湖北农业科学 ›› 2021, Vol. 60 ›› Issue (7): 103-105.doi: 10.14088/j.cnki.issn0439-8114.2021.07.019

• 畜牧·兽医 • 上一篇    下一篇

猪乳中两种蛋白质的质谱鉴定

越安琪1, 罗卉卉1, 黄卫平2, 陈登权1, 金素钰1, 黄林1, 郑玉才1   

  1. 1.西南民族大学生命科学与技术学院,成都 610041;
    2.四川省凉山州畜牧兽医研究所,四川 西昌 615400
  • 收稿日期:2020-07-10 出版日期:2021-04-10 发布日期:2021-04-25
  • 通讯作者: 郑玉才,教授,主要从事泌乳生物学、生化与分子遗传学研究,(电子信箱)yucaizheng65@hotmail.com。
  • 作者简介:越安琪(1998-),女,内蒙古鄂尔多斯人,在读本科生,研究方向为生物技术,(电话)18648038886(电子信箱)850803463@qq.com。
  • 基金资助:
    国家级大学生创新创业项目(201810656106)

Identification of two milk proteins of sow by mass spectrometry

YUE An-qi1, LUO Hui-hui1, HUANG Wei-ping2, CHEN Deng-quan1, JIN Su-yu1, HUANG Lin1, ZHENG Yu-cai1   

  1. 1. College of Life Science and Technology, Southwest Minzu University, Chengdu 610041,China;
    2. Liangshan Animal Husbandry and Veterinary Research Institute, Xichang 615400, Sichuan,China
  • Received:2020-07-10 Online:2021-04-10 Published:2021-04-25

摘要: 为鉴定猪乳中的蛋白质组分,研究采集了8头大白猪的全乳,经离心脱脂后,采用SDS-PAGE对脱脂乳中的蛋白质进行分离,然后切取凝胶上的3条蛋白质条带,经还原烷基化和胰蛋白酶解处理后,采用液相色谱-串联质谱分析产生的水解肽,以鉴定这3种低分子量蛋白质。结果表明,获得鉴定的2种蛋白质包括β-乳球蛋白(β-LG)和乳清酸蛋白(WAP),其中WAP可能对猪乳的生物学功能有重要价值。

关键词: 猪, 乳, 蛋白质鉴定, 质谱

Abstract: In order to identify several protein components of porcine milk, whole milk samples of large white pigs (n=8) were collected, and skim milk was obtained by centrifugation. SDS-PAGE was employed to separate skim milk proteins, and tree protein bands on SDS-gel were cut off, followed by treatments of reductive alkylation and trypsin digestion. The resulting peptides were loaded on LC-MS/MS to identify the three proteins with low molecular weight. Two proteins including β-lactoglobulin (β-LG) and whey acidic protein (WAP) were identified successfully. WAP may probably affect porcine milk functions.

Key words: sow, milk, protein identification, mass spectrometry

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