Mdm2 and FOXO4 Interaction and Ubiquitination
Author Information
Author(s): Brenkman Arjan B., de Keizer Peter L. J., van den Broek Niels J. F., Jochemsen A. G., Burgering Boudewijn M. Th.
Primary Institution: University Medical Centre Utrecht
Hypothesis
Mdm2 acts as an E3 ligase for FOXO4, regulating its mono-ubiquitination.
Conclusion
Mdm2 is identified as a novel E3 ligase for FOXO4, influencing its transcriptional activity through mono-ubiquitination.
Supporting Evidence
- Mdm2 co-expression with FOXO4 leads to mono-ubiquitination of FOXO4.
- Depletion of Mdm2 inhibits FOXO4 mono-ubiquitination induced by oxidative stress.
- Mdm2's E3 ligase activity is essential for the mono-ubiquitination of FOXO4.
- Mono-ubiquitination of FOXO4 enhances its transcriptional activity.
Takeaway
Mdm2 helps attach a small tag to FOXO4, which can change how FOXO4 works in the cell, especially when the cell is under stress.
Methodology
In vitro and in vivo experiments were conducted to analyze the interaction and ubiquitination of FOXO4 by Mdm2.
Limitations
The study does not explore the long-term effects of Mdm2 on FOXO4 stability and function.
Statistical Information
P-Value
p<0.005
Statistical Significance
p<0.005
Digital Object Identifier (DOI)
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