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BSP A1/A2-like proteins in ram seminal plasma
M I M Jobim1, E R Oberst, C G Salbego
1Department of Veterinary Clinical Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil. ines.jobim@ufrgs.br
Theriogenology
|April 13, 2005
Summary
This study characterized ovine seminal plasma proteins using 2D-PAGE, identifying 21 distinct spots. Western blot analysis confirmed the presence of proteins similar to bovine BSP A1/A2 in ram seminal plasma.
Area of Science:
- Reproductive Biology
- Proteomics
- Animal Science
Background:
- Seminal plasma proteins play crucial roles in sperm function and fertility.
- Understanding the protein composition of ovine seminal plasma is essential for reproductive studies.
Purpose of the Study:
- To investigate the protein profile of ovine seminal plasma.
- To determine the presence of Bul-like seminal plasma proteins A1/A2 (BSP A1/A2) in ovine seminal plasma.
Main Methods:
- Ovine seminal plasma was collected from mature rams.
- Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) was employed to separate proteins.
- Western blot analysis using polyclonal antibodies was performed to identify specific proteins.
Main Results:
- 2D-PAGE revealed 21 protein spots with molecular weights ranging from 15 to 115 kDa and pI from 3.2 to 8.7.
- Prominent protein spots were observed below 30 kDa, with spots 3, 5, and 7 accounting for 41.1% of the total intensity.
- Western blot analysis showed that spots 3 and 5 reacted with antibodies against BSP A1/A2, indicating their presence in ovine seminal plasma.
Conclusions:
- Ovine seminal plasma possesses a complex protein profile.
- Proteins analogous to bovine BSP A1/A2 are present in ovine seminal plasma, suggesting conserved functions in mammalian reproduction.