National Natural Science Foundation of China (NSFC)
31771115
中国
Chinese Academy of Sciences
XDBS01020000
中国
National Key R&D Program
2017YFA0505700
中国
Shanghai Municipal Science and Technology Major Project
2018SHZDZX05
中国
National Natural Science Foundation of China (NSFC)
81625022
中国
Shanghai Municipal Health Commission in China
18431907100
中国
Shanghai Municipal Health Commission in China
19XD1404700
中国
National Natural Science Foundation of China (NSFC)
91853205
中国
National Natural Science Foundation of China (NSFC)
81821005
中国
引用
ジャーナル: Nature / 年: 2021 タイトル: Structural basis of ketamine action on human NMDA receptors. 著者: Youyi Zhang / Fei Ye / Tongtong Zhang / Shiyun Lv / Liping Zhou / Daohai Du / He Lin / Fei Guo / Cheng Luo / Shujia Zhu / 要旨: Ketamine is a non-competitive channel blocker of N-methyl-D-aspartate (NMDA) receptors. A single sub-anaesthetic dose of ketamine produces rapid (within hours) and long-lasting antidepressant effects ...Ketamine is a non-competitive channel blocker of N-methyl-D-aspartate (NMDA) receptors. A single sub-anaesthetic dose of ketamine produces rapid (within hours) and long-lasting antidepressant effects in patients who are resistant to other antidepressants. Ketamine is a racemic mixture of S- and R-ketamine enantiomers, with S-ketamine isomer being the more active antidepressant. Here we describe the cryo-electron microscope structures of human GluN1-GluN2A and GluN1-GluN2B NMDA receptors in complex with S-ketamine, glycine and glutamate. Both electron density maps uncovered the binding pocket for S-ketamine in the central vestibule between the channel gate and selectivity filter. Molecular dynamics simulation showed that S-ketamine moves between two distinct locations within the binding pocket. Two amino acids-leucine 642 on GluN2A (homologous to leucine 643 on GluN2B) and asparagine 616 on GluN1-were identified as key residues that form hydrophobic and hydrogen-bond interactions with ketamine, and mutations at these residues reduced the potency of ketamine in blocking NMDA receptor channel activity. These findings show structurally how ketamine binds to and acts on human NMDA receptors, and pave the way for the future development of ketamine-based antidepressants.