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-Structure paper
タイトル | Structural insights into the unexpected agonism of tetracyclic antidepressants at serotonin receptors 5-HTR and 5-HTR. |
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ジャーナル・号・ページ | Sci Adv, Vol. 10, Issue 16, Page eadk4855, Year 2024 |
掲載日 | 2024年4月19日 |
著者 | Gregory Zilberg / Alexandra K Parpounas / Audrey L Warren / Bianca Fiorillo / Davide Provasi / Marta Filizola / Daniel Wacker / |
PubMed 要旨 | Serotonin [5-hydroxytryptamine (5-HT)] acts via 13 different receptors in humans. Of these receptor subtypes, all but 5-HTR have confirmed roles in native tissue and are validated drug targets. ...Serotonin [5-hydroxytryptamine (5-HT)] acts via 13 different receptors in humans. Of these receptor subtypes, all but 5-HTR have confirmed roles in native tissue and are validated drug targets. Despite 5-HTR's therapeutic potential and plausible druggability, the mechanisms of its activation remain elusive. To illuminate 5-HTR's pharmacology in relation to the highly homologous 5-HTR, we screened a library of aminergic receptor ligands at both receptors and observe 5-HTR/5-HTR agonism by multicyclic drugs described as pan-antagonists at 5-HT receptors. Potent agonism by tetracyclic antidepressants mianserin, setiptiline, and mirtazapine suggests a mechanism for their clinically observed antimigraine properties. Using cryo-EM and mutagenesis studies, we uncover and characterize unique agonist-like binding poses of mianserin and setiptiline at 5-HTR distinct from similar drug scaffolds in inactive-state 5-HTR structures. Together with computational studies, our data suggest that these binding poses alongside receptor-specific allosteric coupling in 5-HTR and 5-HTR contribute to the agonist activity of these antidepressants. |
リンク | Sci Adv / PubMed:38630816 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.31 Å |
構造データ | EMDB-42241, PDB-8ugy: EMDB-42245, PDB-8uh3: |
化合物 | ChemComp-CLR:
ChemComp-WRU: ChemComp-HOH:
ChemComp-WOQ: |
由来 |
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キーワード | SIGNALING PROTEIN / GPCR / Complex |