化学学报 ›› 1999, Vol. 57 ›› Issue (2): 171-175. 上一篇    下一篇

研究论文

荧光法研究丝裂霉素C与DNA的作用机制

王瑞琼;鄢远;黄坚锋   

  1. 南昌大学化学系应用化学研究所
  • 发布日期:1999-02-15

Study on the interaction mechanism between mitomycin C and DNA by fluorescence method

Wang Ruiqiong;Yan Yuan;Huang Jianfeng   

  • Published:1999-02-15

以溴化乙锭(ethidiumbromide,EB)为荧光探针,研究了丝裂霉素C(mitomycinC,MMC)与小牛胸腺DNA(CTDNA)的作用机制。对荧光光谱、偏振荧光、Scatchard图、DNA热变性曲线等研究的结果表明,经Na2S2O4还原活化后的MMC能与DNA发生作用,并且存在沟槽和部分嵌入两种结合方式。这一结果进一步证实了前人提出的MMC与DNA之间发生交联反应的结论。

关键词: 荧光谱法, 脱氧核糖核酸, 丝裂霉素, 溴化乙锭

In this paper, the interaction mechanism between mitomycin C and calf thymus DNA has been studied by fluorescence method using EB as an extrinsic fluorescence probe. The results show that mitomycin C can interact with DNA only after being reductively activated by Na2S2O4, and the interaction mode between them should be minor groove binding and partial intercalation. This result further proves that mitomycin C interacts with DNA in the mode of cross-linking.

Key words: DEOXYRIBONUCLEIC ACID, MITOMYCIN, ETHIDIUM BROMIDE

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