鸭血清胆碱酯酶的纯化及性质研究

被引:7
作者
郭胜清
曹树桂
程玉华
机构
[1] 吉林大学酶工程国家重点实验室
[2] 吉林大学酶工程国家重点实验室 长春
关键词
胆碱酯酶; 双水相萃取; 胆碱酯酶的分离纯化;
D O I
暂无
中图分类号
学科分类号
摘要
首次采用新技术双水相萃取方法作为鸭血清胆碱酯酶(EC.3.1.1.8 CHE) 纯化的第一步,后经 DEAE-Sephadex A50,sephadex G200 柱层析,获得电泳纯鸭血清胆碱酯酶,提纯倍数1018倍,酶活力回收43.4%,比活274.9U/mg。鸭血清胆碱酯酶性质研究表明:此酶是糖蛋白和酸性蛋白水解酶,等电点 4.2 左右,最适 pH7.5 左右;对底物碘化硫代丁酰胆碱的 Km=9.8×10-5mol/L;SDS-PAGE 电泳和聚丙烯酰胺梯度电泳表明,鸭血清胆碱酯酶以相同亚基组成的不同聚合体形式存在,亚基分子量 78000,具有完整的酶活性.不同聚合体带电状态相同.
引用
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页码:119 / 124
页数:6
相关论文
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