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.
- MeSH
- antagonisté leukotrienů chemie metabolismus MeSH
- antiastmatika chemie metabolismus MeSH
- chromony chemie metabolismus MeSH
- krystalografie rentgenová MeSH
- lidé MeSH
- ligandy MeSH
- receptory leukotrienů chemie genetika metabolismus MeSH
- rekombinantní proteiny biosyntéza chemie izolace a purifikace MeSH
- simulace molekulového dockingu MeSH
- sodík chemie metabolismus MeSH
- terciární struktura proteinů MeSH
- tosylové sloučeniny chemie metabolismus MeSH
- vazebná místa MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Research Support, U.S. Gov't, Non-P.H.S. MeSH
