高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (11): 1556.

• 研究论文 • 上一篇    下一篇

含7-氨基-4-甲基香豆素的蛋白酶荧光底物

张若蘅1, 贾韶娟1, 徐小杰1, 唐有祺1, 杨广微2, 倪逸声2   

  1. 1. 北京大学化学系, 北京 100871;
    2. 北京大学生物系
  • 收稿日期:1993-02-19 修回日期:1993-07-10 出版日期:1993-11-24 发布日期:1993-11-24
  • 通讯作者: 张若蘅 , 男, 34岁.
  • 作者简介:张若蘅 , 男, 34岁.
  • 基金资助:

    国家自然科学基金会青年基金

Proteinase Fluorogenic Substrates Containing 7-Amino-4- methylcoumarin

ZHANG Ruo-Heng1, JIA Shao-Juan1, XU Xiao-Jie1, TANG You-Qi1, YANG Guang-Wei2, NI Yi-Sheng2   

  1. 1. Department of Chemistry, Peking University, Beijing, 100871;
    2. Department of Biology, Peking University, Beijing, 100871
  • Received:1993-02-19 Revised:1993-07-10 Online:1993-11-24 Published:1993-11-24

摘要: 本文设计并合成了一系列舍7-氨基-4-甲基香豆素的肽类荧光底物,通过动力学测定研究了氨基酸结构对底物专一性的形响,发现Sue-Ala-Ala-Phe-AMC和Suc-Ala-Pro-Phe-AMC是较好的胰凝乳蛋白酶荧光底物.

关键词: 荧光底物, 香豆素, 胰凝乳蛋白酶

Abstract: The fluorogenic substrates have been used for the highly sensitive determination of chymotrypsin.The sensitivity is due to the fact that the leaving group, some fluorogenic amine, is highly fluororesent.In the present communication, we wish to report the design, synthesis and kinetic study of a series peptide amide substrates containing 7-amino-4-methylcoumarin.By calculating the enzyme's kcat and Km values for the substrates, the influence of amino acid sequence on the specificity of substrates was studied.Therefore, the best fluorogenic substrates for chymotrypsin, Suc-Ala-Ala-Phe-MCand Sue-Ala-Pro-Phe-MC, were found.

Key words: Fluorogenic substrate, Coumarin, Chymotrypsin

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