3p0g

Structure of a nanobody-stabilized active state of the beta2 adrenoceptor

spinqualitylabelsall models 3p0g, resolution 3.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3p0g is a 2 chain structure with sequence from Enterobacteria phage t4 and Lama glama. The April 2011 RCSB PDB Molecule of the Month feature on Nanobodies by David Goodsell is 10.2210/rcsb_pdb/mom_2011_4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: P0G Gene: ADRB2, ADRB2R, B2AR, E (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. Publication Abstract from PubMed G protein coupled receptors (GPCRs) exhibit a spectrum of functional behaviours in response to natural and synthetic ligands. Recent crystal structures provide insights into inactive states of several GPCRs. Efforts to obtain an agonist-bound active-state GPCR structure have proven difficult due to the inherent instability of this state in the absence of a G protein. We generated a camelid antibody fragment (nanobody) to the human beta(2) adrenergic receptor (beta(2)AR) that exhibits G protein-like behaviour, and obtained an agonist-bound, active-state crystal structure of the receptor-nanobody complex. Comparison with the inactive beta(2)AR structure reveals subtle changes in the binding pocket; however, these small changes are associated with an 11 A outward movement of the cytoplasmic end of transmembrane segment 6, and rearrangements of transmembrane segments 5 and 7 that are remarkably similar to those observed in opsin, an active form of rhodopsin. This structure provides insights into the process of agonist binding and activation. Structure of a nanobody-stabilized active state of the beta(2) adrenoceptor.,Rasmussen SG, Choi HJ, Fung JJ, Pardon E, Casarosa P, Chae PS, Devree BT, Rosenbaum DM, Thian FS, Kobilka TS, Schnapp A, Konetzki I, Sunahara RK, Gellman SH, Pautsch A, Steyaert J, Weis WI, Kobilka BK Nature. 2011 Jan 13;469(7329):175-80. PMID:21228869 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Adrenergic receptor Antibody Lysozyme 3D structures

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