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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >The influence of Cu(II), Mg(II) on the binding of adriamycin with DNA and the study on their interaction mechanism
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The influence of Cu(II), Mg(II) on the binding of adriamycin with DNA and the study on their interaction mechanism

机译:Cu(II),Mg(II)对阿霉素与DNA结合的影响及其相互作用机理的研究

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摘要

Cu(II) and Mg(II) have different binding capacity with daunomycin, and have different combination mode with DNA. Selecting these two different metal ions, the influence of them on the binding constant of adriamycin with DNA and the related mechanism has been studied by using absorption and fluorescence spectroscopy. The result showed that Mg(II) has weaker binding capacity with the drug comparing Cu(II), but both Mg(IT) and Cu(II) can obviously reduce the binding constant of DNA with the drug. Addition of Cu(II) to the drug-DNA binary system can cause the reduction of fluorescence in the system, but addition of Mg(II) to it can cause the enhancement of fluorescence in some conditions. This show that the influence of Cu(II) and Mg(II) on the binding of the drug with DNA may be by a different mechanism. According to the main function of Mg(II) to bind with the phosphate groups on DNA, it can be deduced that for the interaction of the aglycon portion of the drug into the base pairs of DNA, the electrostatic binding between amine group of the drug with the phosphate group on DNA is a prerequisite. (c) 2005 Elsevier B.V. All rights reserved.
机译:Cu(II)和Mg(II)与道诺霉素的结合能力不同,与DNA的结合方式也不同。选择了这两种不同的金属离子,利用吸收光谱和荧光光谱研究了它们对阿霉素与DNA结合常数的影响及其相关机理。结果表明,Mg(II)与药物的结合能力较Cu(II)弱,但Mg(IT)和Cu(II)均可明显降低DNA与药物的结合常数。在药物-DNA二元体系中添加Cu(II)会导致系统中荧光的减少,但是在某些条件下向其中添加Mg(II)会导致荧光的增强。这表明Cu(II)和Mg(II)对药物与DNA结合的影响可能是通过不同的机制。根据Mg(II)与DNA磷酸基团结合的主要功能,可以推论出对于药物的糖苷配基部分与DNA碱基对的相互作用,药物的胺基之间的静电结合先决条件是在DNA上带有磷酸基。 (c)2005 Elsevier B.V.保留所有权利。

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