4uy2

Crystal structure of the complex of the extracellular domain of human alpha9 nAChR with alpha-bungarotoxin.

spinqualitylabelsall models 4uy2, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4uy2 is a 4 chain structure with sequence from [1] and Bungarus multicinctus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NAG Related: 4uxu, 4d01 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed We determined the X-ray crystal structures of the extracellular domain (ECD) of the monomeric state of human neuronal alpha9 nicotinic acetylcholine receptor (nAChR) and of its complexes with the antagonists methyllycaconitine and alpha-bungarotoxin at resolutions of 1.8 A, 1.7 A and 2.7 A, respectively. The structure of the monomeric alpha9 ECD superimposed well with the structures of homologous proteins in pentameric assemblies, denoting native folding, despite the absence of a complementary subunit and transmembrane domain. The interaction motifs of both antagonists were similar to those in the complexes with homologous pentameric proteins, thus highlighting the major contribution of the principal side of alpha9 ECD to their binding. The structures revealed a functionally important beta7-beta10 strand interaction in alpha9-containing nAChRs, involving their unique Thr147, a hydration pocket similar to that of mouse alpha1 ECD and a membrane-facing network coordinated by the invariant Arg210. Crystal structures of free and antagonist-bound states of human alpha9 nicotinic receptor extracellular domain.,Zouridakis M, Giastas P, Zarkadas E, Chroni-Tzartou D, Bregestovski P, Tzartos SJ Nat Struct Mol Biol. 2014 Oct 5. doi: 10.1038/nsmb.2900. PMID:25282151 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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