin receptors for the treatment of inflammation, cardiovascular disorders and COVID-19. © 2021. The Author(s), under exclusive licence to Springer Nature America, Inc.

Citation

Yu-Ling Yin, Chenyu Ye, Fulai Zhou, Jia Wang, Dehua Yang, Wanchao Yin, Ming-Wei Wang, H Eric Xu, Yi Jiang. Molecular basis for kinin selectivity and activation of the human bradykinin receptors. Nature structural & molecular biology. 2021 Sep;28(9):755-761

Mesh Tags

Substances

PMID: 34518695

search → result