食品科学 ›› 2012, Vol. 33 ›› Issue (1): 77-80.doi: 10.7506/spkx1002-6630-201201015

• 基础研究 • 上一篇    下一篇

牛初乳中富脯氨酸多肽的纯化与鉴定

余 芳1,李德龙1,张 波1,高艳玲1,张少辉1,2,*   

  1. 1.上海交通大学农业与生物学院,上海 200240;2.上海交通大学陆伯勋食品安全中心,上海 200240
  • 收稿日期:2011-01-24 修回日期:2012-01-09 出版日期:2012-01-15 发布日期:2012-01-12
  • 通讯作者: 张少辉 E-mail:yuflili@163.com

Purification and Identification of Proline-rich Polypeptides from Bovine Colostrum

YU Fang1,LI De-long1,ZHANG Bo1,GAO Yan-ling1,ZHANG Shao-hui1,2,*   

  1. 1. School of Agriculture and Biology, Shanghai JiaoTong University, Shanghai 200240, China;
    2. Luh Bor. S. Research Center for Food Safety, Shanghai JiaoTong University, Shanghai 200240, China
  • Received:2011-01-24 Revised:2012-01-09 Online:2012-01-15 Published:2012-01-12
  • Contact: Shao-Hui ZHANG E-mail:yuflili@163.com

摘要:

以牛初乳为原料,提取分离具有生物活性的富脯氨酸多肽(proline-rich polypeptides,PRP),并从氨基酸组成、分子质量大小和反相色谱方面对其进行测定和分析。结果表明:分离所得多肽脯氨酸含量高达20%;SDS-PAGE显示主成分分子质量分布范围在5~25kD;反相色谱主要谱峰在乙腈体积分数37%~45%处洗脱,在这一体积分数范围内可得到纯度高达96.7%的富脯氨酸多肽。

关键词: 富脯氨酸多肽, 分子量, 氨基酸组成, 反相色谱

Abstract:

Bovine colostrum was extracted to obtain bioactive proline-rich polypeptides (PRP). The molecular weight and amino acid composition of PRP were analyzed by means of SDS-PAGE and an automated amino acid analyzer, respectively. Reversed-phase high performance liquid chromatography (RP-HPLC) was employed to purify PRP. The results showed that the proline content in PRP was as high as 20%. The molecular weights of principal components were in the range of 5-25 kD as determined by SDS-PAGE. RP-HPLC showed that major spectral peaks were eluted by 37%-45% acetonitrile. As a result, PRP with a purity of 96.7% was obtained.

Key words: proline-rich polypeptide, molecular weight, amino acid composition, reversed-phase chromatography

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