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Related Experiment Videos

From p63 to p53 across p73.

S Strano1, M Rossi, G Fontemaggi

  • 1Molecular Oncologenesis Laboratory, Regina Elena Cancer Institute, Rome, Italy.

FEBS Letters
|February 27, 2001
PubMed
Summary

The tumor suppressor p53 has homologs, p63 and p73, challenging previous gene family evolution models. These p53 family members, p63 and p73, exhibit complex relationships and alternative splicing, impacting cell control.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Evolutionary Biology

Background:

  • Gene families typically arise from ancestral genes via duplication and divergence.
  • The tumor suppressor p53 was considered an exception to this rule.
  • Recently, p53 homologs, p63 and p73, have been identified.

Purpose of the Study:

  • To review the similarities, differences, and evolutionary relationships among p53, p63, and p73.
  • To explore the implications of alternative splicing in p63 and p73.
  • To understand the complexity of the p53 gene family.

Main Methods:

  • Comparative sequence analysis of p53, p63, and p73.
  • Review of existing literature on p53 family members.
  • Analysis of alternative splicing patterns and their functional consequences.

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Main Results:

  • p63 and p73 are more similar to each other than to p53 at the sequence level.
  • This suggests p53 may be phylogenetically younger than a p63/p73-like ancestral gene.
  • Alternative splicing of p63 and p73 creates a complex protein network.

Conclusions:

  • The p53, p63, and p73 gene family presents a unique model for gene evolution.
  • Alternative splicing significantly contributes to the functional diversity of p63 and p73 proteins.
  • These proteins play crucial roles in cell proliferation, apoptosis, and development.