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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
Summary
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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