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• W2057101841 startingPage "e23813" @default.
• W2057101841 abstract "Chemotaxis is essential for a number of physiological processes including leukocyte recruitment. Chemokines initiate intracellular signaling pathways necessary for chemotaxis through binding seven transmembrane G protein-couple receptors. Little is known about the proteins that interact with the intracellular domains of chemokine receptors to initiate cellular signaling upon ligand binding. CXCR2 is a major chemokine receptor expressed on several cell types, including endothelial cells and neutrophils. We hypothesize that multiple proteins interact with the intracellular domains of CXCR2 upon ligand stimulation and these interactions comprise a chemosynapse, and play important roles in transducing CXCR2 mediated signaling processes.In an effort to define the complex of proteins that assemble upon CXCR2 activation to relay signals from activated chemokine receptors, a proteomics approach was employed to identify proteins that co-associate with CXCR2 with or without ligand stimulation. The components of the CXCR2 chemosynapse are involved in processes ranging from intracellular trafficking to cytoskeletal modification. IQ motif containing GTPase activating protein 1 (IQGAP1) was among the novel proteins identified to interact directly with CXCR2. Herein, we demonstrate that CXCR2 co-localizes with IQGAP1 at the leading edge of polarized human neutrophils and CXCR2 expressing differentiated HL-60 cells. Moreover, amino acids 1-160 of IQGAP1 directly interact with the carboxyl-terminal domain of CXCR2 and stimulation with CXCL8 enhances IQGAP1 association with Cdc42.Our studies indicate that IQGAP1 is a novel essential component of the CXCR2 chemosynapse." @default.
• W2057101841 created "2016-06-24" @default.
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• W2057101841 date "2011-08-18" @default.
• W2057101841 modified "2023-09-30" @default.
• W2057101841 title "IQGAP1 Is a Novel CXCR2-Interacting Protein and Essential Component of the “Chemosynapse”" @default.
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• W2057101841 doi "https://doi.org/10.1371/journal.pone.0023813" @default.
• W2057101841 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3158102" @default.
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• W2057101841 hasPublicationYear "2011" @default.
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