Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (6): 561-566. Previous Articles     Next Articles

DNA与非离子糖基表面活性剂相互作用的研究

敬登伟1, 张剑1,2, 张高勇1,2   

  1. 1. 中国日用化学工业研究院表面活性剂国家工程研究中心, 太原, 030001;
    2. 太原理工大学化学与化工学院, 太原, 030032
  • 投稿日期:2003-07-18 修回日期:2003-11-20 发布日期:2014-02-18
  • 通讯作者: 张高勇,E-mail:RIDCI@public.ty.sx.cn E-mail:RIDCI@public.ty.sx.cn
  • 基金资助:
    国家自然科学基金(No.20233010)资助项目.

Study on the Interaction between Nonionic Sugar-based Surfactant and DNA

JING Deng-Wei1, ZHANG Jian1,2, ZHANG Gao-Yong1,2   

  1. 1. Research Institute of Daily Chemical Industry, Taiyuan 030001;
    2. School of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030002
  • Received:2003-07-18 Revised:2003-11-20 Published:2014-02-18

The interaction of DNA with alkyl polyglucoside of different lengths was investigated by dynamic surface tension measurement, binding isotherm, UV spectra and fluorescence probe method. It was found that the binding of APG on DNA chain could be divided into two stages. At the first stage, multiglucoside interacted with DNA via its multi hydroxyl head group and formed with DNA a kinetic stable complex; at the second stage, monoglucoside due to its small head and hence less steric hindrance formed a thermal stable complex with DNA. Binding isotherms obtained by monoglucoside and DNA showed that binding of APG on DNA chain was a non-cooperative process, demonstrating the hydrogen bonding nature of the binding process. This also supports the model that APG micelle is surrounded by part of DNA chain. UV adsorption results showed the importance of hydrophobic effect in the interaction between DNA and APG. With ethidium bromide (EB) as probe, it was found by fluorescence spectra that DNA conformation was more compacted as the alkyl chain of APG increased. However, even C12APG could only partially compact DNA. Compared with the fact that CTAB could compact DNA into discrete globules, it was assumed that electrostatic effect was dominant in the interaction between DNA and surfactant.

Key words: DNA, sugar-based surfactant, binding isotherm, fluorescence spectrum