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-Structure paper
| タイトル | Structural basis of LY334370 recognition and selectivity at the 5-HT receptor. |
|---|---|
| ジャーナル・号・ページ | Biochem Biophys Res Commun, Vol. 804, Page 153313, Year 2026 |
| 掲載日 | 2026年3月12日 |
著者 | Yumeng Wang / Chunyu Wang / Can Cao / ![]() |
| PubMed 要旨 | The 5-HT receptor is a serotonin receptor subtype highly expressed in trigeminal sensory neurons, where it modulates neuropeptide release and nociceptive signaling without inducing vasoconstriction. ...The 5-HT receptor is a serotonin receptor subtype highly expressed in trigeminal sensory neurons, where it modulates neuropeptide release and nociceptive signaling without inducing vasoconstriction. This makes it an important therapeutic target for migraine. LY334370 was developed as a first-generation selective 5-HTR agonist and demonstrated efficacy in clinical studies. However, the molecular mechanism underlying 5-HTR activation by LY334370 remains poorly understood. Here, we determined a 3.13 Å cryo-EM structure of the LY334370-bound 5-HTR-miniGα complex. Combined with functional analyses, this structure delineates the molecular determinants underlying LY334370 recognition. Comparison with BRL54443 indicates that LY334370 selectivity for 5-HTR is driven by its optimal accommodation within the receptor-specific extended binding pocket. Furthermore, comparative analysis with the lasmiditan-bound 5-HTR-Gα complex reveals distinct agonist binding modes and provides mechanistic insight into Gα subtype-specific coupling. Collectively, these findings elucidate the structural basis of 5-HTR activation, ligand selectivity, and G protein coupling, providing a structural framework for the rational design of safer and more effective anti-migraine drugs. |
リンク | Biochem Biophys Res Commun / PubMed:41619505 |
| 手法 | EM (単粒子) |
| 解像度 | 3.13 - 3.18 Å |
| 構造データ | EMDB-67446, PDB-21ag: EMDB-67447, PDB-21ah: |
| 化合物 | ![]() PDB-1e2g: |
| 由来 |
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キーワード | MEMBRANE PROTEIN/IMMUNE SYSTEM / MEMBRANE PROTEIN-IMMUNE SYSTEM complex / MEMBRANE PROTEIN |
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