食品科学

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固定化瑞士乳杆菌蛋白酶酶解乳清蛋白生产ACE抑制肽的条件优化

周慧敏1,刘 琛1,郭宇星1,*,潘道东1,2,曾小群2,孙杨赢2   

  1. 1.南京师范大学金陵女子学院,江苏 南京 210097;2.宁波大学海洋学院,浙江 宁波 315211
  • 出版日期:2015-04-15 发布日期:2015-05-05

Optimization of Enzymatic Hydrolysis Conditions for Production of ACE Inhibitory Peptides from Whey Protein Using Immobilized Proteinase of Lactobacillus helveticus

ZHOU Huimin1, LIU Chen1, GUO Yuxing1,*, PAN Daodong1,2, ZENG Xiaoqun2, SUN Yangying2   

  1. 1. Ginling College, Nanjing Normal University, Nanjing 210097, China;
    2. School of Marine Sciences, Ningbo University, Ningbo 315211, China
  • Online:2015-04-15 Published:2015-05-05

摘要:

以乳清浓缩蛋白WPC-80为原料,研究固定化瑞士乳杆菌蛋白酶酶解WPC-80生产血管紧张素转化酶(angiotensinⅠ-converting enzyme,ACE)抑制肽的工艺条件。通过单因素试验和响应面方法研究了酶解温度、酶解pH值、底物与酶质量比([S]/[E])、酶解时间对固定化瑞士乳杆菌蛋白酶制备ACE抑制肽的影响,确定了酶解乳清蛋白制备ACE抑制肽的最佳工艺条件为:温度37 ℃、pH 7.5、[S]/[E]=15%、酶解时间8 h。在此条件下,酶解产物的水解度为(6.05±0.36)%,ACE抑制率为(59.54±0.61)%。

关键词: ACE抑制肽, 固定化瑞士乳杆菌蛋白酶, 乳清蛋白, 响应面法

Abstract:

Angiotensin Ⅰ-converting enzyme (ACE) inhibitory peptides from WPC (whey protein concentrate)-80
were prepared by the immobilized proteinase produced by Lactobacillus helveticus. The effects of enzymatic hydrolysis
conditions including temperature, pH, substrate to enzyme ([S]/[E]) ratio and hydrolysis time on degree of hydrolysis
and ACE inhibitory activity were investigated using single factor method and response surface methodology. The optimum
temperature, pH, [S]/[E] ratio and hydrolysis time were found to be 37 ℃, 7.5, 15% and 8 h, respectively. Under these conditions,
the degree of hydrolysis was (6.05 ± 0.36)%, and the ACE inhibitory activity of the hydrolysate was (59.54 ± 0.61)%.

Key words: ACE inhibitory peptides, immobilized proteinase of Lactobacillus helveticus, whey protein, response surface methodology

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