食品科学 ›› 2010, Vol. 31 ›› Issue (9): 161-165.doi: 10.7506/spkx1002-6630-201009037

• 生物工程 • 上一篇    下一篇

乳清蛋白酶解物促嗜酸乳杆菌增殖作用研究

白凤翎1,2,李晓东1,廖 玲1,张柏林1 ,*,金 苏1,汪 涛1,蒋湘宁1   

  1. 1.北京林业大学生物科学与技术学院 2.渤海大学生物与食品科学学院
  • 收稿日期:2009-07-08 修回日期:2010-03-01 出版日期:2010-05-01 发布日期:2010-12-29
  • 通讯作者: 张柏林 E-mail:zhangbolin888@126.com
  • 基金资助:

    国家“863”计划项目(2008AA10Z335;2006AA10Z344)

Effect of Pepsin-based Whey Protein Hydrolysates on Proliferation of Lactobacillus acidophilus

BAI Feng-ling1,2,LI Xiao-dong1,LIAO Ling1,ZHANG Bo-lin1,*,JIN Su1,WANG Tao1,JIANG Xiang-ning1   

  1. 1. College of Biological Science and Biotechnology, Beijing Forestry University, Beijing 100083, China;
    2. College of Biotechnology and Food Science, Bohai University, Jinzhou 121000, China
  • Received:2009-07-08 Revised:2010-03-01 Online:2010-05-01 Published:2010-12-29
  • Contact: ZHANG Bo-lin E-mail:zhangbolin888@126.com

摘要:

利用胃蛋白酶水解乳清蛋白,获得酶解产物的优化工艺条件是pH 值为2.2,水解温度为65℃,底物质量浓度为2g/100mL,酶与底物比为7%,其蛋白水解度为12.51%。乳清蛋白水解物与经过超滤和凝胶过滤后的分离物对嗜酸乳杆菌B 有较好的增殖作用,其中分子量1000D 以下的酶解产物增殖效果最为显著。质谱分析证实该段水解产物是分子量集中在213.2~956.9D 之间的寡肽和氨基酸复合物,可使嗜酸乳杆菌B 活细胞数量提高一个对数级。显然,应用廉价乳清蛋白水解产物作为培养基质可以提高嗜酸乳杆菌B 的细胞数量。

关键词: 乳清蛋白酶解物, 嗜酸乳杆菌B, 增殖

Abstract:

The optimal hydrolysis condition to obtain whey protein hyrolysates was pH 2.2, temperature at 65 ℃, substrate concentration of 2 g/100mL, and ratio between enzyme and substrate of 7%. The degree of hydrolysis (DH) reached up to 12. 51% whey protein. Whey protein hydrolysates and the fragments purified by ultra filtration and gel filtration exhibited an excellent proliferation effect on Lactobacillus acidophilus B. The fragments with molecular mass ranged from 213.2 to 956.9 D could promote this probiotic strain to grow 10 times faster than the control. Therefore, the addition of pepsin-based whey protein hydrolysates in media may be an economic and helpful strategy to improve the proliferation of probiotics.

Key words: whey protein hydrolysate, Lactobacillus acidophilus B, proliferation

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