2i0b | pdb_00002i0b

Crystal structure of the GluR6 ligand binding core ELKQ mutant dimer at 1.96 Angstroms Resolution

spinqualitylabelsall models 2i0b, resolution 1.96Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2i0b is a 3 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GLU, SO4 Related: 2f36, 1yae, 1lb8 Gene: Grik2, Glur6 (Rattus norvegicus) Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Desensitization is a universal feature of ligand-gated ion channels. Using the crystal structure of the GluR2 L483Y mutant channel as a guide, we attempted to build non-desensitizing kainate-subtype glutamate receptors. Success was achieved for GluR5, GluR6 and GluR7 with intermolecular disulfide cross-links but not by engineering the dimer interface. Crystallographic analysis of the GluR6 Y490C L752C dimer revealed relaxation from the active conformation, which functional studies reveal is not sufficient to trigger desensitization. The equivalent non-desensitizing cross-linked GluR2 mutant retained weak sensitivity to a positive allosteric modulator, which had no effect on GluR2 L483Y. These results establish that the active conformation of AMPA and kainate receptors is conserved and further show that their desensitization requires dimer rearrangements, that subtle structural differences account for their diverse functional properties and that the ligand-binding core dimer is a powerful regulator of ion-channel activity. Conformational restriction blocks glutamate receptor desensitization.,Weston MC, Schuck P, Ghosal A, Rosenmund C, Mayer ML Nat Struct Mol Biol. 2006 Dec;13(12):1120-7. Epub 2006 Nov 19. PMID:17115050 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ionotropic Glutamate Receptors

Proteopedia Page Contributors and Editors (what is this?)

OCA