6bjn | pdb_00006bjn
PICK1 PDZ domain in complex with the class I PDZ binding motif QSAV
Structural highlights
FunctionPICK1_HUMAN Probable adapter protein that bind to and organize the subcellular localization of a variety of membrane proteins containing some PDZ recognition sequence. Involved in the clustering of various receptors, possibly by acting at the receptor internalization level. Plays a role in synaptic plasticity by regulating the trafficking and internalization of AMPA receptors. May be regulated upon PRKCA activation. May regulate heteromeric ASIC1/ASIC3 channel.[1] Publication Abstract from PubMedThe membrane protein interacting with kinase C1 (PICK1) plays a trafficking role in the internalization of neuron receptors such as the amino-3-hydroxyl-5-methyl-4-isoxazole-propionate (AMPA) receptor. Reduction of surface AMPA type receptors on neurons reduces synaptic communication leading to cognitive impairment in progressive neurodegenerative diseases such as Alzheimer disease. The internalization of AMPA receptors is mediated by the PDZ domain of PICK1 which binds to the GluA2 subunit of AMPA receptors and targets the receptor for internalization through endocytosis, reducing synaptic communication. We planned to block the PICK1-GluA2 protein-protein interaction with a small molecule inhibitor to stabilize surface AMPA receptors as a therapeutic possibility for neurodegenerative diseases. Using a fluorescence polarization assay we identified compound BIO124 as a modest inhibitor of the PICK1-GluA2 interaction. We further tried to improve the binding affinity of BIO124 using structure-aided drug design but were unsuccessful in producing a co-crystal structure using previously reported crystallography methods for PICK1. Here we present a novel method through which we generated a co-crystal structure of the PDZ domain of PICK1 bound to BIO124. This article is protected by copyright. All rights reserved. Lock and Chop: A novel method for the generation of a PICK1 PDZ domain and piperidine-based inhibitor co-crystal structure.,Marcotte DJ, Hus JC, Banos CC, Wildes C, Arduini R, Bergeron C, Hession CA, Baker DP, Lin E, Guckian KM, Dunah AW, Silvian LF Protein Sci. 2017 Dec 27. doi: 10.1002/pro.3361. PMID:29280296[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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