食品科学 ›› 2006, Vol. 27 ›› Issue (6): 151-154.

• 工艺技术 • 上一篇    下一篇

瑞士乳杆菌发酵法制备乳清蛋白源性ACE抑制肽的研究

 郭宇星, 陈庆森, 赵林森, 杨晓威   

  1. 天津市食品生物技术重点实验室天津商学院生物技术与食品科学学院; 石家庄市兄弟伊兰香精香料有限公司
  • 出版日期:2006-06-15 发布日期:2011-09-22

ACE Inhibitory Peptides of Whey Protein Fermentation with Lactobacillus helveti

 GUO  Yu-Xing, CHEN  Qing-Sen, ZHAO  Lin-Sen, YANG  Xiao-Wei   

  1. 1.Tianjin Key Laboratory of Food Biotechnology, College of Bio-technology and Food Science, Tianjin University of Commerce, Tianjin 300134, China;2.Shijiazhuang Brothers Industry and Commerce Co.Ltd., Shijiazhuang 050000, China
  • Online:2006-06-15 Published:2011-09-22

摘要: 利用益生菌发酵法制备ACE抑制肽(AngiotensinI-ConvertingEnzyme(ACE)inhibitorypeptides)已成为近年来研究的新热点,对于功能性食品的开发具有十分重要的意义。本文以瑞士乳杆菌(Lactobacillushelveticus)为发酵菌种,研究了其水解乳清蛋白的能力及发酵产物的ACE抑制活性。研究发现发酵产品在瑞士乳杆菌对数生长期收获时为最佳,16h收获时ACE抑制率达到44.17%,活菌数为107CFU/ml。发酵产品超滤结果显示,用10000D分子量膜超滤后,其ACE抑制活性比未超滤前提高2.5倍,IC50达到19.63μg/ml。最后对发酵产品进行喷雾干燥和冷冻干燥,发现这两种干燥方法对产品ACE抑制活性没有影响,冷冻干燥的方法产率比较高,可达到106.08g/L,且IC50为50.28μg/ml。

关键词: 瑞士乳杆菌, 乳清蛋白, 蛋白水解能力, ACE抑制活性

Abstract: Preparing the Angiotensin Converting Enzyme (ACE) inhibitory peptides fermented by probiotic has become a new hot pot in recent years, and it was significant to the development of the functional food market. Proteolytic activity of Lactobacillus helveticus was studied in this article and the ACE-inhibitory activity of the products was also researched. It showed that the products harvested in the period of logarithm growth have better performance. After 16h fermentation, the ACE -inhibitory activity reached to 44.17% and cell count was 107CFU/ml in the products. The ACE-inhibitory activity of the product ultrafiltratedby 10000D molecular weight membrane is 2.5 times higher than is the product that not ultrafiltrated. The IC50 reaches to 19.63μg/ml. Finally two methods of dryness are studied, one is spray- dry and the other is freez- dry. ACE-inhibitory activity of the products is not affected by these two methods. Output of the product made by the freeze-dried method is higher: it reaches to 106.08g/L, and IC50 of the product is 50.28μg/ml.

Key words:  , Lactobacillus helveticus; whey protein; proteolytic activity; ACE-inhibitory activity;