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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
Mutant p53 gain of function: the NF-Y connection
Melissa J Peart1, Carol Prives
1Department of Biological Sciences, Columbia University, New York, New York 10027, USA.
Abstract:
The molecular mechanisms underlying mutant p53 gain of function are becoming increasingly complex. In this issue of Cancer Cell, Di Agostino et al. identify the heterotrimeric transcription factor NF-Y as an interacting partner of mutant p53. They show that mutant p53/NF-Y complexes bind to NF-Y target promoters and recruit p300 in response to DNA damage, resulting in aberrant transactivation of NF-Y target genes and cell cycle deregulation. These data thereby implicate transcriptional activation by mutant p53 as a key mechanism responsible for its oncogenic activity.
Insights
Mutant p53 gains oncogenic function by interacting with the NF-Y transcription factor. This complex aberrant transactivates NF-Y target genes, leading to cell cycle deregulation and promoting cancer.
Area of Science:
- Molecular biology
- Cancer research
- Genetics
Background:
- Mutant p53 proteins exhibit gain-of-function (GOF) activities beyond loss of tumor suppressor functions.
- The precise molecular mechanisms driving mutant p53 GOF are intricate and still being elucidated.
- Transcription factor NF-Y plays crucial roles in regulating gene expression, particularly cell cycle genes.
Discussion:
- Di Agostino et al. reveal NF-Y as a novel interacting partner of mutant p53.
- Mutant p53 forms complexes with NF-Y, influencing its DNA binding and transcriptional activity.
- This interaction is critical for aberrant gene expression and cell cycle control in response to DNA damage.
Key Insights:
- Mutant p53 directly interacts with the heterotrimeric transcription factor NF-Y.
- The mutant p53/NF-Y complex binds to NF-Y target gene promoters.
- Recruitment of p300 by the mutant p53/NF-Y complex leads to aberrant transactivation of NF-Y target genes, including those involved in cell cycle regulation.
Outlook:
- This study implicates transcriptional dysregulation by mutant p53 as a central mechanism for its oncogenic activity.
- Targeting the mutant p53/NF-Y interaction could offer novel therapeutic strategies for cancers harboring mutant p53.
- Further research is warranted to explore the full spectrum of genes regulated by this complex and its role in various cancer types.
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