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| Clone of STAG3 Gene and Its Expression and Localization in Yak (Bos grunniens) Testis with Different Ages |
| SHI Jun1,3, CHEN Wen-Li1,3, BAI Xu1,3, LI Jian-Fu1,3, YUAN Bao1,3, ZHAO Xing-Xu1,2,3, ZHANG Quan-Wei1,2,3,* |
1 College of Life Science and Biotechnology, Gansu Agricultural University, Lanzhou 730070, China;
2 College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China;
3 Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, China |
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Abstract Stromal antigen 3 (STAG3), one component of adhesin complexes, plays important role in regulation of follicular development, premature ovarian failure and carcinogenesis in animals. However, its function and regulatory mechanisms are incompletely understood in yak (Bos grunniens). In the present study, the yak testicular tissues with different ages (2, 4, 6 and 8 years old) were collected. The coding sequence (CDS) of STAG3 gene was cloned using reverse transcription-PCR (RT-PCR). The interacted proteins and biological functions of STAG3 were predicted using STRING (functional protein association networks) and Gene Ontology (GO) procedures. Histomorphological structure of yak tissues was observed using hematoxylin-eosin (HE) staining. The localization and expression pattern analysis of STAG3 were evaluated using immunohistochemical (IHC) staining and qRT-PCR. The results showed that the CDS of yak STAG3 was 3 679 bp with a 1 659 bp open reading frame, and encoding 552 amino acids without transmembrane structure region. STAG3 might involve in the meiosis Ⅰ phase, synaptic re-combination and chromosome concentration. The STAG3 protein was widely expressed in testicular tissues, and were located mainly in primary spermatocyte and secondary spermatocyte. The highest expression level of STAG3 was presented in the yak testis of 2 years old, and was gradually decreased with ages. In conclusion, STAG3 was conservative in animal evolution, and widely expressed in the yak testises, which might play an important role in yak reproductive processes. This study provides basis for uncovering the function and mechanism of STAG3 in yak reproduction.
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Received: 16 December 2022
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Corresponding Authors:
*zhangqw@gsau.edu.cn
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