QUANTITATIVE STRUCTURE-ACTIVITY RELATIONSHIP STUDY ON THE BINDING AFFINITY OF SOME AMINOTHIAZOLE DERIVATIVES WITH A DOPAMINE RECEPTOR IN BRAIN
M. Mahani1, S. Sheikhghomi2, H. Sheikhghomi3, J. Fasihi3
1Graduate University of Advanced Technology, Kerman, Iran
2Iran University of Medical Sciences, Tehran, Iran
3Nuclear Science and Technology Institute, Tehran, Iran
Keywords: QSAR, partial least squares, soft modeling, structural descriptors, aminothiazole derivatives, dopamine receptor
Abstract
Quantitative structure-activity relationship (QSAR) models can be applied as a powerful tool for predicting the response in biological and chemical systems. D2 receptor subtypes as dopamine receptors assist dopaminergic neurotransmission in brain. In this work, binding affinities of synthesized agonists with D2-like receptors in binding assays using rat brain were related to the structural properties of these agonists. The structural descriptors of these compounds are calculated. A stepwise variable selection is applied for PLS modeling. The walk and path counts, 2D autocorrelations, 3D atom pairs, RDF, 3D-MoRSE, WHIM, GETAWAY blocks are among the selected descriptors. The PLS model is built with 5 latent variables. The predictive ability of the model is evaluated on a set of 5 ligands, which are not used in modeling steps and the acceptable results are obtained.
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