Molecular docking and comparative molecular similarity indices analysis of estrogenicity of polybrominated diphenyl ethers and their analogues.
Molecular docking and three-dimensional quantitative structure-activity relationships (3D-QSAR) were used to develop models to predict estrogenicity of polybrominated diphenyl ethers (PBDEs), para-hydroxylated polybrominated diphenyl ethers (para-HO-PBDEs), and brominated bisphenol A compounds to the human estrogen receptor alpha (hERalpha). Based on the molecular conformations developed from the molecular docking, predictive comparative molecular similarity indices analysis (CoMSIA) models were developed. The results of CoMSIA modeling with region focusing included were: leave-one-out (LOO) cross-validated coefficient q(2)(LOO) = 0.722 (all 26 compounds), q(2)(LOO) = 0.633 (the training set, 20 compounds), q(2)(LMO, two groups) = 0.520 +/- 0.155 (26 compounds), q(2)(LMO, five groups) = 0.665 +/- 0.068 (26 compounds), predictive r(2), r(2)(pred) = 0.686 (the test set, 6 compounds), and Q(2)(EXT) = 0.678. The 3D-QSAR can be used to infer the activities of compounds with similar structural characteristics. The interaction mechanism between compounds and the hERalpha was explored. Hydrogen bonding of the compound with Glu353 in the hERalpha is an important determinant of the estrogenic activity of para-HO-PBDEs and brominated bisphenol A.
Yang
Weihua
W
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, China.
Liu
Xiaohua
X
Liu
Hongling
H
Wu
Yang
Y
Giesy
John P
JP
Yu
Hongxia
H
D052244:Endocrine Disruptors / Q000737:chemistry / Q000633:toxicity*; D047629:Estrogen Receptor beta / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D055768:Halogenated Diphenyl Ethers / Q000737:chemistry / Q000633:toxicity*; D006801:Humans; D006860:Hydrogen Bonding; D008958:Models, Molecular; D021281:Quantitative Structure-Activity Relationship
D052244:Endocrine Disruptors; D047629:Estrogen Receptor beta; D055768:Halogenated Diphenyl Ethers