Phosphorylation of xEIAP/XLX in Xenopus Eggs
Author Information
Author(s): Tsuchiya Yuichi, Yamashita Shigeru
Primary Institution: Toho University School of Medicine
Hypothesis
We tested whether xEIAP/XLX might be phosphorylated in cytostatic factor-arrested egg extracts.
Conclusion
xEIAP/XLX is physiologically phosphorylated by p42MAPK in Xenopus unfertilized eggs, but it may not be a direct mediator of p42MAPK-dependent anti-apoptotic activity.
Supporting Evidence
- p42MAPK was identified as the major kinase phosphorylating xEIAP/XLX.
- Three Ser residues (Ser 235/251/254) were identified as phosphorylation sites.
- Phosphorylation did not significantly alter the stability or anti-apoptotic ability of xEIAP/XLX.
Takeaway
Scientists studied a protein called xEIAP/XLX in frog eggs to see if it gets changed by a process called phosphorylation, which helps the eggs stay alive longer.
Methodology
The study involved examining the phosphorylation of xEIAP/XLX in egg extracts and testing various mutants to assess the effects of phosphorylation.
Limitations
The study does not address the long-term effects of xEIAP/XLX phosphorylation on egg viability.
Digital Object Identifier (DOI)
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