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Updated: Aug 19, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
14:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

The potential tumor suppressor p73 differentially regulates cellular p53 target genes

J Zhu1, J Jiang, W Zhou

  • 1Institute of Molecular Medicine and Genetics, Medical College of Georgia, Augusta 30912, USA.

Cancer Research
|November 21, 1998
PubMed

Insights

The p73 protein, a p53 homologue, can suppress tumors by inducing apoptosis and cell cycle arrest. While similar to p53, p73 exhibits distinct transcriptional activities, highlighting its unique role in tumor suppression pathways.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • p73 is a homologue of the p53 tumor suppressor.
  • p53-dependent cell cycle arrest is mediated by p21.
  • p73 can induce apoptosis and p21 expression.

Purpose of the Study:

  • To investigate the role of p73 in tumor suppression.
  • To characterize p73-induced cell cycle arrest and apoptosis.
  • To compare the transcriptional activities of p73 and p53.

Main Methods:

  • Established tetracycline-inducible p73-expressing cell lines.
  • Utilized these cell lines to study p73 function.
  • Analyzed p73's activation of p53 target genes.

Main Results:

  • p73 induces both cell cycle arrest and apoptosis.
  • p73 activates a subset of p53 target genes.
  • Transcriptional activities of p53, p73 alpha, and p73 beta differ for common target genes.

Conclusions:

  • p73 functions as a tumor suppressor.
  • p73 shares similarities with p53 but also has distinct functions.
  • p73's unique signaling pathways contribute to tumor suppression.

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