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Structure-based virtual screening of glycogen synthase kinase 3β inhibitors: analysis of scoring functions applied to
Dmitry I Osolodkin1, Vladimir A Palyulin, Nikolay S Zefirov
1Department of Chemistry, Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia.
Abstract:
Comparative assessment of nine different scoring functions (OpenEye and Tripos implementation) applied to structure-based virtual screening based on rigid docking of the pregenerated conformations library of glycogen synthase kinase 3β (GSK-3β) inhibitors has been carried out. The functions studied belong to the following types: Gaussian (Chemgauss3, Shapegauss), empirical (Chemscore, OEChemscore, Piecewise Linear Potential, Screenscore), force field-based (D_score and G_score), and potential of mean force (PMF_score). Overall enrichment of the large true inhibitors set against the set of true non-inhibitors, Directory of Useful Decoys (DUD), cyclin-dependent kinase 2 subset, and NCI Diversity Set was evaluated by means of ROC (receiver operating characteristic) method. According to this analysis, scoring function Chemscore leads to the best enrichment of the inhibitors whereas the best early enrichment of the actives may be obtained with the help of Chemgauss3 function as estimated by BEDROC (Boltzmann-enhanced discrimination of ROC) metrics.
