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-Structure paper
| タイトル | Structural basis of opioid receptor activation by PCP and ketamine. |
|---|---|
| ジャーナル・号・ページ | Nat. Struct. Mol. Biol., Year 2026 |
| 掲載日 | 2025年6月25日 (構造データの登録日) |
著者 | Qianru Jiang / Jianming Han / Eve J Fine / Nokomis Ramos-Gonzalez / Vipin Ashok Rangari / Micaela V Ruiz / Madalyn L Critz / Carl-Mikael Suomivuori / Jing Wang / Talia L Albert / Kyle Whiddon / Kunpeng Li / Michael J Robertson / Xi-Ping Huang / Benjamin B Land / Susruta Majumdar / Jonathan F Fay / Ron O Dror / Tao Che / ![]() |
| PubMed 要旨 | Ketamine offers rapid relief for treatment-resistant depression and severe pain in the clinic, providing immediate benefits that traditional medications often fail to deliver. While its antagonistic ...Ketamine offers rapid relief for treatment-resistant depression and severe pain in the clinic, providing immediate benefits that traditional medications often fail to deliver. While its antagonistic action at the N-methyl-D-aspartate receptor (NMDAR) is a key mechanism, ketamine's dual nature as both a promising treatment and a drug with abuse potential suggests its therapeutic effects extend beyond NMDAR inhibition. Here we provide structural evidence of human opioid receptors bound to ketamine and its parent analog phencyclidine (PCP), supporting that both ligands can directly bind and activate opioid receptors. The structures, together with site-directed mutagenesis and structure-activity relationship studies, identify key motifs involved in ketamine and PCP recognition and efficacy modulation. Furthermore, we determine the structure of the ligand-free state of human κ opioid receptor, revealing molecular details before ligand engagement. Compared to PCP, ketamine displays more notable binding dynamics in the orthosteric site that may contribute to its unique pharmacology at opioid receptors. Our findings highlight the importance of including opioid receptors to fully understand ketamine's versatility in clinical settings. |
リンク | Nat. Struct. Mol. Biol. / PubMed:42332075 |
| 手法 | EM (単粒子) |
| 解像度 | 2.5 - 3.43 Å |
| 構造データ | ![]() PDB-9pa1: ![]() PDB-9pa2: ![]() PDB-9pa3: ![]() PDB-9pa4: ![]() PDB-9pa5: ![]() PDB-9pa6: |
| 化合物 | ![]() ChemComp-1PC: ![]() PDB-1che: ![]() ChemComp-JC9: |
| 由来 |
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キーワード | SIGNALING PROTEIN / kappa opioid receptor / mu-opioid receptor / GPCR |
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