National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
1R01GM108921
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
3R01GM108921-03S1
米国
American Heart Association
17POST33671152
米国
引用
ジャーナル: Nat Commun / 年: 2018 タイトル: Cryo-EM structure of 5-HT receptor in its resting conformation. 著者: Sandip Basak / Yvonne Gicheru / Amrita Samanta / Sudheer Kumar Molugu / Wei Huang / Maria la de Fuente / Taylor Hughes / Derek J Taylor / Marvin T Nieman / Vera Moiseenkova-Bell / Sudha Chakrapani / 要旨: Serotonin receptors (5-HTR) directly regulate gut movement, and drugs that inhibit 5-HTR function are used to control emetic reflexes associated with gastrointestinal pathologies and cancer therapies. ...Serotonin receptors (5-HTR) directly regulate gut movement, and drugs that inhibit 5-HTR function are used to control emetic reflexes associated with gastrointestinal pathologies and cancer therapies. The 5-HTR function involves a finely tuned orchestration of three domain movements that include the ligand-binding domain, the pore domain, and the intracellular domain. Here, we present the structure from the full-length 5-HTR channel in the apo-state determined by single-particle cryo-electron microscopy at a nominal resolution of 4.3 Å. In this conformation, the ligand-binding domain adopts a conformation reminiscent of the unliganded state with the pore domain captured in a closed conformation. In comparison to the 5-HTR crystal structure, the full-length channel in the apo-conformation adopts a more expanded conformation of all the three domains with a characteristic twist that is implicated in gating.