National Health and Medical Research Council (NHMRC, Australia)
1061044
Australia
National Health and Medical Research Council (NHMRC, Australia)
1120919
Australia
National Health and Medical Research Council (NHMRC, Australia)
1065410
Australia
National Health and Medical Research Council (NHMRC, Australia)
1055134
Australia
National Health and Medical Research Council (NHMRC, Australia)
1126857
Australia
Citation
Journal: Nature / Year: 2020 Title: Activation of the GLP-1 receptor by a non-peptidic agonist. Authors: Peishen Zhao / Yi-Lynn Liang / Matthew J Belousoff / Giuseppe Deganutti / Madeleine M Fletcher / Francis S Willard / Michael G Bell / Michael E Christe / Kyle W Sloop / Asuka Inoue / Tin T ...Authors: Peishen Zhao / Yi-Lynn Liang / Matthew J Belousoff / Giuseppe Deganutti / Madeleine M Fletcher / Francis S Willard / Michael G Bell / Michael E Christe / Kyle W Sloop / Asuka Inoue / Tin T Truong / Lachlan Clydesdale / Sebastian G B Furness / Arthur Christopoulos / Ming-Wei Wang / Laurence J Miller / Christopher A Reynolds / Radostin Danev / Patrick M Sexton / Denise Wootten / Abstract: Class B G-protein-coupled receptors are major targets for the treatment of chronic diseases, including diabetes and obesity. Structures of active receptors reveal peptide agonists engage deep within ...Class B G-protein-coupled receptors are major targets for the treatment of chronic diseases, including diabetes and obesity. Structures of active receptors reveal peptide agonists engage deep within the receptor core, leading to an outward movement of extracellular loop 3 and the tops of transmembrane helices 6 and 7, an inward movement of transmembrane helix 1, reorganization of extracellular loop 2 and outward movement of the intracellular side of transmembrane helix 6, resulting in G-protein interaction and activation. Here we solved the structure of a non-peptide agonist, TT-OAD2, bound to the glucagon-like peptide-1 (GLP-1) receptor. Our structure identified an unpredicted non-peptide agonist-binding pocket in which reorganization of extracellular loop 3 and transmembrane helices 6 and 7 manifests independently of direct ligand interaction within the deep transmembrane domain pocket. TT-OAD2 exhibits biased agonism, and kinetics of G-protein activation and signalling that are distinct from peptide agonists. Within the structure, TT-OAD2 protrudes beyond the receptor core to interact with the lipid or detergent, providing an explanation for the distinct activation kinetics that may contribute to the clinical efficacy of this compound series. This work alters our understanding of the events that drive the activation of class B receptors.
History
Deposition
May 1, 2019
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Header (metadata) release
Jul 24, 2019
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Map release
Jan 8, 2020
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Update
Nov 25, 2020
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Current status
Nov 25, 2020
Processing site: RCSB / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
EMPIAR-10346 (Title: Cryo-EM of GLP-1 receptor bound to TT-OAD2 non-peptidic agonist Data size: 6.2 TB Data #1: Unaligned multi-frame movies of GLP-1R-TT-OAD2 complex [micrographs - multiframe] Data #2: Unaligned multi-frame movies of GLP-1R-TT-OAD2 complex [micrographs - multiframe])
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