title: Interaction models of a series of oxadiazole-substituted alpha-isopropoxy phenylpropanoic acids against PPARalpha and PPARgamma: molecular modeling and comparative molecular similarity indices analysis studies.
abstract: Molecular recognition of a series of oxadiazole-substituted alpha-isopropoxy phenylpropanoic acids by PPARalpha and PPARgamma was investigated by using molecular modeling and 3D-QSAR analyses. The binding models of these compounds were determined by hydrophobic property analyses and molecular docking procedure FlexX. It was found that the hydrophilic heads of these compounds form four specific conserved hydrogen bonds with the ligand binding pockets of PPARalpha and PPARgamma, which results in fixed head conformations. On the contrary, their hydrophobic tails adopt different configurations to make contacts with hydrophobic region. The oxadiazole-ring-related hydrogen bond interactions well elucidate the structural features governing the different binding behavior of these agonists against PPARalpha and PPARgamma. Based on these active conformations, highly predictive comparative molecular similarity indices analysis (CoMSIA) models were derived, which not only is consistent with the experimental results but also could be mapped back to the receptor topology and the ligand-receptor interaction models. The simulation results reveal the structure-activity relationship of these compounds at the molecular level and provide new insights for the design of novel potent PPARalpha and PPARgamma dual agonists.
authors.affiliation: Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 201203, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Cheng
authors.forename: Jianhua
authors.initials: J
authors.lastname: Shen
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Xu
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Luo
authors.forename: Kaixian
authors.initials: K
authors.lastname: Chen
authors.forename: Xu
authors.initials: X
authors.lastname: Shen
authors.forename: Hualiang
authors.initials: H
authors.lastname: Jiang
mesh_terms: D000595:Amino Acid Sequence; D003198:Computer Simulation; D057927:Hydrophobic and Hydrophilic Interactions; D008024:Ligands; D008956:Models, Chemical; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010069:Oxadiazoles / Q000737:chemistry*; D047493:PPAR alpha / Q000737:chemistry*; D047495:PPAR gamma / Q000737:chemistry*; D011422:Propionates / Q000737:chemistry*; D011485:Protein Binding; D021281:Quantitative Structure-Activity Relationship; D013329:Structure-Activity Relationship
chemical_list: D008024:Ligands; D010069:Oxadiazoles; D047493:PPAR alpha; D047495:PPAR gamma; D011422:Propionates