天然产物研究与开发 ›› 2012, Vol. 23 ›› Issue (6): 793-.doi: A

• 开发研究 • 上一篇    下一篇

米糠蛋白抗氧化活性肽的制备

周 梅1,张 敏1,2*   

  1. 1东北农业大学食品学院,哈尔滨 150030;2北京工商大学,北京 100037
  • 收稿日期:2011-09-19 出版日期:2012-07-04 发布日期:2012-07-06
  • 基金资助:

    国家自然基金项目(31101387)

Preparation of Anti-oxidation Bioactive Peptide of Rice Bran Protein

ZHOU Mei1, ZHANG Min1,2*   

  1. 1Food College, Northeast Agricultural University, Harbin 150030, China; 2Beijing Technology and Business University, Beijing 100037, China
  • Received:2011-09-19 Online:2012-07-04 Published:2012-07-06

摘要: 以水解度(DH%)和对DPPH自由基清除率为指标,筛选出制备米糠蛋白抗氧化活性肽的最适蛋白酶。研究最适蛋白酶的酶解条件,探讨底物浓度、蛋白酶的加入量、pH值、酶解时间等因素对水解度(DH%)和DPPH自由基清除率的影响;在单因素基础上采用Box-Behnken响应曲面中心组合设计法,对酶解米糠蛋白的工艺进行优化。试验结果表明,在加酶量13970.82 U/g,时间3.05 h,底物浓度4.97%的水解条件下,米糠蛋白的水解度能够达到23.67%,活性肽对DPPH自由基清除率达到64.26% 。

关键词: 米糠蛋白, 水解度, DPPH清除率, 响应面

Abstract: This study screened the most suitable prolease of preparation of bioactive peptide with the indexes of Hydrolysis (DH%) and the eliminating rate of DPPH free radical. In order to find the most suitable zymohydrolysis condition of prolease, effects of concentration of substrate, pH, addition of protease and dissociation-time on the hydrolysis (DH%) and the eliminating rate of DPPH freeradical in hydrolyzing were investigated. Based on the single-factor experiment, the optimum conditions of extraction of bioactive peptide from rice bran by the Box-Behnken response surface methodology design of Design-Expert 7.0 were determined as follows: addition amount of enzyme 13970.82 U/g, dissociation-time 3 h and concentration 4.97%. The results showed that degree of hydrolysis of rice bran protein was 23.67% and the eliminating rate of DPPH free radical could reach 64.26% under the optimum conditions.

Key words: bran protein, degree of hydrolysis, DPPH radical scavenging abilities, response surface

中图分类号: 

TS201.4