食品科学 ›› 2009, Vol. 30 ›› Issue (19 ): 203-206.doi: 10.7506/spkx1002-6630-200919046

• 生物工程 • 上一篇    下一篇

固定化蛋白酶水解核桃蛋白及产物特性研究

薛 洋,黄 鹂,齐 斌,王立梅   

  1. 常熟理工学院发酵工程技术研究中心
  • 收稿日期:2009-06-15 出版日期:2009-10-01 发布日期:2010-12-29
  • 通讯作者: 薛 洋
  • 基金资助:

    江苏省高等学校大学生实践创新训练计划项目(08541)

Immobilized Neutrase-catalyzed Hydrolysis of Walnut Protein and Properties of Its Hydrolysates

XUE Yang,HUANG Li,QI Bin, WANG Li-mei*   

  1. Fermentation Engineering Technology Center, Changshu Institute of Technology, Changshu 215500, China
  • Received:2009-06-15 Online:2009-10-01 Published:2010-12-29
  • Contact: XUE Yang

摘要:

初步研究固定化蛋白酶对核桃蛋白的酶解条件及产物在亚油酸体系中的抗氧化性。用海藻酸钙包埋中性蛋白酶Neutrase 0.8L,固定化酶酶活保留率为57.41%;固定化酶最适pH6.0,最适温度50℃;在底物浓度为70g/L核桃蛋白溶液中加入3.5g/L固定化酶,保温5h,核桃蛋白水解度达18.37%;酶解产物具有明显的还原能力,并能有效地防止亚油酸的氧化。

关键词: 固定化, 核桃, 水解度, 抗氧化性, 中性蛋白酶

Abstract:

Hydrolysis procedure of walnut protein by calcium alginate immobilized neutrase 0.8 L with retention of original enzyme activity of 57.41% was studied and the hydrolysates were analyzed for antioxidant activity and amino acid composition.  The optimal pH and temperature for immobilized neutrase to hydrolyze walnut protein were 6.0 and 50 ℃, respectively. The highest degree of hydrolysis was 18.37% through 5 h reaction at pH 6.0 and 50 ℃ with an enzyme dose of 3.5 g/L. The hydrolysates of walnut protein exhibited obvious reducing power and provided effective protection against oxidation of linoleic acid.

Key words: immobilization, walnut, degree of hydrolysis, antioxidation, neutrase

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