7RAN

5-HT2AR bound to a novel agonist in complex with a mini-Gq protein and an active-state stabilizing single-chain variable fragment (scFv16) obtained by cryo-electron microscopy (cryoEM)

7RAN の概要

• エントリーDOI: 10.2210/pdb7ran/pdb
• EMDBエントリー: 24378
• 分子名称: 5-hydroxytryptamine receptor 2A, G protein subunit q (Gi2-mini-Gq chimera), Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1, ... (6 entities in total)
• 機能のキーワード: 5-ht2a receptor, serotonin receptor, g protein, gpcr, novel agonist, cryoem, membrane protein
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 5
• 化学式量合計: 142403.71

構造登録者

Barros-Alvarez, X.,Kim, K.,Panova, O.,Roth, B.L.,Skiniotis, G. (登録日: 2021-07-02, 公開日: 2022-07-06, 最終更新日: 2025-05-21)

主引用文献

Kaplan, A.L.,Confair, D.N.,Kim, K.,Barros-Alvarez, X.,Rodriguiz, R.M.,Yang, Y.,Kweon, O.S.,Che, T.,McCorvy, J.D.,Kamber, D.N.,Phelan, J.P.,Martins, L.C.,Pogorelov, V.M.,DiBerto, J.F.,Slocum, S.T.,Huang, X.P.,Kumar, J.M.,Robertson, M.J.,Panova, O.,Seven, A.B.,Wetsel, A.Q.,Wetsel, W.C.,Irwin, J.J.,Skiniotis, G.,Shoichet, B.K.,Roth, B.L.,Ellman, J.A.
Bespoke library docking for 5-HT 2A receptor agonists with antidepressant activity.
Nature, 610:582-591, 2022

PubMed Abstract: There is considerable interest in screening ultralarge chemical libraries for ligand discovery, both empirically and computationally. Efforts have focused on readily synthesizable molecules, inevitably leaving many chemotypes unexplored. Here we investigate structure-based docking of a bespoke virtual library of tetrahydropyridines-a scaffold that is poorly sampled by a general billion-molecule virtual library but is well suited to many aminergic G-protein-coupled receptors. Using three inputs, each with diverse available derivatives, a one pot C-H alkenylation, electrocyclization and reduction provides the tetrahydropyridine core with up to six sites of derivatization. Docking a virtual library of 75 million tetrahydropyridines against a model of the serotonin 5-HT receptor (5-HTR) led to the synthesis and testing of 17 initial molecules. Four of these molecules had low-micromolar activities against either the 5-HT or the 5-HT receptors. Structure-based optimization led to the 5-HTR agonists (R)-69 and (R)-70, with half-maximal effective concentration values of 41 nM and 110 nM, respectively, and unusual signalling kinetics that differ from psychedelic 5-HTR agonists. Cryo-electron microscopy structural analysis confirmed the predicted binding mode to 5-HTR. The favourable physical properties of these new agonists conferred high brain permeability, enabling mouse behavioural assays. Notably, neither had psychedelic activity, in contrast to classic 5-HTR agonists, whereas both had potent antidepressant activity in mouse models and had the same efficacy as antidepressants such as fluoxetine at as low as 1/40th of the dose. Prospects for using bespoke virtual libraries to sample pharmacologically relevant chemical space will be considered.

PubMed: 36171289
DOI: 10.1038/s41586-022-05258-z

実験手法

ELECTRON MICROSCOPY (3.45 Å)