›› 2019, Vol. 46 ›› Issue (6): 1730-1738.doi: 10.16431/j.cnki.1671-7236.2019.06.020

• Genetics and Breeding • Previous Articles     Next Articles

Transcriptional Regulation Analysis of Porcine SEPW1 Gene

ZHANG Feng1, LI Xin2, CHEN Mingxin1   

  1. 1. Hubei Key Laboratory of Animal Embryo Engineering and Molecular Breeding, Institute of Animal Husbandry and Veterinary, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
    2. College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2018-10-15 Online:2019-06-20 Published:2019-06-19

Abstract:

This study was aimed to clone the potential promoter region of porcine SEPW1 gene and analyze its transcriptional activity,obtain its core promoter region,and analyze the effect of transcription factor SP1 on the transcriptional activity of SEPW1 gene for further studying the function of porcine SEPW1 gene in meat traits.The expression level of SEPW1 gene in Large White pigs tissues was detected by Real-time quantitative PCR,and the spatial expression profile was constructed.6 SEPW1 gene promoter deletion fragments were cloned by PCR,and 6 dual luciferase reporter vectors were constructed,the core promoter region of SEPW1 gene was obtained by detecting the dual luciferase activity of each vector;The potential transcription factor SP1 binding site was predicted through bioinformatics analysis of the core promoter region.The transcription factor SP1 binding site and its effect on the transcriptional activity of SEPW1 gene were confirmed by over-expression,down-expression,site-directed mutation and EMSA.The results showed that SEPW1 gene was widely expressed in 12 tissues of 4-month-old Large White pigs,while the expression levels were higher in castrocnemius and heart.The results of dual luciferase activity indicated that there was the core promoter region of SEPW1 gene 5'-flanking region at -443 to -231 bp,and there was a potential SP1 binding site at -378 to -306 bp.The results of over-expression and down-expression of SP1 gene indicated that transcription factor SP1 promoted the transcription of SEPW1 gene.Site-directed mutagenesis and EMSA assay confirmed that transcription factor SP1 could directly bind to SP1 binding sites (-348 to -339 bp) in the promoter region of SEPW1 gene.The results suggested that transcription factor SP1 could directly target the promoter region of SEPW1 gene and promote SEPW1 gene transcription.

Key words: porcine; SEPW1 gene; SP1; promoter; transcriptional activity

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