2y03

TURKEY BETA1 ADRENERGIC RECEPTOR WITH STABILISING MUTATIONS AND BOUND AGONIST ISOPRENALINE

spinqualitylabelsall models 2y03, resolution 2.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2y03 is a 2 chain structure with sequence from Melga. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 2CV, 5FW, NA, Y01 Related: 1dep, 2vt4, 2y01, 2y04, 2y00, 2y02 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [ADRB1_MELGA] Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. This receptor binds epinephrine and norepinephrine with approximately equal affinity. Publication Abstract from PubMed beta-adrenergic receptors (betaARs) are G-protein-coupled receptors (GPCRs) that activate intracellular G proteins upon binding catecholamine agonist ligands such as adrenaline and noradrenaline. Synthetic ligands have been developed that either activate or inhibit betaARs for the treatment of asthma, hypertension or cardiac dysfunction. These ligands are classified as either full agonists, partial agonists or antagonists, depending on whether the cellular response is similar to that of the native ligand, reduced or inhibited, respectively. However, the structural basis for these different ligand efficacies is unknown. Here we present four crystal structures of the thermostabilized turkey (Meleagris gallopavo) beta(1)-adrenergic receptor (beta(1)AR-m23) bound to the full agonists carmoterol and isoprenaline and the partial agonists salbutamol and dobutamine. In each case, agonist binding induces a 1 A contraction of the catecholamine-binding pocket relative to the antagonist bound receptor. Full agonists can form hydrogen bonds with two conserved serine residues in transmembrane helix 5 (Ser(5.42) and Ser(5.46)), but partial agonists only interact with Ser(5.42) (superscripts refer to Ballesteros-Weinstein numbering). The structures provide an understanding of the pharmacological differences between different ligand classes, illuminating how GPCRs function and providing a solid foundation for the structure-based design of novel ligands with predictable efficacies. The structural basis for agonist and partial agonist action on a beta(1)-adrenergic receptor.,Warne T, Moukhametzianov R, Baker JG, Nehme R, Edwards PC, Leslie AG, Schertler GF, Tate CG Nature. 2011 Jan 13;469(7329):241-4. PMID:21228877 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Adrenergic receptor 3D structures

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