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QSAR Analysis of 2-Amino or 2-Methyl-1-Substituted Benzimidazoles Against Pseudomonas aeruginosa
Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
Institute of Public Health, Zmaj Jovina 30, 24000 Subotica, Serbia
* Author to whom correspondence should be addressed.
Received: 9 January 2009; in revised form: 18 March 2009 / Accepted: 20 March 2009 / Published: 17 April 2009
Abstract: A set of benzimidazole derivatives were tested for their inhibitory activities against the Gram-negative bacterium Pseudomonas aeruginosa and minimum inhibitory concentrations were determined for all the compounds. Quantitative structure activity relationship (QSAR) analysis was applied to fourteen of the abovementioned derivatives using a combination of various physicochemical, steric, electronic, and structural molecular descriptors. A multiple linear regression (MLR) procedure was used to model the relationships between molecular descriptors and the antibacterial activity of the benzimidazole derivatives. The stepwise regression method was used to derive the most significant models as a calibration model for predicting the inhibitory activity of this class of molecules. The best QSAR models were further validated by a leave one out technique as well as by the calculation of statistical parameters for the established theoretical models. To confirm the predictive power of the models, an external set of molecules was used. High agreement between experimental and predicted inhibitory values, obtained in the validation procedure, indicated the good quality of the derived QSAR models.
Keywords: QSAR; benzimidazole derivatives; Pseudomonas aeruginosa; multiple linear regression
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Podunavac-Kuzmanović, S.O.; Cvetković, D.D.; Barna, D.J. QSAR Analysis of 2-Amino or 2-Methyl-1-Substituted Benzimidazoles Against Pseudomonas aeruginosa. Int. J. Mol. Sci. 2009, 10, 1670-1682.
Podunavac-Kuzmanović SO, Cvetković DD, Barna DJ. QSAR Analysis of 2-Amino or 2-Methyl-1-Substituted Benzimidazoles Against Pseudomonas aeruginosa. International Journal of Molecular Sciences. 2009; 10(4):1670-1682.
Podunavac-Kuzmanović, Sanja O.; Cvetković, Dragoljub D.; Barna, Dijana J. 2009. "QSAR Analysis of 2-Amino or 2-Methyl-1-Substituted Benzimidazoles Against Pseudomonas aeruginosa." Int. J. Mol. Sci. 10, no. 4: 1670-1682.