Biotechnology Bulletin ›› 2023, Vol. 39 ›› Issue (3): 311-320.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0967

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Cloning, Tissue Expression Profile and Function Prediction of GPX3 Gene in Tibetan Chicken

CHEN Chu-wen1,2(), LI Jie1,2, ZHAO Rui-peng1, LIU Yuan1,2, WU Jin-bo3, LI Zhi-xiong1,2()   

  1. 1. Key Laboratory of Ministry of Education for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Southwest Minzu University, Chengdu 610041
    2. College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu 610041
    3. Institute of Science and Technology of Aba Tibetan and Qiang Autonomous Prefecture, Aba 624402
  • Received:2022-08-02 Online:2023-03-26 Published:2023-04-10

Abstract:

The aim is to clone and have bioinformatics analysis of GPX3 gene in Tibetan chickens, to detect its expressions in different tissues, and to identify the mRNA expressions of GPX3 interacting proteins and analyse their correlations for laying the foundation for further exploring the effect of GPX3 gene on immune function in Tibetan chickens. In this experiment, having 70-day-old healthy Tibetan chickens as study material, RT-PCR was applied to clone the CDS sequence of GPX3 gene and to perform the biological analysis. Real-time fluorescent quantitative PCR(qPCR)was used to detect the expression differences of GPX3 gene in the hearts, livers, spleens, lungs and kidneys of Tibetan chickens, and to analyze the mRNA expressions of 10 related proteins that may interact with GPX3 protein in spleen. A full length of 799 bp GPX3 gene sequence was cloned successfully, including 78 bp of 5' UTR, 660 bp of CDS, and 61 bp of 3' UTR, encoding 219 amino acids. GPX3 mRNA was expressed in 5 tissues of Tibetan chickens, and the highest in the spleen, predicting that the result of the highest expression of GPX3 in the spleen might be related to this protein immune function. GPX3 protein showed a highly and significantly positive correlation with the predicted reciprocal protein SOD2, suggesting that GPX3 might play an important role in drug resistance and reproductive regulation. A 660 bp CDS of GPX3 gene was cloned successfully in this study, predicting that it might be highly significantly and positively correlated with SOD2. This study may provide a theoretical basis for further understanding the role of the antioxidant function of GPX3 gene in the immune mechanism of Tibetan chickens.

Key words: Tibetan chicken, GPX3, clone, tissue expression profile, function prediction