title: Modeling robust QSAR. 1. Coding molecules in 3D-QSAR--from a point to surface sectors and molecular volumes.
abstract: Shape analysis is a powerful tool in chemistry and drug design. In the current work, we compare the results of CoMFA and Comparative Molecular Surface Analysis (CoMSA), the 3D-QSAR method, for a series of hypolipidemic and antiplatelet asarones and antifungal N-myristoyltransferase inhibitors. In this publication we show that a sector CoMSA formalism enables an analysis of the biological activity that is more directly related to the molecular shape and individual molecular functionalities than the traditional uniform and directionless CoMFA field. Iterative Variable Elimination allowed us to identify the potential pharmacophoric sites. We modeled QSARs for both series and demonstrate that sector-based molecular descriptors give very predictive models and allow one to generate a spatial interpretation of the QSAR models. In particular, we identified the central aromatic ring and carbonyl functions as the moieties determining the activity of the asarones series, while the pattern of substitution of the aromatic ring determines the activity of N-myristoyltransferase inhibitors.
authors.affiliation: Department of Organic Chemistry, Institute of Chemistry, University of Silesia, PL-40-006 Katowice, Poland.
authors.forename: Rafal
authors.initials: R
authors.lastname: Gieleciak
authors.forename: Tomasz
authors.initials: T
authors.lastname: Magdziarz
authors.forename: Andrzej
authors.initials: A
authors.lastname: Bak
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Polanski
mesh_terms: D000217:Acyltransferases / Q000037:antagonists & inhibitors / Q000378:metabolism; D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology; D003198:Computer Simulation; D015195:Drug Design; D000960:Hypolipidemic Agents / Q000737:chemistry / Q000494:pharmacology; D015394:Molecular Structure; D010975:Platelet Aggregation Inhibitors / Q000737:chemistry / Q000494:pharmacology; D021281:Quantitative Structure-Activity Relationship; D012984:Software
chemical_list: D000935:Antifungal Agents; D000960:Hypolipidemic Agents; D010975:Platelet Aggregation Inhibitors; D000217:Acyltransferases; C050480:glycylpeptide N-tetradecanoyltransferase