3hpm

Oxidized dimeric PICK1 PDZ C46G mutant in complex with the carboxyl tail peptide of GluR2

spinqualitylabelsall models 3hpm, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3hpm is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 3hpk, 2pku Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 PICK1 is a PDZ/BAR domain-containing scaffold protein that regulates the trafficking of many receptors and ion channels, including AMPA receptors. In addition to binding to a wide spectrum of target proteins to be transported, the PICK1 PDZ domain, via its conserved CPC motif, has also been shown to bind to lipid membranes. However, the molecular basis of the CPC motif-mediated lipid membrane binding of the PICK1 PDZ domain is not known. Here we show that the Cys residues in the CPC motif of the PICK1 PDZ domain forms reversible, intermolecular disulfide bonds under mild oxidation conditions. Importantly, formation of the disulfide-mediated dimer abolishes the lipid membrane binding capacity of the PICK1 PDZ domain and thereby is expected to alter the cellular functions of PICK1. The structures of the PDZ dimers provide atomic-scale pictures of disulfide-mediated PICK1 dimer formation and a molecular explanation of the oxidation-induced dissociation of PICK1 from membranes. We propose that the PICK1-mediated trafficking processes might be regulated by cellular redox fluctuations under both physiological and pathophysiological conditions. Redox-regulated lipid membrane binding of the PICK1 PDZ domain.,Shi Y, Yu J, Jia Y, Pan L, Shen C, Xia J, Zhang M Biochemistry. 2010 Jun 1;49(21):4432-9. PMID:20426484 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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