高等学校化学学报

• 研究论文 • 上一篇    下一篇

荧光光谱法结合多元曲线分辨-交替最小二乘法研究伞形花内酯与牛血清白蛋白的相互作用

刘根兰1, 倪永年1,2   

    1. 南昌大学食品科学与技术国家重点实验室, 南昌 330047;
    2. 南昌大学化学系, 南昌 330031
  • 收稿日期:2008-03-07 修回日期:1900-01-01 出版日期:2008-07-10 发布日期:2008-07-10
  • 通讯作者: 倪永年

Fluorescence Spectrometric Study on the Interaction Between Umbelliferone and Bovine Serum Albumin with the Use of MCR-ALS

LIU Gen-Lan1, NI Yong-Nian1,2*   

    1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China;
    2. Department of Chemistry, Nanchang University, Nanchang 330031, China
  • Received:2008-03-07 Revised:1900-01-01 Online:2008-07-10 Published:2008-07-10
  • Contact: NI Yong-Nian

摘要: 在模拟人体生理条件下(pH=7.4), 用荧光光谱法结合多元曲线分辨-交替最小二乘法(MCR-ALS)研究伞形花内酯与牛血清白蛋白(BSA)的相互作用. 采用两种不同的试剂滴加模式对伞形花内酯与BSA的相互作用进行研究, 对经典的荧光光谱数据矩阵加以扩展, 增加了实验数据的信息量; 进而应用MCR-ALS对该扩展的荧光光谱矩阵进行迭代计算, 较好地分辨出作用过程中浓度变化趋势图, 并计算出伞形花内酯与BSA的表观结合常数和结合比. 通过同步荧光光谱法发现伞形花内酯对BSA的构象有一定的影响.

关键词: 伞形花内酯, 牛血清白蛋白, 荧光光谱法, 多元曲线分辨-交替最小二乘法

Abstract: Under the imitated physiological conditions(pH=7.4), the interaction between umbelliferone and bovine serum albumin(BSA) was investigated by the fluorescence spectroscopy and the multivariate curve resolution-alternating least squares method(MCR-ALS). In this work, the interaction between umbelliferone and bovine serum albumin(BSA) was studied by performing two different kinds of titration modes. The two spectroscopic data matrices were augmented, and then the information of experiment data was increased. The augmented experiment data matrix was analyzed by the MCR-ALS method. This procedure allowed the recovery of the concentration profiles for each species and the calculation of the [BSA]∶[Umbelliferone] ratio in the complex and the apparent equilibrium constant. The effect of umbelliferone on the conformation of BSA was also analyzed via synchronous fluorescence spectrometry.

Key words: Umbelliferone, BSA, Fluorescence spectroscopy, MCR-ALS

中图分类号: 

TrendMD: