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Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
The common and distinct target genes of the p53 family transcription factors
1Department of Cell Biology, University of Alabama at Birmingham, 1918 University Blvd., Birmingham, Alabama 35294, USA.
Abstract:
p53 is the most commonly mutated gene in human cancer. After activation by cellular stresses such as DNA damage or oncogene activation, p53, a sequence-specific DNA-binding protein, induces the expression of target genes which mediate tumor suppression. Two recently identified p53 homologues, p63 and p73, appear to function similarly to p53, that is, they both activate target gene expression and suppress cell growth when overexpressed; however, the p63 and p73 genes are rarely mutated in human cancer and do not adhere to Knudson's classical model of a tumor suppressor gene. Recently, exciting observations suggest nonoverlapping functions for the family members. Herein, we outline the recent literatures identifying and characterizing both the common and distinct target genes of the p53 family transcription factors in relation to their signaling pathways.
Insights
The p53 gene family, including p53, p63, and p73, plays crucial roles in tumor suppression. This review details their common and distinct target genes and signaling pathways.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- The p53 gene is the most frequently mutated gene in human cancers.
- p53 acts as a sequence-specific DNA-binding protein, inducing target genes for tumor suppression upon cellular stress.
- p53 homologues, p63 and p73, share functional similarities but are rarely mutated in cancer.
Purpose of the Study:
- To review and characterize the common and distinct target genes of the p53 family (p53, p63, p73).
- To explore the signaling pathways associated with these transcription factors.
- To highlight emerging nonoverlapping functions within the p53 family.
Main Methods:
- Literature review of recent studies on p53 family transcription factors.
- Analysis of identified common and distinct target genes.
- Examination of associated signaling pathways.
Main Results:
- p53, p63, and p73 share some target genes and functions in gene expression activation and cell growth suppression.
- Distinct target genes and signaling pathways differentiate the roles of p53, p63, and p73.
- Evidence suggests nonoverlapping functions among p53 family members.
Conclusions:
- The p53 family of transcription factors (p53, p63, p73) exhibits both conserved and unique functions.
- Understanding the distinct target genes and pathways is crucial for comprehending their roles in cancer.
- Further research into the nonoverlapping functions may reveal new therapeutic strategies.
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