Cited by 125Cancer-related Molecular PathwaysUbiquitin and proteasome pathwaysGenomics and Chromatin Dynamics

Crosstalk between sumoylation and acetylation regulates p53-dependent chromatin transcription and DNA binding

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Wu, Shwu‐Yuan, Chiang, Cheng‐Ming·2009·The EMBO Journal

Abstract

Covalent modification by small ubiquitin-related modifiers (SUMO) regulates p53 transcription activity through an undefined mechanism. Using reconstituted sumoylation components, we purified SUMO-1-conjugated p53 (Su-p53) to near homogeneity. Su-p53 exists in solution as a tetramer and interacts with p300 histone acetyltransferase as efficiently as the unmodified protein. Nevertheless, it fails to activate p53-dependent chromatin transcription because of its inability to bind DNA. With sequential modification assays, we found that sumoylation of p53 at K386 blocks subsequent acetylation by p300, whereas p300-acetylated p53 remains permissive for ensuing sumoylation at K386 and alleviates sumoylation-inhibited DNA binding. While preventing the free form of p53 from accessing its cognate sites, sumoylation fails to disengage prebound p53 from DNA. The sumoylation-deficient K386R protein, when expressed in p53-null cells, exhibits higher transcription activity and binds better to the endogenous p21 gene compared with the wild-type protein. These studies unravel a molecular mechanism underlying sumoylation-regulated p53 function and further uncover a new role of acetylation in antagonizing the inhibitory effect of sumoylation on p53 binding to DNA.

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Crossref · 10.1038/emboj.2009.83

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  • Competition between Mdm2 and other proteins for modification of these sites may contribute to p53 function.

    “Competition between Mdm2 and other proteins for modification of these sites may therefore contribute to p53 function [127].”

    From The p53 orchestra: Mdm2 and Mdmx set the tone (2010) · cites this paper as [127]

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Authors
Wu, S., & Chiang, C.
Affiliations
Harold C. Simmons Comprehensive Cancer Center (US)
Corresponding author
Chiang, Cheng‐Ming
Venue
The EMBO Journal
Published
2009-04-02
Volume
28
Issue
9
Pages
1246-1259
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2073590048
Cited by
125
References
68
Citations by year
2026: 6 · 2025: 7 · 2024: 5 · 2023: 1 · 2022: 8 · 2021: 12 · 2020: 6 · 2019: 4 · 2018: 5 · 2017: 8 · 2016: 6 · 2015: 3 · 2014: 7 · 2013: 12 · 2012: 12
FWCI
5.83
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA103867, R01CA103867, R01CA124760, CA124760)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
p53, SUMOylation, acetylation, SUMO1, P300, histone acetyltransferase, p53 DNA binding, chromatin transcription, post-translational modification, p21 gene, p53 tetramer, transcriptional activation
MeSH terms
p300-CBP-Associated Factor, Acetylation, Chromatin, Chromatography, Gel, DNA, Humans, Protein Binding, Transcription, Genetic, Tumor Suppressor Protein p53, Reverse Transcriptase Polymerase Chain Reaction, Electrophoretic Mobility Shift Assay, Small Ubiquitin-Related Modifier Proteins, Cell Line, Tumor, Chromatin Immunoprecipitation, p300-CBP Transcription Factors

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