Cited by 260Cancer-related Molecular PathwaysProtein Structure and DynamicsDNA and Nucleic Acid Chemistry

How p53 binds DNA as a tetramer

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McLure, Kevin G., Lee, Patrick W.K.·1998·The EMBO Journal

Abstract

The p53 tumor suppressor protein is a tetramer that binds sequence-specifically to a DNA consensus sequence consisting of two consecutive half-sites, with each half-site being formed by two head-to-head quarter-sites (--><-- --><--). Each p53 subunit binds to one quarter-site, resulting in all four DNA quarter-sites being occupied by one p53 tetramer. The tetramerization domain forms a symmetric dimer of dimers, and two contrasting models have the two DNA-binding domains of each dimer bound to either consecutive or alternating quarter-sites. We show here that the two monomers within a dimer bind to a half-site (two consecutive quarter-sites), but not to separated (alternating) quarter-sites. Tetramers bind similarly, with the two dimers within each tetramer binding to pairs of half-sites. Although one dimer within the tetramer is sufficient for binding to one half-site in DNA, concurrent interaction of the second dimer with a second half-site in DNA drastically enhances binding affinity (at least 50-fold). This cooperative dimer-dimer interaction occurs independently of tetramerization and is a primary mechanism responsible for the stabilization of p53 DNA binding. Based on these findings, we present a model of p53 binding to the consensus sequence, with the tetramer binding DNA as a pair of clamps.

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Crossref · 10.1093/emboj/17.12.3342

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  • Typically, p53 binds to target genes as a tetramer comprising two dimers, each binding a decameric half-site with the consensus sequence RRRCWWGYYY.

    “Typically, p53 binds to the target genes as a tetramer, which comprises two dimers that each binds a decameric half-site with the consensus sequence RRRCWWGYYY (R = A/G, W = A/T, Y = C/T).7, 8, 9, 10”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [8]

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Authors
McLure, K. G., & Lee, P. W. K.
Affiliations
University of Calgary (CA)
Corresponding author
Lee, Patrick W.K.
Venue
The EMBO Journal
Published
1998-06-15
Volume
17
Issue
12
Pages
3342-3350
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2095732342
Cited by
260
References
24
Citations by year
2026: 4 · 2025: 6 · 2024: 5 · 2023: 6 · 2022: 9 · 2021: 7 · 2020: 7 · 2019: 9 · 2018: 13 · 2017: 5 · 2016: 5 · 2015: 6 · 2014: 7 · 2013: 9 · 2012: 10
FWCI
5.87
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
p53, DNA binding, tetramerization domain, cooperative DNA binding, dimer-dimer interactions, tumor suppressor proteins, binding affinity
MeSH terms
DNA, DNA-Binding Proteins, Humans, Polymers, Genes, Tumor Suppressor, Tumor Suppressor Protein p53

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