7EIB

Cryo-EM structure of the type 1 bradykinin receptor in complex with the des-Arg10-kallidin and an Gq protein

Summary for 7EIB

• Entry DOI: 10.2210/pdb7eib/pdb
• EMDB information: 31145
• Descriptor: B1 bradykinin receptor, LYS-ARG-PRO-PRO-GLY-PHE-SER-PRO-PHE, G subunit q (Gi1-Gq chimeric), ... (5 entities in total)
• Functional Keywords: bradykinin receptors, kinin, gpcr, membrane protein
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 5
• Total formula weight: 161019.67

Authors

Yin, Y.,Jiang, Y. (deposition date: 2021-03-30, release date: 2021-10-13, Last modification date: 2025-07-02)

Primary citation

Yin, Y.L.,Ye, C.,Zhou, F.,Wang, J.,Yang, D.,Yin, W.,Wang, M.W.,Xu, H.E.,Jiang, Y.
Molecular basis for kinin selectivity and activation of the human bradykinin receptors.
Nat.Struct.Mol.Biol., 28:755-761, 2021

PubMed Abstract: 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-Arg-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-Arg-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.

PubMed: 34518695
DOI: 10.1038/s41594-021-00645-y

Experimental method

ELECTRON MICROSCOPY (3 Å)