高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (11): 1697.

• 论文 • 上一篇    下一篇

锌试剂与牛血清白蛋白作用机理的研究

迟燕华1, 庄稼1, 李娜2, 李克安2, 童沈阳2   

  1. 1. 西南工学院材料科学与工程系, 绵阳 621002;
    2. 北京大学化学与分子工程学院, 北京 100871
  • 收稿日期:1998-11-20 出版日期:1999-11-24 发布日期:1999-11-24
  • 通讯作者: 李克安
  • 作者简介:迟燕华,女,43岁,副教授.
  • 基金资助:

    国家自然科学基金(批准号:29362601)资助课题

Studies on the Reaction Between Zincon and Bovine Serum Album in

CHI Yan-Hua1, ZHUANG Jia1, LI Na2, LI Ke-An2, TONG Shen-Yang2   

  1. 1. Department of Material Science and Engineering, Southwest Institute of Technology, Mianyang 621002, China;
    2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:1998-11-20 Online:1999-11-24 Published:1999-11-24

摘要: 采用UV光谱法研究了锌试剂与牛血清白蛋白(BSA)在弱酸性溶液中的结合反应,研究了溶液吸光度与BSA浓度的关系。测得其表观摩尔吸光系数εP=1.3×106L·mol-1·cm-1,最大结合数n=278,表观结合常数Kc=8×107.研究了小分子探针与蛋白质的反应机理及在蛋白质上的结合部位及结合力类型。它们之间主要是以分子间的静电引力结合反应。离子强度对结合反应有显著的影响;不同类型的表面活性剂均以不同的程度和形式对反应有影响。讨论了此结合反应的模式,认为该反应基本符合Scatchard模型。

关键词: 锌试剂, 牛血清白蛋白, UV光谱, 结合常数, 表面活性剂

Abstract: The interaction of zincon(ZCN) with bovine serum albumin(BSA) and the changes of its spectrum were studied by UV spectra at pH4.1 buffer solution. The conditional constants, apparent molar absorptivity εP=1.3×106L·mol-1·cm-1, maximum binding number n=278 and apparent binding equilibrium constant Kc=8×107were obtained. It was considered that electrostatic force is the main binding force. The ion(sodium chloride) concentration of the solution has significant effect on binding reaction of BSAand ZCN. The effects of different denaturants were also examined. The Scatchard model is appropriate in the treatment of data obtained.

Key words: Zincon, Bovine serum albumin, UV spectra, Apparent binding equilibricem constant, Denaturant

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