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Related Experiment Video

Updated: Feb 13, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
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SNPing away at mutant p53 activities.

Guadalupe J Ortiz1, Guillermina Lozano1

  • 1Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.

Genes & Development
|March 2, 2018
PubMed
Summary

The R72 polymorphism in the p53 pathway enhances mutant p53

Area of Science:

  • Cancer Biology
  • Molecular Oncology
  • Genetics

Background:

  • The p53 tumor suppressor pathway is critical for preventing cancer.
  • Alterations in p53 pathway proteins, including single-nucleotide polymorphisms (SNPs), can affect cancer risk.
  • Some SNPs influence the gain-of-function (GOF) activities of mutant p53, but the mechanisms are not fully understood.

Purpose of the Study:

  • To investigate the role of the R72 polymorphism in the gain-of-function (GOF) properties of mutant p53.
  • To elucidate the molecular mechanisms by which the R72 polymorphism affects mutant p53 activity.
  • To determine the clinical relevance of the R72 polymorphism in human cancers.

Main Methods:

  • Investigated the interaction between the R72 polymorphism, mutant p53, and PGC-1α.
Keywords:
PGC-1αcodon 72metastasismutant p53oxidative phosphorylation

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  • Assessed the impact of R72 on the invasive and metastatic properties of mutant p53.
  • Analyzed clinical data to correlate R72 presence with patient outcomes in breast cancer.

    • Main Results:

    • The R72 polymorphism was found to enhance the invasive and metastatic GOF properties of mutant p53.
    • This enhancement is mediated by altered interactions with PGC-1α, a key regulator of mitochondrial function.
    • The presence of R72 was associated with poorer outcomes in patients with human breast cancer.

    Conclusions:

    • The R72 polymorphism plays a significant role in promoting the aggressive behavior of mutant p53.
    • Targeting the R72-PGC-1α interaction could offer new therapeutic strategies for cancers with mutant p53.
    • R72 serves as a potential prognostic biomarker for breast cancer patients.