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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

Temporal dissection of p53 function in vitro and in vivo

Maria A Christophorou1, Dionisio Martin-Zanca, Laura Soucek

  • 1Cancer Research Institute, University of California San Francisco Comprehensive Cancer Center, San Francisco, California 94143-0875, USA.

Nature Genetics
|June 1, 2005
PubMed

Insights

Researchers developed a novel mouse model to study the p53 tumor suppressor. This model allows rapid and reversible control of p53 gene function in vivo, offering new insights into its cellular responses.

Area of Science:

  • Genetics
  • Molecular Biology
  • Cancer Research

Background:

  • The p53 tumor suppressor is crucial for cellular responses to DNA damage and oncogenic stress.
  • Understanding p53's dynamic functions requires precise temporal control over its activity.

Purpose of the Study:

  • To create a novel genetic mouse model for investigating the functions of the p53 tumor suppressor.
  • To enable rapid, reversible, and specific perturbation of endogenous p53 gene function in vivo.

Main Methods:

  • Gene replacement strategy to substitute the endogenous Trp53 gene with a tamoxifen-inducible p53ER(TAM) fusion protein.
  • Utilized the p53ER(TAM) mouse model to study p53-mediated responses in both tissues in vivo and cells in vitro.

Main Results:

  • Demonstrated the ability to rapidly switch between wild-type and p53 knockout states in tissues and cells derived from the engineered mice.
  • Defined the kinetics, dependence, persistence, and reversibility of p53 responses to DNA damage, Ras activation, and stress.

Conclusions:

  • The developed p53ER(TAM) knock-in mouse model represents a new class of genetic tools for studying endogenous gene function.
  • This model allows for specific, rapid, and reversible perturbation of p53, facilitating detailed analysis of its biological roles.

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