Research Article

A novel splice variant of the bovine GALNTL5 gene identified in Chinese Holstein bull testis tissue and its mRNA expression

Published: April 28, 2016
Genet. Mol. Res. 15(2): gmr7723 DOI: https://doi.org/10.4238/gmr.15027723
Cite this Article:
H. Li, Q. Jiang, Z.H. Ju, J.M. Huang, X.G. Wang, C.H. Yang, Y. Sun, G.W. Yang, J.F. Zhong, C.F. Wang, H. Li, Q. Jiang, Z.H. Ju, J.M. Huang, X.G. Wang, C.H. Yang, Y. Sun, G.W. Yang, J.F. Zhong, C.F. Wang, H. Li, Q. Jiang, Z.H. Ju, J.M. Huang, X.G. Wang, C.H. Yang, Y. Sun, G.W. Yang, J.F. Zhong, C.F. Wang (2016). A novel splice variant of the bovine GALNTL5 gene identified in Chinese Holstein bull testis tissue and its mRNA expression. Genet. Mol. Res. 15(2): gmr7723. https://doi.org/10.4238/gmr.15027723
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Abstract

The polypeptide N-acetylgalactosaminyltransferase-like protein 5 (GALNTL5) is a newly identified protein that is specifically expressed in testis tissue and participates in spermatogenesis. In this study, we characterized a novel bovine GALNTL5 splice variant, designated as GALNTL5-AS, by using real-time polymerase chain reaction (RT-PCR) and clone sequencing methods. The novel GALNTL5 isoform was derived from the complete transcript, GALNTL5-complete, via alternative splicing (AS). The pattern of the splice variant was exon skipping. Bovine GALNTL5 transcripts were expressed in the testis, as demonstrated by RT-PCR. The expression levels of both transcripts were higher in adult testes than in calf testes (P < 0.05). In addition, prediction analysis showed that the GALNTL5-AS transcript only encoded 122 amino acids and lost its glycosyltransferase 1 and Gal/GalNAc-T motifs, which may result in a dysfunctional protein compared with the predominant transcript GALNTL5-complete. This study improves our understanding of the bovine GALNTL5 gene function during bull sperm formation.

The polypeptide N-acetylgalactosaminyltransferase-like protein 5 (GALNTL5) is a newly identified protein that is specifically expressed in testis tissue and participates in spermatogenesis. In this study, we characterized a novel bovine GALNTL5 splice variant, designated as GALNTL5-AS, by using real-time polymerase chain reaction (RT-PCR) and clone sequencing methods. The novel GALNTL5 isoform was derived from the complete transcript, GALNTL5-complete, via alternative splicing (AS). The pattern of the splice variant was exon skipping. Bovine GALNTL5 transcripts were expressed in the testis, as demonstrated by RT-PCR. The expression levels of both transcripts were higher in adult testes than in calf testes (P GALNTL5 gene function during bull sperm formation.