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Updated: Jul 20, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
A high-throughput loss-of-function screening identifies novel p53 regulators
Susana Llanos1, Alejo Efeyan, Jorge Monsech
1Tumor Suppression Group, Spanish National Cancer Center (CNIO), Madrid, Spain.
Researchers identified four novel genes that inhibit tumor suppressor p53 (protein 53) activity. Modulating these genes impacts p53
Area of Science:
- Molecular Biology
- Cancer Research
- Genetics
Background:
- The p53 protein is a critical tumor suppressor, regulating apoptosis and cell cycle arrest.
- Understanding p53 regulation is key to developing cancer therapies.
Purpose of the Study:
- To identify novel proteins that regulate p53 transcriptional activity.
- To investigate the role of these newly identified proteins in p53-mediated cellular processes.
Main Methods:
- A large-scale RNA interference (RNAi) screen was employed to identify regulatory proteins.
- Gene interference and overexpression studies were conducted to validate findings.
Main Results:
- Four previously unrecognized genes (GAS41, RPS6K4, RUNDC1, and CRMP-2) were identified as p53 modulators.
- Interference with these genes upregulated p53 transcriptional activity.
- Overexpression of these genes inhibited p53 target promoters and p53-mediated apoptosis.
Conclusions:
- GAS41, RPS6K4, RUNDC1, and CRMP-2 function as inhibitors of p53.
- These identified genes may possess oncogenic activity, highlighting potential therapeutic targets.
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