Referenced in: none

Automatically associated channels: ClIC4

Title: CLIC4 interacts with histamine H3 receptor and enhances the receptor cell surface expression.

Authors: Kay Maeda, Mitsuya Haraguchi, Atsuo Kuramasu, Takeya Sato, Kyohei Ariake, Hiroyuki Sakagami, Hisatake Kondo, Kazuhiko Yanai, Kohji Fukunaga, Teruyuki Yanagisawa, Jun Sukegawa

Journal, date & volume: Biochem. Biophys. Res. Commun., 2008 May 2 , 369, 603-8

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/18302930

Abstract
Histamine H3 receptor (H3R), one of G protein-coupled receptors (GPCRs), has been known to regulate neurotransmitter release negatively in central and peripheral nervous systems. Recently, a variety of intracellular proteins have been identified to interact with carboxy (C)-termini of GPCRs, and control their intracellular trafficking and signal transduction efficiencies. Screening for such proteins that interact with the C-terminus of H3R resulted in identification of one of the chloride intracellular channel (CLIC) proteins, CLIC4. The association of CLIC4 with H3R was confirmed in in vitro pull-down assays, coimmunoprecipitation from rat brain lysate, and immunofluorescence microscopy of rat cerebellar neurons. The data from flowcytometric analysis, radioligand receptor binding assay, and cell-based ELISA indicated that CLIC4 enhanced cell surface expression of wild-type H3R, but not a mutant form of the receptor that failed to interact with CLIC4. These results indicate that, by binding to the C-terminus of H3R, CLIC4 plays a critical role in regulation of the receptor cell surface expression.