6ITM

Crystal structure of FXR in complex with agonist XJ034

6ITM の概要

• エントリーDOI: 10.2210/pdb6itm/pdb
• 分子名称: Bile acid receptor, HD3 Peptide from Nuclear receptor coactivator 1, 1-adamantyl-[4-(5-chloranyl-2-methyl-phenyl)piperazin-1-yl]methanone, ... (4 entities in total)
• 機能のキーワード: fxr, agonist, non-alcoholic liver disease, docking screening, transcription
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 60224.08

構造登録者

Zhang, H.,Wang, Z. (登録日: 2018-11-23, 公開日: 2019-11-27, 最終更新日: 2023-11-22)

主引用文献

Xia, J.,Wang, Z.,Huan, Y.,Xue, W.,Wang, X.,Wang, Y.,Liu, Z.,Hsieh, J.H.,Zhang, L.,Wu, S.,Shen, Z.,Zhang, H.,Wang, X.S.
Pose Filter-Based Ensemble Learning Enables Discovery of Orally Active, Nonsteroidal Farnesoid X Receptor Agonists.
J.Chem.Inf.Model., 60:1202-1214, 2020

PubMed Abstract: Farnesoid X receptor (FXR) agonists can reverse dysregulated bile acid metabolism, and thus, they are potential therapeutics to prevent and treat nonalcoholic fatty liver disease. The low success rate of FXR agonists' R&D and the side effects of clinical candidates such as obeticholic acid make it urgent to discover new chemotypes. Unfortunately, structure-based virtual screening (SBVS) that can speed up drug discovery has rarely been reported with success for FXR, which was likely hindered by the failure in addressing protein flexibility. To address this issue, we devised human FXR (hFXR)-specific ensemble learning models based on pose filters from 24 agonist-bound hFXR crystal structures and coupled them to traditional SBVS approaches of the FRED docking plus Chemgauss4 scoring function. It turned out that the hFXR-specific pose filter ensemble (PFE) was able to improve ligand enrichment significantly, which rendered 3RUT-based SBVS with its PFE the ideal approach for FXR agonist discovery. By screening of the Specs chemical library and in vitro FXR transactivation bioassay, we identified a new class of FXR agonists with compound XJ034 as the representative, which would have been missed if the PFE was not coupled. Following that, we performed in-depth biological studies which demonstrated that XJ034 resulted in a downtrend of intracellular triglyceride in vitro, significantly decreased the serum/liver TG in high fat diet-induced C57BL/6J obese mice, and more importantly, showed metabolic stabilities in both plasma and liver microsomes. To provide insight into further structure-based lead optimization, we solved the crystal structure of hFXR complexed with compound XJ034, uncovering a unique hydrogen bond between compound XJ034 and residue Y375. The current work highlights the power of our pose filter-based ensemble learning approach in terms of scaffold hopping and provides a promising lead compound for further development.

PubMed: 32050066
DOI: 10.1021/acs.jcim.9b01030

実験手法

X-RAY DIFFRACTION (2.5 Å)