3sn6

Crystal structure of the beta2 adrenergic receptor-Gs protein complex

spinqualitylabelsall models 3sn6, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3sn6 is a 5 chain structure with sequence from Bos taurus, Enterobacteria phage t4, Lama glama and Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: P0G Gene: GNAS, GNAS1 (Bos taurus), Gnb1 (Rattus norvegicus), GNG2 (Bos taurus), E, ADRB2, ADRB2R, B2AR (Enterobacteria phage T4) Activity: Lysozyme, with EC number 3.2.1.17 Resources: FirstGlance, OCA, RCSB, PDBsum Function [ADRB2_HUMAN] Beta-adrenergic receptors mediate the catecholamine-induced activation of adenylate cyclase through the action of G proteins. The beta-2-adrenergic receptor binds epinephrine with an approximately 30-fold greater affinity than it does norepinephrine. [GNAS2_BOVIN] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. The G(s) protein is involved in hormonal regulation of adenylate cyclase: it activates the cyclase in response to beta-adrenergic stimuli. [GBG2_BOVIN] Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction. [GBB1_RAT] Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction. Publication Abstract from PubMed G protein-coupled receptors (GPCRs) are responsible for the majority of cellular responses to hormones and neurotransmitters as well as the senses of sight, olfaction and taste. The paradigm of GPCR signalling is the activation of a heterotrimeric GTP binding protein (G protein) by an agonist-occupied receptor. The beta(2) adrenergic receptor (beta(2)AR) activation of Gs, the stimulatory G protein for adenylyl cyclase, has long been a model system for GPCR signalling. Here we present the crystal structure of the active state ternary complex composed of agonist-occupied monomeric beta(2)AR and nucleotide-free Gs heterotrimer. The principal interactions between the beta(2)AR and Gs involve the amino- and carboxy-terminal alpha-helices of Gs, with conformational changes propagating to the nucleotide-binding pocket. The largest conformational changes in the beta(2)AR include a 14 A outward movement at the cytoplasmic end of transmembrane segment 6 (TM6) and an alpha-helical extension of the cytoplasmic end of TM5. The most surprising observation is a major displacement of the alpha-helical domain of Galphas relative to the Ras-like GTPase domain. This crystal structure represents the first high-resolution view of transmembrane signalling by a GPCR. Crystal structure of the beta2 adrenergic receptor-Gs protein complex.,Rasmussen SG, DeVree BT, Zou Y, Kruse AC, Chung KY, Kobilka TS, Thian FS, Chae PS, Pardon E, Calinski D, Mathiesen JM, Shah ST, Lyons JA, Caffrey M, Gellman SH, Steyaert J, Skiniotis G, Weis WI, Sunahara RK, Kobilka BK Nature. 2011 Jul 19;477(7366):549-55. doi: 10.1038/nature10361. PMID:21772288 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Adrenergic receptor Antibody Beta-2 Adrenergic Receptor G protein-coupled receptor GTP-binding protein Guanine nucleotide-binding protein Hormone Lysozyme 3D structures Nobel Prizes for 3D Molecular Structure Suggestions for new articles Transducin User:Wayne Decatur/UNH BCHEM833 Structural Analysis Workshop Session Fall 2012 User:Wayne Decatur/UNH BCHEM833 Structural Proteomics Introductory Lecture Fall 2012

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