食品科学 ›› 2008, Vol. 29 ›› Issue (4): 54-57.

• 基础研究 • 上一篇    下一篇

硫酸软骨素与铜离子的配位特性研究

熊双丽, 金征宇   

  1. 西南科技大学生命科学与工程学院; 江南大学食品学院 ;
  • 出版日期:2008-04-15 发布日期:2011-08-24

Binding Property of Chondroitin Sulfate and Cupric Ion

XIONG  Shuang-Li, JIN  Zheng-Yu   

  1. 1.College of Life Science and Engineering, Southwest University of Science and Technology; 2.School of Food Science and Technology, Jiangnan University
  • Online:2008-04-15 Published:2011-08-24

摘要: 制备硫酸软骨素(ChS)铜配合物,分析其光谱学和热力学特征,再将ChS进行羧基还原、脱硫和硫酸酯化等化学修饰制备成相应衍生物,用荧光淬灭实验和平衡透析实验分析ChS及衍生物与铜离子的配位特性。ChS铜配合物的光谱学和热力学性质变化说明ChS与铜离子发生了配位作用。荧光淬灭实验和平衡透析实验结果显示:将ChS进行羧基还原或多硫酸化后,ChS与铜离子的配位作用减弱,而脱硫后的ChS的配位作用增强,说明是ChS中的羧基而非硫酸基与铜离子发生了配位作用。

关键词: 硫酸软骨素, 衍生物, 配位特性

Abstract: This experiment studied the ChS-Cu (chondroitin sulfate-Cu) complex, analyzed its spectroscopic and thermody- namics characteristics, and its three chemically reduced or sulfonated or desulfate derivatives, and compared the binding properties of unmodified ChS and its three chemically reduced or sulfonated or desulfate derivatives by fluorescence quenching assay and equilibrium dialysis technique. The changes of spectroscopic assay and thermodynamics of ChS-Cu complex exhibit the mating reactions between ChS and Cu2+. The results of luorescence quenching assay and equilibrium dialysis experiments showed that the carboxy group but not sulfate group is involved in this reaction.

Key words: chondroitin sulfate, derivative, binding property