天然产物研究与开发 ›› 2016, Vol. 28 ›› Issue (Suppl1): 87-92.doi: 10.16333/j.10016880.2016.S.022

• 开发研究 • 上一篇    下一篇

胰酶水解牦牛乳水解乳蛋白理化性质的初步分析

靳冬武1,2,李明生1,3,张健2,龙仕和3,张磊2,冯玉萍1,2,李倬1,2,魏锁成2,马忠仁1,2,3*   

  1. 1西北民族大学 生物工程与技术国家民委重点实验室;2西北民族大学生命科学与工程学院;3甘肃省动物细胞工程技术研究中心,兰州 730030
  • 出版日期:2016-06-30 发布日期:2017-03-02

Pancreatin Hydrolysis Yak Casein and Priliminary Analysis of Physicochemical Property of Lactoalbumin Hydrolysate

JIN Dongwu1,2,LI Mingsheng1,3,ZHANG Jian2,LONG Shihe3,ZHANG Lei2, FENG Yuping1,2,LI Zhuo1,2,WEI Suocheng2,MA Zhongren1,2,3*   

  1. 1The Key Bioengineering and Technology Laboratory of Nationality Commission Northwest University 
    For Nationalities;2 Life Science and Engineering College of Northwest University for Nationalities;
    3Engineering Technology Research Center for Animal Cell Gansu,Lanzhou 730030,China
  • Online:2016-06-30 Published:2017-03-02

摘要: 水解乳蛋白(Lactoalbumin hydrolysate,LH)作为复合生物活性肽,在食品营养和生物制药领域中有着广泛的应用。本文采用胰酶水解牦牛乳酪蛋白(Yak Casein,YC)得到牦牛乳水解乳蛋白(Yak casein lactoalbumin hydrolysate,YCLH),并通过SDS聚丙烯酰胺凝胶电泳(SDSPAGE)、扫描电镜(SEM)、红外光谱(FTIR)、X射线衍射(XRD)以及离子交换色谱法(IEC)对YCLH的理化性质进行了分析。结果表明:用胰酶在温度40 ℃,pH 7.5,酶与底物比例为1:5的条件下水解YC 4 h后所得的YCLH与Hyclone水解乳蛋白(Hyclone lactoalbumin hydrolysate,HLH)相比较,有19种相同的氨基酸,总含量分别为46.202±2.263%和24.04±0.768%,差异极显著(P<0.01);两者均没有大分子蛋白,形态结构属于矩阵型,二级结构主要以α螺旋和β转角结构存在,并含有蛋白质(amid I)、羧基、纤维素、核酸、脂类、多糖。综上可知,该水解方法简单,耗时短,易于产业化,YCLH与HLH的理化性质极其相似,这为牦牛乳酪蛋白的进一步开发利用和水解乳蛋白国产化提供了科学理论的依据。

关键词: 胰酶, 牦牛乳酪蛋白, 理化性质, 水解乳蛋白

Abstract: LH,which as compound bioactive peptide,has a wide range of applications in food nutrranceutical and biopharmaceuticals.The study using pancreatin hydrolysised YC to prepare YCLH.The physicochemical property of YCLH was investigated by SDSPAGE,SEM,FTIR,XRD and IEC.The results showed that the pancreatin add to YC with ratio of 1:5 to prepare YCLH under 40 ℃,pH 7.5 for 4 h.Consistent with HLH,there were 19 kinds of amino acids,the contents of total amino acids were 46.202±2.263% and 24.04±0.768%,the difference was extremely significant (P<0.01).There were no macromolecular protein,belong to matrix morphology,secondary structure were mainly existed in αhelix and βturns,contain protein (amid I),carboxyl,cellulose,nucleic acids,lipids and polysaccharide.In conclusion,this method is simple,time saving,feasibility to be industrialized,the physicochemical property of YCLH and HLH is extremely similar.The study can be served as a scientific basis for the further exploitation and utilization of the YC and the Localization of the LH.

Key words: pancreatin, yak casein, physicochemical property, lactoalbumin hydrolysate

中图分类号: 

Q814.9