Abstract
Bull sperm plasma and outer acrosomal membranes were analyzed by SDS-PAGE. Analysis of the plasma membrane proteins revealed the presence of a 70 kDa band the prominence of which is enhanced after capacitation. This protein was found to bind to zona pellucida intact oocytes. PAGE analysis of outer acrosomal membrane proteins also reveals the presence of a 70 kDa band, but its prominence decreases after capacitation. This protein also binds to zona pellucida intact oocytes. Futhermore, the 70 kDa outer acrosomal membrane protein is recognized in Western blot analysis by antibodies to plasma membrane proteins and vice versa. The results indicate that the 70 kDa acrosomal and plasma membrane proteins are the same. This 70 kDa protein would thus be a zona pellucida binding protein which is initially stored in the outer acrosomal membrane and transferred to the plasma membrane during capacitation, enabling it to function in egg-sperm binding.
| Original language | English |
|---|---|
| Pages (from-to) | 98-102 |
| Number of pages | 5 |
| Journal | FEBS Letters |
| Volume | 357 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2 Jan 1995 |
Bibliographical note
Funding Information:Acknowledgements." This work was supported in part by grants from the Pollack and Ihel Foundations to H.B.
Funding
Acknowledgements." This work was supported in part by grants from the Pollack and Ihel Foundations to H.B.
| Funders | Funder number |
|---|---|
| Pollack and Ihel Foundations |
Keywords
- Cell recognition
- Fertilization
- Membrane remodelling
- Ova
- Protein trafficking
- Sperm