变构酶
构象集合
蛋白质动力学
计算机科学
计算生物学
结构生物学
分子动力学
作者
Antonella Ciancetta,Amandeep Kaur Gill,Tianyi Ding,Dmitry S. Karlov,George Chalhoub,Peter J. McCormick,Irina G. Tikhonova
出处
期刊:ACS central science
[American Chemical Society]
日期:2021-09-28
卷期号:7 (11): 1847-1862
被引量:2
标识
DOI:10.1021/acscentsci.1c00802
摘要
Targeting G protein-coupled receptors (GPCRs) through allosteric sites offers advantages over orthosteric sites in identifying drugs with increased selectivity and potentially reduced side effects. In this study, we developed a probe confined dynamic mapping protocol that allows the prediction of allosteric sites at both the GPCR extracellular and intracellular sides, as well as at the receptor-lipid interface. The applied harmonic wall potential enhanced sampling of probe molecules in a selected area of a GPCR while preventing membrane distortion in molecular dynamics simulations. The specific probes derived from GPCR allosteric ligand structures performed better in allosteric site mapping compared to commonly used cosolvents. The M2 muscarinic, β2 adrenergic, and P2Y1 purinergic receptors were selected for the protocol's retrospective validation. The protocol was next validated prospectively to locate the binding site of [5-fluoro-4-(hydroxymethyl)-2-methoxyphenyl]-(4-fluoro-1H-indol-1-yl)methanone at the D2 dopamine receptor, and subsequent mutagenesis confirmed the prediction. The protocol provides fast and efficient prediction of key amino acid residues surrounding allosteric sites in membrane proteins and facilitates the structure-based design of allosteric modulators.
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