食品科学

• 基础研究 • 上一篇    下一篇

降胆固醇黑豆肽的分离纯化与结构鉴定

刘恩岐1,2,李 华1,*,巫永华2,高兆建2,张建萍2   

  1. 1.西北农林科技大学葡萄酒学院,陕西 杨凌 712100;
    2.徐州工程学院 江苏省食品资源开发与质量安全重点建设实验室,江苏 徐州 221008
  • 发布日期:2013-09-27
  • 通讯作者: 李 华

Isolation and Identification of Hypocholesterolemic Peptide Derived from Black Soybean Protein

LIU En-qi1,2,LI Hua1,*,WU Yong-hua 2,GAO Zhao-jian2,ZHANG Jian-ping2   

  1. 1. College of Enology, Northwest A&F University, Yangling 712100, China;2. Jiangsu Key Laboratory of Food Resource
    Development and Quality Safety, Xuzhou Institute of Technology, Xuzhou 221008, China
  • Published:2013-09-27
  • Contact: LI Hua

摘要:

通过超滤与大孔树脂吸附分离黑豆蛋白酶解产物,获得降胆固醇活性较强的黑豆肽组分,采用凝胶过滤色谱(GFC)、反相高效液相色谱(RP-HPLC)与排阻色谱(SEC)对黑豆肽粗品进行纯化,得到高纯度的降胆固醇肽,经Edman降解、N端测序对降胆固醇黑豆肽一级结构进行分析鉴定,其氨基酸组成序列为Ala-Phe-Pro-Lys-Asp,相对分子质量为576,肽链中具有特定的疏水区域,且Pro位于N端之外的重要位点。

关键词: 黑豆肽, 降胆固醇, 分离, 结构鉴定

Abstract:

Black soybean peptides (BSPs) with strong hypocholesterolemic activity were purified from black soybean
protein hydrolysates by using ultrafiltration (UF) and macroporous adsorption resin (MAR), and further purified using
Sephadex G-25 column, reversed phase high-performance liquid chromatography (RP-HPLC) and size exclusion
chromatography (SEC). The amino acid sequence of the peptide with the strongest hypocholesterolemic activity was
confirmed as Ala-Phe-Pro-Lys-Asp by automated Edman degradation in a protein sequencer, and its relative molecular mass
was determined to be 576 D. In addition, a specific hydrophobic domain in the sequence was observed, and Pro was located
in an important region except the N-terminus.

Key words: black soybean peptides, hypocholesterolemic activity, isolation, structural analysis

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