Cited by 120Cancer-related Molecular PathwaysDNA Repair MechanismsGenomics and Chromatin Dynamics

Wild-Type Human p53 Transactivates the Human Proliferating Cell Nuclear Antigen Promoter

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Shivakumar, Chittari V., Brown, Doris R., Deb, Sumitra, Deb, Swati Palit·1995·Molecular and Cellular Biology

Abstract

The wild-type p53 protein is a transcriptional activator implicated in the control of cellular growth-related gene expression. Here, using a number of different cell lines and transient-transfection-transcription assays, we demonstrate that at low levels, wild-type p53 transactivates the human proliferating cell nuclear antigen (PCNA) promoter. When expressed at a similar level, the tumor-derived p53 mutants did not transactivate the PCNA promoter. We identified a p53-binding site on the human PCNA promoter with which p53 interacts sequence specifically. When placed on a heterologous synthetic promoter, the binding site functions as a wild-type p53 response element in either orientation. Deletion of the p53-binding site renders the PCNA promoter p53 nonresponsive, showing that wild-type p53 transactivates the PCNA promoter by binding to the site. At a higher concentration, wild-type p53 inhibits the PCNA promoter but p53 mutants activate. Transactivation by p53 mutants does not require the p53-binding site. These observations suggest that moderate elevation of the cellular wild-type p53 level induces PCNA production to help in DNA repair.

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  • Regulation of PCNA is cell cycle-dependent and is activated by p53.

    “Therefore, the regulation of PCNA is cell cycle-dependent,168 and is activated by p53.169”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [169]

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Authors
Shivakumar, C. V., Brown, D. R., Deb, S., & Deb, S. P.
Affiliations
The University of Texas at San Antonio Health Science Center (US)
Corresponding author
Deb, Swati Palit
Venue
Molecular and Cellular Biology
Published
1995-12-01
Volume
15
Issue
12
Pages
6785-6793
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2160663669
Cited by
120
References
86
Citations by year
2025: 2 · 2023: 2 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 3 · 2013: 3
FWCI
4.04
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • March of Dimes Foundation
  • American Heart Association
  • Elsa U. Pardee Foundation
  • National Institutes of Health (5u01ai031498-04)
  • National Institute of Allergy and Infectious Diseases (AI31498-02)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
p53, proliferating cell nuclear antigen, transcriptional activation, p53 binding sites, mutant p53, DNA repair, tumor suppressor, transcriptional repression, cell cycle regulation
MeSH terms
Animals, Base Sequence, Cell Line, Chlorocebus aethiops, Deoxyribonuclease I, HeLa Cells, Humans, Molecular Sequence Data, Oligodeoxyribonucleotides, Promoter Regions, Genetic, Recombinant Proteins, Substrate Specificity, Transcription, Genetic, Transfection, Vero Cells, Transcriptional Activation, Tumor Suppressor Protein p53, Mutagenesis, Site-Directed, 3T3 Cells, Proliferating Cell Nuclear Antigen, Mice

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