酪氨酸四肽与ct-DNA的相互作用
发布日期:2019-08-13 来源:分析测试学报 浏览数:2028 人
作者
孙志杰,吕名秀,卢奎*,段冰潮,刘广斌
单位
1.郑州大学化学与分子工程学院;2.河南工程学院材料与化学工程学院
基金项目:国家自然科学基金项目(21572046);河南省教育厅自然科学基金项目(14A150017)
中文摘要:采用Fmoc固相合成法合成了酪氨酸四肽(YYYY),经液相色谱-高效液相色谱(RP-HPLC)纯化,并用电喷雾质谱(ESI-MS)表征后,得到纯度大于90%的四肽,利用紫外光谱、圆二色光谱和荧光光谱研究了肽YYYY与ct-DNA的相互作用。结果表明,随着肽浓度的增加,ct-DNA的紫外吸收产生明显的增色效应,荧光猝灭显著,圆二色光谱发生红移。研究推测酪氨酸四肽以沟槽方式与ct-DNA发生相互作用,且酪氨酸四肽与ct-DNA的作用强于酪氨酸。
中文关键词:酪氨酸四肽 ct-DNA 相互作用 Fmoc固相合成法
Studies on Interaction of Tyr-Tyr-Tyr-Tyr with ct-DNA
Abstract:A model peptide,Tyr-Tyr-Tyr-Tyr(YYYY),was synthesized by Fmoc solid-phase methods,purified and separated by reverse phase high performance liquid chromatography(RP-HPLC),and characterized by ESI-MS analysis.The interaction of peptide with calf thymus DNA(ct-DNA) was investigated by UV-Vis absorption spectra,circular dichroism(CD) and fluorescence spectra.The results showed that,with the increase of peptide concentration,there were a hyperchromic effect on UV spectra,a remarkable fluorescence quenching and a red shift of CD.It is possible that Tyr-Tyr-Tyr-Tyr and Tyr might interact with ct-DNA via the groove binding mode.The interaction between Tyr-Tyr-Tyr-Tyr and ct-DNA,compared with that between Tyr and ct-DNA,is more stronger.
Key Words:Tyr-Tyr-Tyr-Tyr ct-DNA interaction Fmoc solid-phase methods
引用本文:孙志杰,吕名秀,卢奎*,段冰潮,刘广斌.酪氨酸四肽与ct-DNA的相互作用[J].分析测试学报,2017,36(1):101-105.
点击查看原文