China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (2): 405-415.doi: 10.16431/j.cnki.1671-7236.2022.02.001

• Biotechnology • Previous Articles     Next Articles

Cloning, Promoter Analysis and Transcriptional Regulation of p21 Gene in Goose

CHEN Zhe1,2, YANG Pengxia1,2, LEI Mingming1,2, CHEN Jiabin3, YAN Leyan1,2   

  1. 1. Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
    2. Key Laboratory of Protected Agriculture Engineering in the Middle and Lower Reaches of Yangtze River, Ministry of Agriculture and Rural Areas, Nanjing 210014, China;
    3. Taizhou City Jinpeng Geese Professional Cooperative, Taizhou 225319, China
  • Received:2021-09-01 Online:2022-02-05 Published:2022-01-27

Abstract: 【Objective】 The aim of this study was to analyze the structure and promoter activity of p21 gene in goose, and investigate the transcriptional regulation mechanism.【Method】 The Taizhou goose was taken as the research object, the sequence characteristics of the full-length and 5′-flanking region of p21 gene were obtained using homologous amplification, RACE and biological analysis.The dual luciferase reporter vectors with 6 different deletion fragments of the promoter were constructed, its luciferase activities were analyzed, and the core promoter region of p21 gene was identified.Site-directed mutagenesis of the transcription factor binding sites MyoD (+25 to +36 bp) in the core promoter region was carried out, and the key transcription factors of p21 gene was preliminary identified in C2C12 cell line.【Result】 The full cDNA sequence of p21 gene in goose was 1 943 bp, containing 453 bp coding regions (CDS) which encoded 151 amino acids.p21 protein sequence had highly conserved CDI family binding sites.Phylogenetic tree analysis showed that p21 gene in goose was closely related to Anas platyrhynchos, and had a particularly strong evolutionary relationship with Gallus gallus and Meleagris gallopavo.The 5′-flanking region of p21 gene contained promoter elements, the core promoter was found to be located at —35 to +37 bp, which played a positive regulatory effect.Combined with site-directed mutation demonstrated that MyoD was the key transcription factor of p21 gene in goose.【Conclusion】 The complete cDNA sequence and promoter region of p21 gene in goose were obtained, and MyoD was the key transcription factor.The results provided a theoretical basis for exploring molecular regulation mechanism of p21 gene in embryonic muscle development of goose.

Key words: goose; p21 gene; cloning; promoter activity; transcriptional regulatory element

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