高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (4): 577.

• 研究论文 • 上一篇    下一篇

人纤维蛋白溶酶原的化学修饰

梁放1, 吴一卉1, 曹海石1, 郭慧云1, 刘兰英1, 孙宏2, 陈维金2, 刘淑英2   

  1. 1. 吉林大学生命科学学院, 长春 130023;
    2. 长春生物制品研究所, 长春 130061
  • 收稿日期:2000-03-28 出版日期:2001-04-24 发布日期:2001-04-24
  • 通讯作者: 刘兰英(1942年出生),女,教授,主要从事酶结构与功能的研究.E-mail:ying@public.cc.jl.cn E-mail:ying@public.cc.jl.cn
  • 基金资助:

    振兴中华教育科学基金(批准号:960002)资助

Chemical Modification of Human Plasminogen

LIANG Fang1, WU Yi-Hui1, CAO Hai-Shi1, GUO Hui-Yun1, LIU Lan-Ying1, SUN Hong2, CHEN Wei-Jin2, LIU Shu-Ying2   

  1. 1. College of Life Science, Jilin University, Changchun 130023, China;
    2. Changchun Institute of Biological Products, Changchun 130061, China
  • Received:2000-03-28 Online:2001-04-24 Published:2001-04-24

摘要: 分别以乙基咪唑(NAI)、1,2-环己二酮(CHD)、碳二亚胺(EDC)和氯氨-T(Ch-T)作修饰剂,研究人纤维蛋白溶酶原(HPg)中的酪氨酸、精氨酸、羧基和蛋氨酸残基对HPg活性的影响,发现HPg中的酪氨酸和精氨酸残基的修饰对HPg活性影响不大,而羧基和蛋氨酸残基的修饰导致HPg酶活性丧失.按Keech和Farrant动力学方法分析,得出有以两个羧基和一个蛋氨酸残基为HPg活性的必需基团,其中一个羧基为活性中心外的必需基团

关键词: 人纤维蛋白溶酶原, 化学修饰, 羧基, 蛋氨酸

Abstract: The chemical modification of human plasminogen(HPg) was studied with NAI, 1,2-cyclohexanodine, Ch-T, and EDCas the modification reagents on its Tyr, Arg, Met and carboxyl groups. The results indicate that Tyr and Arg residues are not activity dependent groups, while Met and carboxyl groups played an important role on HPg's activity. The kinetic analysis demonstrates that one Met residue and two carboxyl groups are essential for HPg's activity.

Key words: Human Plasminogen, Chemical modification, Carboxyl group, Methionine

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