ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (8): 1229-1235.doi: 10.11843/j.issn.0366-6964.2013.08.008

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The Expression and Tyrosine Phosphorylation of Sperm Protein 32 Regulate the Activation of the Boar Proacrosin/Acrosin System

SUN Pei-liang, CUI Ming-xun, JIANG Yuan-yuan, CAO Li-peng, JIN Yi*   

  1. (Agricultural College of Yanbian University Yanji 133002 China)
  • Received:2012-12-28 Online:2013-08-23 Published:2013-08-23

Abstract:

The aim of this study was to investigate the relationship between the expression level,tyrosine phosphorylation of sp32 and the activation of the boar proacrosin/acrosin system, the acrosomal membrane proteins of boar sperm for different treatments (fresh sperm, freezing-thawing, capacitation, acrosome reaction) were separated, and stained by CBB, assayed using SDS-PAGE and Western blot analysis. The results showed that the expression level of sp32 was different in conversion of proacrosin/acrosin system after treatment of boar sperm capacitation, freezing-thawing and acrosome reaction, the expression of sp32 in experiment groups of capacitation and acrosome reaction were slightly higher than the freezing-thawing experiment group, and significantly higher than that of fresh semen group. The level of sp32 tyrosine phosphorylation had a significant difference between the freezing and thawing experiment group and other experiment groups. But bands with molecular mass of 38-170 ku in the fresh semen group were more obvious; it showed that the acrosomal membrane proteins were accompanied by modification and degradation of big molecular proteins when sperm underwent capacitation and the acrosome reaction. sp32 as a proacrosin binding protein, its expression and tyrosine phosphorylation level were up-regulated in the activation of the boar proacrosin/acrosin system.

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