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- W3032032492 abstract "Most drugs acting on G-protein-coupled receptors target the orthosteric binding pocket where the native hormone or neurotransmitter binds. There is much interest in finding allosteric ligands for these targets because they modulate physiologic signaling and promise to be more selective than orthosteric ligands. Here we describe a newly developed allosteric modulator of the β2-adrenergic receptor (β2AR), AS408, that binds to the membrane-facing surface of transmembrane segments 3 and 5, as revealed by X-ray crystallography. AS408 disrupts a water-mediated polar network involving E1223.41 and the backbone carbonyls of V2065.45 and S2075.46. The AS408 binding site is adjacent to a previously identified molecular switch for β2AR activation formed by I3.40, P5.50 and F6.44. The structure reveals how AS408 stabilizes the inactive conformation of this switch, thereby acting as a negative allosteric modulator for agonists and positive allosteric modulator for inverse agonists. A negative allosteric modulator of the G-protein-coupled receptor β2-adrenergic receptor binds to a membrane-facing surface adjacent to a molecular switch for receptor activation, and its binding disrupts a water-mediated polar network stabilizing an inactive switch conformation." @default.
- W3032032492 created "2020-06-05" @default.
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- W3032032492 date "2020-06-01" @default.
- W3032032492 modified "2023-10-17" @default.
- W3032032492 title "An allosteric modulator binds to a conformational hub in the β2 adrenergic receptor" @default.
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- W3032032492 doi "https://doi.org/10.1038/s41589-020-0549-2" @default.
- W3032032492 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7816728" @default.
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