title: 3D QSAR studies on ketoamides of human cathepsin K inhibitors based on two different alignment methods.
abstract: Comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) were performed on 64 ketoamides as human cathepsin K (CatK) inhibitors, using ROCS ligand-based alignment and receptor-based alignment. Results generated from the ligand-based model were found to be superior to those obtained by the receptor-based model. CoMFA and CoMSIA field distributions are in good agreement with the structural characteristics of the binding groove of CatK, suggesting moderate substitutes at the P1, P2, P3 and P1' may favor the inhibitory activity of ketoamides. These results provide useful information in understanding the structural and chemical features of CatK in designing and finding novel potential CatK inhibitors as osteoporosis therapeutic agents.
authors: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, No 132, Lanhei Road, Kunming 650204, PR China.
authors: Xulin
authors: X
authors: Pan
authors: Ninghua
authors: N
authors: Tan
authors: Guangzhi
authors: G
authors: Zeng
authors: Huoqiang
authors: H
authors: Huang
authors: He
authors: H
authors: Yan
mesh_terms: D000577:Amides / Q000737:chemistry* / Q000494:pharmacology*; D056657:Cathepsin K / Q000037:antagonists & inhibitors*; D006801:Humans; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D011480:Protease Inhibitors / Q000737:chemistry* / Q000494:pharmacology*; D021281:Quantitative Structure-Activity Relationship
chemical_list: D000577:Amides; D008024:Ligands; D011480:Protease Inhibitors; D056657:Cathepsin K