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Computational Modeling of Interaction between Camptothecin and DNA Base pairs

机译:喜树碱与DNA碱基对相互作用的计算模型

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Understanding the physicochemical interaction between the novel drug Camptothecin (CTTC) and itsbiological receptor DNA is very important. Molecular modeling on the complex formed betweenCTTC and DNA presented this complex to be fully capable of participating in the formation of a stableintercalation site. The molecular geometries of CTTC and DNA bases were optimized with the aid ofB3LYP/6-31G* method. Properties of the isolated intercalator and its stacking interactions withadenine thymine (AT) and guanine cytosine (GC) nucleic acid base pairs were studied with theDFTB method. Interaction energies of drug base pair complexes were found to be -6.65 and -9.71kcal/mol for AT CTTC and GC CTTC, respectively.
机译:了解新药喜树碱(CTTC)和其生物学受体DNA之间的物理化学相互作用非常重要。在CTTC和DNA之间形成的复合物的分子模型表明该复合物完全能够参与形成稳定的嵌入位点。借助B3LYP / 6-31G *方法优化了CTTC和DNA碱基的分子几何结构。用DFTB方法研究了分离的嵌入剂的性质及其与腺嘌呤胸腺嘧啶(AT)和鸟嘌呤胞嘧啶(GC)核酸碱基对的堆叠相互作用。发现AT CTTC和GC CTTC的药物碱基对复合物的相互作用能分别为-6.65和-9.71kcal / mol。

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