Cited by 71DNA Repair MechanismsGenomics and Chromatin DynamicsEffects of Radiation Exposure

The histone variant macroH2A1.1 is recruited to DSBs through a mechanism involving PARP1

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Xu, Chang, Xu, Ye, Gursoy-Yuzugullu, Ozge, Price, Brendan D.·2012·FEBS Letters

Abstract

The repair of DNA double‐strand breaks (DSBs) requires remodeling of the local chromatin architecture to allow the repair machinery to access sites of damage. Here, we report that the histone variant macroH2A1.1 is recruited to DSBs. Cells lacking macroH2A1 have defective recruitment of 53BP1, defective activation of chk2 kinase and increased radiosensitivity. Importantly, macroH2A1.1 is not incorporated into nucleosomes at DSBs, but instead associates with the chromatin through a mechanism which requires PARP1 activity. These results reveal an unusual mechanism involving a direct association of macroH2A1.1 with PARylated chromatin which is critical for retaining 53BP1 at sites of damage.

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Authors
Xu, C., Xu, Y., Gursoy-Yuzugullu, O., & Price, B. D.
Affiliations
Harvard University (US)
Corresponding author
  • Xu, Chang
  • Price, Brendan D.
Venue
FEBS Letters
Publisher
Wiley
Published
2012-09-29
Volume
586
Issue
21
Pages
3920-3925
ISSN
  • 0014-5793 (ISSN-L)
  • 1873-3468
OpenAlex
W2130300210
Cited by
71
References
26
Citations by year
2026: 2 · 2024: 5 · 2023: 2 · 2022: 5 · 2021: 7 · 2020: 6 · 2019: 8 · 2018: 4 · 2017: 8 · 2016: 6 · 2015: 6 · 2014: 7 · 2013: 4 · 2012: 1
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • FEBS Letters (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA064585, R01CA093602, CA64585, CA93602)
Topics
  • 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
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
Keywords
macroH2A1.1, histone variants, DNA double-strand breaks, PARP1, poly(ADP-ribosyl)ation, 53BP1, radiosensitivity, chromatin remodeling, DNA repair
MeSH terms
Poly (ADP-Ribose) Polymerase-1, Tumor Suppressor p53-Binding Protein 1, Chromatin, DNA Repair, Histones, Humans, Nucleosomes, Plasmids, Poly(ADP-ribose) Polymerases, Radiation Tolerance, Radiation, Ionizing, Transfection, Signal Transduction, Protein Serine-Threonine Kinases, Protein Transport, Chromatin Assembly and Disassembly, Cell Line, Tumor, Intracellular Signaling Peptides and Proteins, DNA Breaks, Double-Stranded, Checkpoint Kinase 2

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