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

• Animal Science • Previous Articles     Next Articles

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

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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