Chemokines and their receptors control cell migration during development, immune system responses, and in numerous diseases, including inflammation and cancer. The structural basis of receptor:chemokine recognition has been a long-standing unanswered ...
Chemokines and their receptors control cell migration during development, immune system responses, and in numerous diseases, including inflammation and cancer. The structural basis of receptor:chemokine recognition has been a long-standing unanswered question due to the challenges of structure determination for membrane protein complexes. Here, we report the crystal structure of the chemokine receptor CXCR4 in complex with the viral chemokine antagonist vMIP-II at 3.1 angstrom resolution. The structure revealed a 1:1 stoichiometry and a more extensive binding interface than anticipated from the paradigmatic two-site model. The structure helped rationalize a large body of mutagenesis data and together with modeling provided insights into CXCR4 interactions with its endogenous ligand CXCL12, its ability to recognize diverse ligands, and the specificity of CC and CXC receptors for their respective chemokines.
Organizational Affiliation:
Department of Chemistry, Bridge Institute. Department of Biological Sciences, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA.,Department of Chemistry, Bridge Institute.,University of California, San Diego, Skaggs School of Pharmacy and Pharmaceutical Sciences, La Jolla, CA 92093, USA.,Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.,Department of Chemistry, Bridge Institute. Department of Biological Sciences, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA. thandel@ucsd.edu stevens@usc.edu ikufareva@ucsd.edu.,University of California, San Diego, Skaggs School of Pharmacy and Pharmaceutical Sciences, La Jolla, CA 92093, USA. thandel@ucsd.edu stevens@usc.edu ikufareva@ucsd.edu.
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