ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (5): 719-727.doi: 10.11843/j.issn.0366-6964.2015.05.006

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Construction of MyoD I Promoter Eukaryotic Expression Vector in Guanling Cattle and Its Expression in Mouse C2C12 Cells

HUAN Cong-cong1,2,XU Hou-qiang2* ,CHEN Wei1,2,CHEN Xiang2,ZHAO Jia-fu2,ZHANG Wen2,ZHOU Di2,XIA Dan2   

  1. (1.College of Life Science,Guizhou University,Guiyang 550025,China;2.Key Laboratory of Animal Genetics,Breeding and Reproduction in the Plateau Mountainous Region of Ministry of Education,College of Animal Science,Guizhou University/Guizhou Key Laboratory of Animal Genetics,Breeding and Reproduction,Guiyang 550025,China)
  • Received:2014-07-28 Online:2015-05-23 Published:2015-05-23

Abstract:

The aim of this study was to analyze promoter activity of 4 different lengths MyoD I promoters in Guanling cattle and determine preliminarily the position of the core gene promoter.The relative expression quantity was detected in different tissues of Guanling cattle by real-time quantitative PCR.The DNA extracted from Guanling cattle blood was as a template and the phosphorylated 5'end PCR primers was designed to amplify 4 different lengths MyoD I promoters in Guanling cattle,ultimately accurately replaced the CMV region of pEGFP-N3 vector and got eukaryotic expression vector pEGFP-N3-MyoD I.Then the recombinant plasmid was transiently transfected into mouse C2C12 cells by liposome method.The aim was to verify promoter activity of MyoD I promoter by Luminous intensity of mouse C2C12 cells.The expression level of MyoD I gene was the highest in muscle,the fragment was inserted into an expression vector,the recombinant plasmid could be successfully expressed in mouse C2C12 cells with green fluorescence under the excitation light.In this study,eukaryotic expression vector pEGFP-N3-MyoD I is successfully constructed,4 promoters constructed show promoter activity,expression quantity of P3 promoter is the highest,so P3 promoter is regarded as the core promoter of MyoD I gene.

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