Citation:
CONG Yong, XUE Ying. Quantitative Structure-Activity Relationship Study of the Non-Nucleoside Inhibitors of HCV NS5B Polymerase by Machine Learning Methods[J]. Acta Physico-Chimica Sinica,
;2013, 29(08): 1639-1647.
doi:
10.3866/PKU.WHXB201305171
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The quantitative structure-activity relationship (QSAR) approach was used to predict the activity of two different scaffolds (benzoisothiazole and benzothiazine) of 89 non-nucleoside inhibitors of hepatitis c virus (HCV) NS5B polymerase. Two selection methods, linear stepwise regression analysis (LSRA) and genetic al rithm-partial least squares (GA-PLS), were used to select appropriate descriptor subsets for QSAR modeling with linear models. The genetic al rithm-support vector machine (GA-SVM) approach was first used to build nonlinear models with six LSRA- and seven GA-PLS-selected descriptors. Three QSAR models built with the six LSRA-selected descriptors gave correlation coefficients of 0.958-0.962 for the training set. GA-SVM provided the highest prediction accuracy of the models of 0.962. Three QSAR models built with the seven GA-PLS-selected descriptors gave correlation coefficients of 0.918-0.960 for the training set, of which the partial least squares (PLS) model was the best (0.960). The investigated models gave satisfactory prediction results and can be extended to other QSAR studies.
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