title: Multistructure 3D-QSAR studies on a series of conformationally constrained butyrophenones docked into a new homology model of the 5-HT2A receptor.
abstract: The present study is part of a long-term research project aiming to gain insight into the mechanism of action of atypical antipsychotics. Here we describe a 3D-QSAR study carried out on a series of butyrophenones with affinity for the serotonin-2A receptor, aligned by docking into the binding site of a receptor model. The series studied has two peculiarities: (i) all the compounds have a chiral center and can be represented by two enantiomeric structures, and (ii) many of the structures can bind the receptor in two alternative orientations, posing the problem of how to select a single representative structure for every compound. We have used an original solution consisting of the simultaneous use of multiple structures, representing different configurations, binding conformations, and positions. The final model showed good statistical quality (n = 426, r2 = 0.84, q2LOO = 0.81) and its interpretation provided useful information, not obtainable from the simple inspection of the ligand-receptor complexes.
authors.affiliation: Research Unit on Biomedical Informatics (GRIB), IMIM, Universitat Pompeu Fabra, Dr. Aiguader 88, E-08003 Barcelona, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Dezi
authors.forename: José
authors.initials: J
authors.lastname: Brea
authors.forename: Mario
authors.initials: M
authors.lastname: Alvarado
authors.forename: Enrique
authors.initials: E
authors.lastname: Raviña
authors.forename: Christian F
authors.initials: CF
authors.lastname: Masaguer
authors.forename: María Isabel
authors.initials: MI
authors.lastname: Loza
authors.forename: Ferran
authors.initials: F
authors.lastname: Sanz
authors.forename: Manuel
authors.initials: M
authors.lastname: Pastor
mesh_terms: D001665:Binding Sites; D002090:Butyrophenones / Q000378:metabolism / Q000494:pharmacology*; D008958:Models, Molecular; D021281:Quantitative Structure-Activity Relationship; D044402:Receptor, Serotonin, 5-HT2A / Q000187:drug effects* / Q000378:metabolism
chemical_list: D002090:Butyrophenones; D044402:Receptor, Serotonin, 5-HT2A