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DOI | 10.1186/s13321-017-0253-8 |
3D-QSAR study of steroidal and azaheterocyclic human aromatase inhibitors using quantitative profile of protein-ligand interactions | |
Lee, Sehan; Barron, Mace G. | |
发表日期 | 2018-01-18 |
ISSN | 1758-2946 |
卷号 | 10 |
英文摘要 | Aromatase is a member of the cytochrome P450 superfamily responsible for a key step in the biosynthesis of estrogens. As estrogens are involved in the control of important reproduction-related processes, including sexual differentiation and maturation, aromatase is a potential target for endocrine disrupting chemicals as well as breast cancer therapy. In this work, 3D-QSAR combined with quantitative profile of protein-ligand interactions was employed in the identification and characterization of critical steric and electronic features of aromatase-inhibitor complexes and the estimation of their quantitative contribution to inhibition potency. Bioactivity data on pIC(50) values of 175 steroidal and 124 azaheterocyclic human aromatase inhibitors (AIs) were used for the 3D-QSAR analysis. For the quantitative description of the effects of the hydrophobic contact and nitrogen-heme-iron coordination on aromatase inhibition, the hydrophobicity density field model and the smallest dual descriptor Delta f(r)(S) were introduced, respectively. The model revealed that hydrophobic contact and nitrogen-heme-iron coordination primarily determines inhibition potency of steroidal and azaheterocyclic AIs, respectively. Moreover, hydrogen bonds with key amino acid residues, in particular Asp309 and Met375, and interaction with the heme-iron are required for potent inhibition. Phe221 and Thr310 appear to be quite flexible and adopt different conformations according to a substituent at 4- or 6-position of steroids. Flexible docking results indicate that proper representation of the residues' flexibility is critical for reasonable description of binding of the structurally diverse inhibitors. Our results provide a quantitative and mechanistic understanding of inhibitory activity of steroidal and azaheterocyclic AIs of relevance to adverse outcome pathway development and rational drug design. |
英文关键词 | Aromatase inhibitor;Adverse outcome pathway;3D-QSAR;Steroid;Azaheterocycle;Hydrophobic contact;Nitrogen-heme-iron coordination;Dual descriptor |
语种 | 英语 |
WOS记录号 | WOS:000422995400001 |
来源期刊 | JOURNAL OF CHEMINFORMATICS |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/62128 |
作者单位 | US EPA, Gulf Ecol Div, 1 Sabine Isl Dr, Gulf Breeze, FL 32561 USA |
推荐引用方式 GB/T 7714 | Lee, Sehan,Barron, Mace G.. 3D-QSAR study of steroidal and azaheterocyclic human aromatase inhibitors using quantitative profile of protein-ligand interactions[J]. 美国环保署,2018,10. |
APA | Lee, Sehan,&Barron, Mace G..(2018).3D-QSAR study of steroidal and azaheterocyclic human aromatase inhibitors using quantitative profile of protein-ligand interactions.JOURNAL OF CHEMINFORMATICS,10. |
MLA | Lee, Sehan,et al."3D-QSAR study of steroidal and azaheterocyclic human aromatase inhibitors using quantitative profile of protein-ligand interactions".JOURNAL OF CHEMINFORMATICS 10(2018). |
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