食品科学 ›› 2020, Vol. 41 ›› Issue (22): 148-157.doi: 10.7506/spkx1002-6630-20190926-319

• 生物工程 • 上一篇    下一篇

驼乳蛋白α-淀粉酶抑制活性肽的制备与鉴定

苏娜,伊丽,吉日木图   

  1. (1.内蒙古农业大学 乳品生物技术与工程教育部重点实验室,内蒙古 呼和浩特 010018;2.内蒙古骆驼研究院,内蒙古 阿拉善 750306)
  • 出版日期:2020-11-25 发布日期:2020-11-26
  • 基金资助:
    内蒙古农业大学高层次人才引进科研启动项目(NDYB2018-48;NDYB2017-28); 内蒙古农业大学“双一流”学科创新团队建设人才培育项目(NDSC2018-14); 内蒙古自治区科技创新引导项目(KCMS2018048);内蒙古自然科学基金项目(2018BS03017)

Preparation and Identification of α-Amylase Inhibitory Peptides from Camel Milk Protein

SU Na, YI Li, Jirimutu   

  1. (1. Key Laboratory of Dairy Biotechnology and Bioengineering, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Inner Mongolia Institute of Camel Research, Alxa 750306, China)
  • Online:2020-11-25 Published:2020-11-26

摘要: 利用碱性蛋白酶和木瓜蛋白酶对驼乳蛋白进行水解,对其酶解工艺、α-淀粉酶抑制活性、氨基酸组成、分子质量分布以及肽段序列进行比较研究,以期获得高活性的α-淀粉酶抑制活性肽。结果表明,酶解可提高驼乳蛋白的α-淀粉酶抑制作用。相对于碱性蛋白酶,在木瓜蛋白酶用量4%、酶解温度55 ℃、酶解pH 7.0、酶解时间2 h的最佳工艺条件下,水解驼乳蛋白获得的多肽具有更高的α-淀粉酶抑制活性。肽序列分析显示碱性蛋白酶和木瓜蛋白酶水解驼乳蛋白制备的多肽分别鉴定出110 种和69 种肽段,其中IPLPLPLPLP和LPLPLPLR为最有效的α-淀粉酶抑制活性肽。因此,驼乳蛋白可以成为功能性食品或保健品中控制糖尿病有效成分的潜在来源。

关键词: 驼乳蛋白;酶解;生物活性肽;α-淀粉酶抑制活性;鉴定

Abstract: In this study, alcalase and papain were separately used to hydrolyze camel milk protein, and the hydrolysis process, α-amylase inhibitory activity, amino acid composition, molecular mass distribution and peptide sequence were comparatively investigated so as to obtain peptides with strong α-amylase inhibitory activity. The results showed that the α-amylase inhibitory activity of camel milk protein was enhanced after enzymatic hydrolysis. Compared with that obtained using alcalase (JX), the protein hydrolysate (MG) prepared using papain under the following optimum conditions: enzyme dosage, 4%; temperature, 55 ℃; pH, 7.0; and hydrolysis time, 2 h possessed higher α-amylase inhibitory activity. A total of 110 and 69 peptides were identified from JX and MG, respectively, of which IPLPLPLPLP and LPLPLPLR were the most effective α-amylase inhibitory peptides. Therefore, camel milk protein can be a potential source of anti-diabetes ingredients in functional foods or health products.

Key words: camel milk protein; enzymatic hydrolysis; bioactive peptides; α-amylase inhibitory activity; identification

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