食品科学 ›› 2013, Vol. 34 ›› Issue (9): 240-244.doi: 10.7506/spkx1002-6630-201309049

• 生物工程 • 上一篇    下一篇

醋蛋水解物的类蛋白反应及其对ACE抑制活性的影响

杨 锋1,2,陈锦屏1,莫锦薇2   

  1. 1.陕西师范大学生命科学学院,陕西 西安 710062;2.广西工学院生物与化学工程系,广西 柳州 545006
  • 收稿日期:2012-04-06 修回日期:2013-03-15 出版日期:2013-05-15 发布日期:2013-05-07
  • 通讯作者: 杨锋 E-mail:yangfeng78@126.com

Impact of Plastein Reaction on ACE Inhibitory Activity of Vinegar Egg Hydrolysates

YANG Feng1,2,CHEN Jin-ping1,MO Jin-wei2   

  1. 1. College of Life Sciences, Shaanxi Normal University, Xi’an 710062, China;2. Department of Biological and Chemical
    Engineering, Guangxi University of Technology, Liuzhou 545006, China
  • Received:2012-04-06 Revised:2013-03-15 Online:2013-05-15 Published:2013-05-07
  • Contact: YANG Feng E-mail:yangfeng78@126.com

摘要:

为研究类蛋白反应对醋蛋水解物ACE抑制活性的影响,先利用胃蛋白酶水解醋蛋液,再添加胃蛋白酶和氨基酸对其进行类蛋白反应,并采用单因素试验优化反应条件。结果表明:优化类蛋白反应条件为:氨基酸选用脯氨酸、脯氨酸添加量为1mol/mol水解物游离氨基、底物质量分数50%、反应pH 5.0、反应温度37℃、反应时间12h,在此条件下,类蛋白产率为25.82%。在优化条件下,通过控制不同的反应时间制备不同的类蛋白反应产物,并测定每个产物的ACE抑制活性。反应6h以后的产物其ACE抑制活性较反应前的活性明显增强,其中反应12h的产物活性最高,其IC50值从反应前的0.48mg/mL降低到0.17mg/mL。经过12h的与脯氨酸的类蛋白反应,能显著提高醋蛋水解物的ACE抑制活性。

关键词: 醋蛋水解物, 类蛋白反应, ACE抑制活性

Abstract:

This study was conducted to investigate the effect of plastein reaction on ACE inhibitory activity of vinegar egg
hydrolysates. A pepsin hydrolysate of vinegar egg was prepared and modified by plastein reaction with pepsin and amino
acids. The optimum plastein reaction conditions were obtained when the reaction was iniated by mixing proline with free
amino aicds in the hydrolysate in a proporption of 1 mol/mol and adjusting to pH 5.0 and procceeded at 37 ℃ for 12 h
with a substrate concentration of 50%. Under these reaction conditions, the plastein yield was 25.82%. Different plastein
products were prepared by adjusting reaction time and the ACE inhibitory activity of these products was determined. The
results showed that the ACE inhibitory activity of products after reaction for 6 h or more were improved and the highest
ACE inhibitory activity was observed when the reaction time was extended to 12 h with an IC50 of 0.17 mg/mL, compared
to 0.48 mg/mL for the origianal hydrolysate. The ACE inhibitory activity of vinegar egg hydrolysates could be improved
significantly by plastein reaction with proline for 12 h.

Key words: vinegar egg hydrolysates, plastein reaction, ACE inhibitory activity

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