کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8330979 | 1540241 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dacarbazine as a minor groove binder of DNA: Spectroscopic, biophysical and molecular docking studies
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
A detailed investigation on the mode of action and binding mechanism of a potent anticancer drug, 5-(3,3-dimethyl-1-triazeno)-imidazole-4-carboxamide (DCR) with calf thymus DNA (ctDNA) was carried out. UV-vis and fluorescence spectrophotometry suggested the formation of complex between DCR and ctDNA. The binding constant (Kb) determined by ITC was 7.89Â ÃÂ 104Â Mâ1. Thermodynamic parameters obtained by isothermal calorimetry suggested the spontaneous free energy (ÎGÂ <Â 0) and large favorable enthalpy driven (ÎHÂ <Â 0) reaction, indicating the key role of hydrogen bonding and van der Waals forces in groove binding process. Moreover, DNA-melting and circular dichroism as well as competitive displacement studies with ethidium bromide, Hoechst 33258 and potassium iodide, clearly established the formation of a groove binding system between the DCR and ctDNA. Molecular docking analysis further confirmed DCR to be a minor groove binder involving hydrogen bonding mediated 'A-T'-rich region of 'B-DNA'.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 79, August 2015, Pages 193-200
Journal: International Journal of Biological Macromolecules - Volume 79, August 2015, Pages 193-200
نویسندگان
Irshad Ahmad, Masood Ahmad,