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Updated: Sep 29, 2025
14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
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Structural diversity of p63 and p73 isoforms
Christian Osterburg1, Volker Dötsch2
1Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Frankfurt am Main, Germany.
Cell Death and Differentiation
|March 22, 2022
Summary
The p53 protein family, including p53, p63, and p73, exhibits domain similarities but diverse functions in tumor suppression and development. Isoform-specific roles and evolutionary changes in their domains are key to understanding their distinct activities.
Area of Science:
- Molecular Biology
- Evolutionary Biology
- Protein Biochemistry
Background:
- The p53 protein family is extensively studied due to its critical roles in cellular processes.
- Sequence and structural analyses reveal significant domain homology among p53, p63, and p73.
- Despite structural similarities, functional studies highlight diverse roles in tumor suppression, quality control, and development.
Purpose of the Study:
- To review the structure and domain organization of p63 and p73.
- To analyze domain interactions within full-length p63 and p73 proteins.
- To discuss the evolutionary origins of the p53 protein family.
Main Methods:
- Sequence analysis
- Structure determination
- Functional studies review
- Comparative evolutionary analysis
Main Results:
- Distinct isoforms of p53, p63, and p73 perform specific physiological roles.
- p63's transactivation domain is constitutively active, unlike the regulated domains of p53/p73.
- Evolutionary loss of an oligomerization domain helix in p63/p73 correlates with DNA binding domain destabilization and transactivation domain splitting.
Conclusions:
- Isoform diversity and domain evolution are critical for the distinct functions of the p53 protein family.
- Understanding these variations is essential for comprehending tumor suppression, development, and quality control mechanisms.
- Further research is needed to elucidate the functions of specific domains and isoforms, particularly in invertebrates and short isoforms.
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