Theoretical studies on pyrimidine substituent derivatives as dual inhibitors of AP-1 and NF-kappaB.

Journal of Molecular Modeling
Li QianKang-Cheng Zheng

Abstract

Theoretical studies on the three-dimensional (3D) quantitative structure-activity relationship (QSAR) and mechanisms of action of a series of pyrimidine substituent derivatives as dual inhibitors of AP-1 and NF-kappaB were carried out using comparative molecular field analysis (CoMFA) and docking methods. The established 3D-QSAR model exhibits a satisfying statistical quality and prediction ability. Docking results show somewhat lower average values of the flexible and rigid energy scores in the chosen binding sites. The docking analysis offers appropriate orientations and conformations of these compounds at the binding sites to both AP-1 and NF-kappaB in good agreement with the 3D-QSAR model from CoMFA. The combined CoMFA and docking study suggests the following substituent selections: substituent R(2) should be a kind of H-N-thienyl or CH(3)-N-thienyl group; substituent R(5) should be a kind of COO-tBu or COOEt group; and substituent R(4) should be a CH(2)CH(3) or 2-thienyl group. The docking analysis also shows that the binding sites fall just at the joint regions between AP-1 (or NF-kappaB) and DNA, where these compounds can effectively prevent free AP-1 and NF-kappaB from binding to DNA, and this may be the reason that der...Continue Reading

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