How DNA Damage Affects Oocyte Quality Control
Author Information
Author(s): Gregor B. Deutsch, Elisabeth M. Zielonka, Daniel Coutandin, Tobias A. Weber, Birgit Schäfer, Jens Hannewald, Laura M. Luh, Florian G. Durst, Mohamed Ibrahim, Jan Hoffmann, Frank H. Niesen, Aycan Sentürk, Hana Kunkel, Bernd Brutschy, Enrico Schleiff, Stefan Knapp, Amparo Acker-Palmer, Manuel Grez, Frank McKeon, Volker Dötsch
Primary Institution: Goethe University, Frankfurt, Germany
Hypothesis
TAp63α is kept in an inactive dimeric state and its activation requires tetramerization triggered by phosphorylation.
Conclusion
The study demonstrates that TAp63α is inhibited in a dimeric state and that DNA damage triggers its activation through tetramer formation, significantly increasing its DNA binding affinity.
Supporting Evidence
- TAp63α is kept in a closed dimeric conformation in nonstressed oocytes.
- Phosphorylation promotes the formation of active tetramers.
- Tetramerization increases the DNA binding affinity of TAp63α by approximately 20-fold.
Takeaway
When DNA in egg cells gets damaged, a protein called TAp63α changes from a sleepy form to an active form that can help fix the damage, but this change is a one-way street.
Methodology
The study used size exclusion chromatography and multiangle light scattering to analyze the oligomeric state of TAp63α in vitro and in vivo.
Digital Object Identifier (DOI)
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