Pooput C, Rosemond E, Karpiak J, Deflorian F, Vilar S, Costanzi S, Wess J, Kirk KL. Structural basis of the selectivity of the beta(2)-adrenergic receptor for fluorinated catecholamines.
Bioorg Med Chem 2009;
17:7987-92. [PMID:
19857969 DOI:
10.1016/j.bmc.2009.10.015]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Revised: 10/06/2009] [Accepted: 10/07/2009] [Indexed: 11/25/2022]
Abstract
The important and diverse biological functions of adrenergic receptors, a subclass of G protein-coupled receptors (GPCRs), have made the search for compounds that selectively stimulate or inhibit the activity of different adrenergic receptor subtypes an important area of medicinal chemistry. We previously synthesized 2-, 5-, and 6-fluoronorepinehprine (FNE) and 2-, 5-, and 6-fluoroepinephrine (FEPI) and found that 2FNE and 2FEPI were selective beta-adrenergic agonists and that 6FNE and 6FEPI were selective alpha-adrenergic agonists, while 5FNE and 5FEPI were unselective. Agonist potencies correlated well with receptor binding affinities. Here, through a combination of molecular modeling and site-directed mutagenesis, we have identified N293 in the beta(2)-adrenergic receptor as a crucial residue for the selectivity of the receptor for catecholamines fluorinated at different positions.
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