浙江农业学报 ›› 2020, Vol. 32 ›› Issue (7): 1155-1159.DOI: 10.3969/j.issn.1004-1524.2020.07.03

• 动物科学 • 上一篇    下一篇

奶牛乳脂性状候选基因EEF1D突变位点功能分析

蒋秋斐1,2, 蔡正云1, 黄增文1, 冯小芳1, 张娟1, 顾亚玲1,*   

  1. 1.宁夏大学 农学院,宁夏 银川 750021;
    2.宁夏回族自治区畜牧工作站,宁夏 银川 750004
  • 收稿日期:2019-07-29 出版日期:2020-07-25 发布日期:2020-07-28
  • 通讯作者: *顾亚玲,E-mail:guyaling@sina.com
  • 作者简介:蒋秋斐(1987—),女,宁夏银川人,博士研究生,畜牧师,研究方向为动物遗传育种与繁殖。E-mail:jiangqiufei@163.com
  • 基金资助:
    宁夏大学科学研究基金(ZR1725); 宁夏回族自治区农业育种专项(2019NYYZ05)

Functional analysis of EEF1D mutation site in dairy cow milk fat traits candidate gene

JIANG Qiufei1,2, CAI Zhengyun1, HUANG Zengwen1, FENG Xiaofang1, ZHANG Juan1, GU Yaling1,*   

  1. 1. School of Agriculture, Ningxia University, Yinchuan 750021, China;
    2. Animal Husbandry Station of Ningxia, Yinchuan 750004, China
  • Received:2019-07-29 Online:2020-07-25 Published:2020-07-28

摘要: 提高乳脂含量、提升奶质已成为当前奶牛业研究的重点方向之一。前期经GWAS方法研究发现,EEF1D基因5'非翻译区(5'-UTR)的G/A突变与乳脂率极显著相关,为了进一步对候选基因EEF1D的突变位点进行功能分析,首先通过人工合成获得了EEF1D基因突变型与野生型片段,并在细胞水平上对其开展了功能验证实验。研究发现,EEF1D基因5'-UTR的G/A突变引起Sp3转录起始位点后移33 bp,并且突变型的活性大约是野生型的3倍。研究结果表明,该突变可改变转录因子的转录起始位点,从而使EEF1D的表达上调。

关键词: 乳脂含量, EEF1D基因, 5'非翻译区(5'-UTR), Sp3, 突变型

Abstract: Increasing milk fat content and improving milk quality have become one of the key research directions in the dairy industry. In the previous study, the G/A mutation in the 5'-untranslated region (5'-UTR) of EEF1D gene was significantly correlated with the milk fat percentage. In order to further analyze the functional site of the candidate gene EEF1D, the EEF1D gene mutant and wild-type fragments were obtained by artificial synthesis, and functional verification experiments were carried out at the cellular level. This study found that the G/A mutation of the 5'-UTR of the EEF1D gene caused a 33 bp shift in the Sp3 transcription initiation site, and the activity of the mutant was about three times that of the wild type. These findings indicated that this mutation can alter the transcription initiation site of the transcription factor, thereby up-regulating the expression of EEF1D.

Key words: milk fat content, EEF1D gene, 5' untranslated region (5'-UTR), Sp3, mutant

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