| Structural highlights
Function
[CLTR1_HUMAN] Receptor for cysteinyl leukotrienes mediating bronchoconstriction of individuals with and without asthma. Stimulation by LTD4 results in the contraction and proliferation of smooth muscle, edema, eosinophil migration and damage to the mucus layer in the lung. This response is mediated via a G-protein that activates a phosphatidylinositol-calcium second messenger system. The rank order of affinities for the leukotrienes is LTD4 >> LTE4 = LTC4 >> LTB4.
Publication Abstract from PubMed
The G protein-coupled cysteinyl leukotriene receptor CysLT1R mediates inflammatory processes and plays a major role in numerous disorders, including asthma, allergic rhinitis, cardiovascular disease, and cancer. Selective CysLT1R 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 CysLT1R 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.
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 JM, 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 GW, Sarret P, Katritch V, Borshchevskiy V, Cherezov V Sci Adv. 2019 Oct 9;5(10):eaax2518. doi: 10.1126/sciadv.aax2518. eCollection 2019, Oct. PMID:31633023[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Luginina A, Gusach A, Marin E, Mishin A, Brouillette R, Popov P, Shiriaeva A, Besserer-Offroy E, Longpre JM, 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 GW, Sarret P, Katritch V, Borshchevskiy V, Cherezov V. Structure-based mechanism of cysteinyl leukotriene receptor inhibition by antiasthmatic drugs. Sci Adv. 2019 Oct 9;5(10):eaax2518. doi: 10.1126/sciadv.aax2518. eCollection 2019, Oct. PMID:31633023 doi:http://dx.doi.org/10.1126/sciadv.aax2518
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