Structure-based mechanism of cysteinyl leukotriene receptor inhibition by antiasthmatic drugs.Luginina, A., Gusach, A., Marin, E., Mishin, A., Brouillette, R., Popov, P., Shiriaeva, A., Besserer-Offroy, E., Longpre, J.M., Lyapina, E., Ishchenko, A., Patel, N., Polovinkin, V., Safronova, N., Bogorodskiy, A., Edelweiss, E., Hu, H., Weierstall, U., Liu, W., Batyuk, A., Gordeliy, V., Han, G.W., Sarret, P., Katritch, V., Borshchevskiy, V., Cherezov, V.
(2019) Sci Adv 5: eaax2518-eaax2518
- PubMed: 31633023
- DOI: 10.1126/sciadv.aax2518
- Primary Citation of Related Structures:
- PubMed Abstract:
The G protein-coupled cysteinyl leukotriene receptor CysLT <sub>1 </sub>R mediates inflammatory processes and plays a major role in numerous disorders, including asthma, allergic rhinitis, cardiovascular disease, and cancer. Selective CysLT <sub>1 </ ...
The G protein-coupled cysteinyl leukotriene receptor CysLT 1 R mediates inflammatory processes and plays a major role in numerous disorders, including asthma, allergic rhinitis, cardiovascular disease, and cancer. Selective CysLT 1 R antagonists are widely prescribed as antiasthmatic drugs; however, these drugs demonstrate low effectiveness in some patients and exhibit a variety of side effects. To gain deeper understanding into the functional mechanisms of CysLTRs, we determined the crystal structures of CysLT 1 R bound to two chemically distinct antagonists, zafirlukast and pranlukast. The structures reveal unique ligand-binding modes and signaling mechanisms, including lateral ligand access to the orthosteric pocket between transmembrane helices TM4 and TM5, an atypical pattern of microswitches, and a distinct four-residue-coordinated sodium site. These results provide important insights and structural templates for rational discovery of safer and more effective drugs.
Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Quebec J1H 5N4, Canada.,Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA.,Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny 141701, Russia.,Department of Physics, Arizona State University, Tempe, AZ 85287, USA.,Juelich Center for Structural Biology, Research Center Juelich, Juelich, Germany.,Institute of Crystallography, RWTH Aachen University, Aachen, Germany.,Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA.,Institut de Biologie Structurale J.-P. Ebel, Université Grenoble Alpes-CEA-CNRS, Grenoble 38000, France.,ELI Beamlines, Institute of Physics, Czech Academy of Sciences, 18221 Prague, Czech Republic.,Departments of Chemistry and Biological Sciences, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA.,Institute of Complex Systems, ICS-6: Structural Biochemistry, Research Centre Juelich, Juelich, Germany.