5zk3

Crystal structure of rationally thermostabilized M2 muscarinic acetylcholine receptor bound with QNB

spinqualitylabelsall models 5zk3, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5zk3 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.6Å Ligands: QNB Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease ACM2_HUMAN Disease susceptibility is associated with variations affecting the gene represented in this entry. Function C562_ECOLX Electron-transport protein of unknown function.ACM2_HUMAN The muscarinic acetylcholine receptor mediates various cellular responses, including inhibition of adenylate cyclase, breakdown of phosphoinositides and modulation of potassium channels through the action of G proteins. Primary transducing effect is adenylate cyclase inhibition. Publication Abstract from PubMed Human muscarinic receptor M2 is one of the five subtypes of muscarinic receptors belonging to the family of G-protein-coupled receptors. Muscarinic receptors are targets for multiple neurodegenerative diseases. The challenge has been designing subtype-selective ligands against one of the five muscarinic receptors. We report high-resolution structures of a thermostabilized mutant M2 receptor bound to a subtype-selective antagonist AF-DX 384 and a nonselective antagonist NMS. The thermostabilizing mutation S110R in M2 was predicted using a theoretical strategy previously developed in our group. Comparison of the crystal structures and pharmacological properties of the M2 receptor shows that the Arg in the S110R mutant mimics the stabilizing role of the sodium cation, which is known to allosterically stabilize inactive state(s) of class A GPCRs. Molecular dynamics simulations reveal that tightening of the ligand-residue contacts in M2 receptors compared to M3 receptors leads to subtype selectivity of AF-DX 384. Structural insights into the subtype-selective antagonist binding to the M2 muscarinic receptor.,Suno R, Lee S, Maeda S, Yasuda S, Yamashita K, Hirata K, Horita S, Tawaramoto MS, Tsujimoto H, Murata T, Kinoshita M, Yamamoto M, Kobilka BK, Vaidehi N, Iwata S, Kobayashi T Nat Chem Biol. 2018 Dec;14(12):1150-1158. doi: 10.1038/s41589-018-0152-y. Epub, 2018 Nov 12. PMID:30420692 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Muscarinic acetylcholine receptor

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