Deshpande DA, Penn RB. A cryptic mode of GPCR regulation revealed.
Trends Mol Med 2022;
28:900-901. [PMID:
36109317 DOI:
10.1016/j.molmed.2022.08.011]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 12/24/2022]
Abstract
Over three decades of research have provided thorough insights into G protein-coupled receptor (GPCR) regulation. In a recent issue of Molecular Cell, Fonseca et al. identified a previously overlooked desensitization mechanism. Agonist activation of the β2-adrenoceptor (β2AR) causes its S-nitrosylation that is required for the receptor to internalize and desensitize. Eliminating β2AR S-nitrosylation by mutation of C265 augments β2AR protein kinase A signaling, enables β2AR nitric oxide (NO) signaling, renders mice resistant to bronchoconstriction, and protects mice from allergen-induced asthma.
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