Investigations of drug¨CDNA interactions using molecular docking, cyclic voltammetry and UV¨CVis spectroscopy

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• 作者：Fouzia Perveen ; Rumana Qureshi  ; ;   ; ^{r_qureshy@yahoo.com} ; Farzana Latif Ansari ; Saima Kalsoom ; Safeer Ahmed
• 关键词：Anticancer drugs ; ds.DNA ; Cyclic voltammetry ; UV&ndash ; Vis spectroscopy ; Binding parameters ; Molecular docking
• 刊名：Journal of Molecular Structure
• 出版年：2011
• 出版时间：12 October 2011
• 年：2011
• 卷：1004
• 期：1-3
• 页码：67-73
• 全文大小：834 K

文摘

Molecular docking and QSAR studies were carried out for the investigation of interactions between 11 antitumor drugs and double stranded DNA. Quantitative structure activity relationship was established using MOE software package showing good correlation of binding strength with various physicochemical parameters e.g., hydrophobic surface area (V_surf), E_HOMO, E_HUMO, partition coefficient (log P) and molar refractivity (M_R) of the drugs.

The most important parameter obtained from the docking studies was the formation constant (K_f) which is an indicative of the binding strength of the drug with DNA. This parameter was also calculated using the experimental techniques namely cyclic voltammetry (CV) and UV¨CVis spectrophotometry. Variation in electrochemical characteristics (shift in peak potential and peak current decrease) and spectral profile of these drugs on the addition of DNA were used to determine the values of formation constant. The docking studies were used to predict the mode of interaction of the drug with DNA. It was observed that as far as binding strength was concerned the computational results complemented the experimental results. The order of magnitude of experimental and theoretical K_f was same. The high value of K_f implied that the respective drugs bind to DNA most efficiently.