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机构地区:[1]华南理工大学化工与能源学院,广东广州510640 [2]华南农业大学理学院,广东广州510642
出 处:《华南理工大学学报(自然科学版)》2006年第8期70-74,共5页Journal of South China University of Technology(Natural Science Edition)
基 金:国家自然科学基金资助项目(20501008);广东省绿色化学产品技术重点实验室资助项目(322-B2041541)
摘 要:采用荧光光谱、电子吸收光谱、粘度测定及琼脂凝胶电泳等实验方法,研究了邻菲咯啉-铜-甘氨酸、邻菲咯啉-铜-异亮氨酸和邻菲咯啉-铜-蛋氨酸三种配合物与DNA的相互作用.荧光、电子吸收及粘度实验均表明,三种配合物与DNA的作用都为部分插入;琼脂凝胶电泳显示,三种配合物对pBR322 DNA有较明显的切割作用.此外,辅助配体氨基酸空间位阻过大会阻碍配合物与DNA的插入作用,过小也不利于插入作用.The interactions between DNA and three complexes, namely, [ Cu (phen) (L-Gly) (H2O)] · ClO4 · 2.5 H2O ( phen = phenanthroline, L-Gly = L-Glycine ) , [ Cu (phen) (L-Ile) ( H2O) ] ( ClO4 ) ( L-Ile = Isoleucine ) and [ Cu (phen) (L-Met) ( H2O) ] ( ClO4 ) ( L-Met = L-Methionine), were investigated by means of the fluorescence spectroscopy, the electronic absorption spectroscopy, the viscosity measurement and the agarose gel electrophoresis. It is revealed by the fluorescence spectroscopy, the electronic absorption spectroscopy and the viscosity measurement that the mode of the interaction between the complexes and DNA is partial intercalation. Moreover, the results of agarose gel electrophoresis indicate that all the complexes exhibit obvious pBR322 DNA cleavage activity. Furthermore, a moderate size of the auxiliary ligand should be taken into consideration because a larger or smaller steric hindrance of the auxiliary ligand would affect the interaction between the three designed complexes and DNA.
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