光谱学与光谱分析 |
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Studies on the Mechanism of the Interaction between Hydrazide-Podophyllic Ni(Ⅱ), Co(Ⅱ), Zn(Ⅱ) Metal Complexes and DNA |
WANG Ping-hong1, ZHANG Qi1*, YUAN Wen-bing1, WANG Liu-fang2, SONG Yu-min3, LIU Hui-hong1 |
1. Province Key Laboratory of Refined Chemistry, Hainan University, Haikou 570228, China 2. State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China 3. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China |
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Abstract The mechanism of the interaction between hydrazide-podophyllic (HDPP) metal (Me) complexes and calf thymus (ct) DNA in Tris buffer (pH 7.08) was studied by viscosity measurements, electronic absorption, gel electrophoresis, and ethidium bromide (EB) fluorescence spectroscopy. The results from varied experiments show that the intensity of the maximal absorption peaks from absorption spectra is weakened in the presence of DNA compared with that in the absence of DNA. Meanwhile, DNA can remarkably quench the emission intensity of the complex Me-HDPP system. The Me-HDPP complexes can increase the viscosity of ct DNA slightly and catalyze the cleavage of super coiled pBR322 DNA to the nicked form. The complexes of Ni-HDPP and Co-HDPP can be bound to ct DNA mainly by interaction, while the partial interaction of Zn-HDPP and ct DNA is the major modes. The binding constant of Me-HDPP complexes with ct DNA was determined.
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Received: 2005-08-08
Accepted: 2005-10-28
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Corresponding Authors:
ZHANG Qi
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Cite this article: |
WANG Ping-hong,ZHANG Qi,YUAN Wen-bing, et al. Studies on the Mechanism of the Interaction between Hydrazide-Podophyllic Ni(Ⅱ), Co(Ⅱ), Zn(Ⅱ) Metal Complexes and DNA[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(07): 1298-1302.
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URL: |
https://www.gpxygpfx.com/EN/Y2006/V26/I07/1298 |
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