ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (7): 1075-1083.doi: 10.11843/j.issn.0366-6964.2014.07.007

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Clone,Bioinformatics Analysis and Expression Characteristics of Ovine GPx5

ZHANG Chun-xiang1,GUO Yun-yan1,BAI Yuan-sheng2,YANG Zi-sen2,ZHANG Guo-lin1,JIAO Guang-yue2,REN You-she1*   

  1. (1.College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Taigu 030801,China;2.Shanxi Ecological Animal Husbandry Management Centre,Taiyuan 030002,China)
  • Received:2014-01-22 Online:2014-07-23 Published:2014-07-23

Abstract:

The aim of this study was to clone ovine GPx5 (Selenium-independent glutathione peroxidase 5),and predict the structure and function of GPx5 protein,and investigate its expression and location characteristics in ovine testis and epididymis caput.The ovine GPx5 was cloned by 5′RACE and RT-PCR.The structure,characteristics and function of ovine GPx5 protein were analyzed by bioinformatics methods.The expression characteristics were detected by immunohistochemistry assays in ovine testis and epididymis caput,as well as by Western blotting assays in seminal plasma.The results showed GPx5 gene (GenBank accession No.:JQ 320282) contained an 660 bp open reading frame,which coded 219aa with molecular weight of 25 ku.Its potential signal peptide was 1-21aa.The domain structure of tertiary structure was alpha/beta structure.There were 11 potentail phosphorylation sites predicted and 7 conserved and specific phosphokinase binding sites.The prediction results of InterProScan showed 38-151aa were the conserved protein domain of GSHPx family and 36-121aa was the conserved protein domain of thioredoxin-like superfamily.GPx5 protein was essentially presented in pseudostratified columnar epithelium,and poorly presented in epithelium of the ovine epididymis and Leydig cell of ovine testis,and also presented in fluid of epididymis caput and seminal plasma in rams.Ovine GPx5 protein was secreted,which had a GPx activity and function of thioredoxin-like.GPx5 could be as a mediator of signaling pathway and need be tested by further research.

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