Related Experiment Video

Updated: May 3, 2026

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

Published on: August 4, 2019

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Activating p53Y220C with a mutant-specific small molecule

Xijun Zhu1, Woong Sub Byun2,3, Dominika Ewa Pieńkowska4

  • 1Department of Chemistry, Stanford University, Stanford, CA, USA.

Nature Communications
|May 1, 2026
PubMed

Insights

Scientists developed TRAP-1, a novel compound that reactivates the mutated p53 tumor suppressor protein. This chemical inducer of proximity restores p53 function, offering a new therapeutic strategy for cancer treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Drug Discovery

Background:

  • TP53 is frequently mutated in cancer and difficult to therapeutically target.
  • Restoring tumor suppressor function is a key challenge in cancer therapy.

Purpose of the Study:

  • To discover and characterize a novel small molecule that activates mutant p53.
  • To investigate the potential of chemically induced proximity for cancer therapy.

Main Methods:

  • Discovery of TRanscriptional Activator of p53 (TRAP-1), a small molecule inducer of proximity.
  • Characterization of TRAP-1's mechanism involving ternary complex formation with p53Y220C and BRD4.
  • Assessment of TRAP-1's effect on p53 target gene expression, cellular senescence, and apoptosis in cancer cell lines.

Main Results:

  • TRAP-1 potently activates mutant p53Y220C by forming a ternary complex with BRD4.
  • TRAP-1 treatment leads to upregulation of p53 target genes like CDKN1A.
  • TRAP-1 induces cellular senescence and apoptosis in p53Y220C-expressing cancer cells.

Conclusions:

  • Chemically induced proximity is a viable strategy to restore tumor suppressor function.
  • TRAP-1 demonstrates the potential of this approach for reactivating mutant p53 in cancer therapy.
  • This discovery opens new avenues for developing targeted cancer treatments.

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