Acta Veterinaria et Zootechnica Sinica ›› 2019, Vol. 50 ›› Issue (12): 2431-2439.doi: 10.11843/j.issn.0366-6964.2019.12.007

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Cloning of Yak SIRT3 Gene and Its Expression Pattern in Different Tissues and Testis at Different Development Stages

WANG Bin1,2, TONG Lianxin1, QIN Wenchang1,2, LI Jian1,2,3, YIN Shi1,2,3,4*   

  1. 1. College of Life Science and Technology, Southwest Minzu University, Chengdu 610041, China;
    2. Key Laboratory of Ministry of Education for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Chengdu 610041, China;
    3. Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China;
    4. Key Laboratory of Modern Biotechnology of State Ethnic Affairs Commission, Southwest Minzu University, Chengdu 610041, China
  • Received:2019-06-10 Online:2019-12-23 Published:2019-12-20

Abstract: This research was conducted to clone the sirtuin 3 (SIRT3) gene in yak and to identify its expression pattern in various tissues and testis at different development ages, respectively. This research might provide reliable basis for studying the mechanism of SIRT3 in testis development of yak. A total of 12 healthy male yaks (3 in each group) in fetal (5-6 months), calve (1-2 years old), sexual maturity (3-5 years old) and old (7-9 years old) stages were selected. Three samples from the same age were considered as biological duplications. The samples of liver, heart, spleen, lung, brain, kidney, muscle, small intestine, testicle and large intestine were collected from yaks during sexual maturity stage, and testicles were collected from yaks at 4 different development stages, respectively. Total RNAs in different samples were extracted respectively and the coding sequence of yak SIRT3 gene was cloned by reverse transcription PCR(RT-PCR). The structure and function of the protein encoded by SIRT3 gene were predicted by related bioinformatics softwares. The expressions of SIRT3 mRNA in different tissues and testis at 4 different development stages were determined by quantitative real-time PCR (qRT-PCR). The results showed that the ORF(open reading frame) of SIRT3 was 1 002 bp, which encoded 333 amino acids. The sequence of SIRT3 showed 99.9% and 96.7% homology with that of cattle and sheep, respectively. The mRNA of SIRT3 was widely expressed in various tissues of yak, and its expression was relatively higher in spleen, testis, lung and muscle. The expression of SIRT3 mRNA in the testis of yak increased firstly and then decreased with age, with the highest expression in sexual maturity stage. This study provides basic data for revealing the regulation of SIRT3 in yak growth and development, especially in testicular development.

Key words: histone deacetylation, SIRT3, yak, tissue expression pattern, testis

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