Cited by 113DNA Repair MechanismsEpigenetics and DNA MethylationGenomics and Chromatin Dynamics

Bat3 facilitates H3K79 dimethylation by DOT1L and promotes DNA damage‐induced 53BP1 foci at G1/G2 cell‐cycle phases

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Wakeman, Timothy P, Wang, Qinhong, Feng, Junjie, Wang, Xiao‐Fan·2012·The EMBO Journal

Abstract

The methyltransferase DOT1L methylates histone H3 at K79 to facilitate specific biological events. H3K79 dimethylation (H3K79-2Me) by DOT1L influences the DNA damage response by promoting 53BP1 recruitment to DNA damage sites; however, it is unclear if this methylation is required as 53BP1 interacts with dimethylated H4 (H4K20-2Me) with a much higher affinity. We demonstrate that H3K79-2Me, while negligible during S-phase, is required for ionizing radiation (IR)-induced 53BP1 foci formation during G1/G2-phases when H4K20-2Me levels are low. Further, we describe an essential role for HLA-B-associated transcript 3 (Bat3) in regulating this process in U2OS cells. Bat3 co-localizes with DOT1L at histone H3, and Bat3 knockdown results in decreased DOT1L-H3 interaction and H3K79-2Me, leading to a reduction in IR-induced 53BP1 foci formation, defects in DNA repair and increased sensitivity to IR. We demonstrate that a conserved Bat3 ubiquitin-like motif and a conserved DOT1L ubiquitin-interacting motif promote DOT1L-Bat3 interaction to facilitate efficient H3K79-2Me and IR-induced 53BP1 foci formation during G1/G2-phases. Taken together, our findings identify a novel role for Bat3 in regulating DOT1L function, which plays a critical role in DNA damage response.

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Crossref · 10.1038/emboj.2012.50

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Authors
Wakeman, T. P., Wang, Q., Feng, J., & Wang, X.
Affiliations
Duke University (US)
Corresponding author
  • Wakeman, Timothy P
  • Wang, Qinhong
  • Wang, Xiao‐Fan
Venue
The EMBO Journal
Published
2012-02-28
Volume
31
Issue
9
Pages
2169-2181
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2116860088
Cited by
113
References
47
Citations by year
2026: 2 · 2025: 6 · 2024: 8 · 2023: 5 · 2022: 8 · 2021: 7 · 2020: 5 · 2019: 15 · 2018: 3 · 2017: 11 · 2016: 9 · 2015: 11 · 2014: 8 · 2013: 10 · 2012: 5
FWCI
4.37
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA123250)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
BAT3, DOT1L, histone methyltransferase, 53BP1 foci, DNA damage response, ionizing radiation, DNA repair, radiosensitivity, ubiquitin-interacting motif, U2OS cells
MeSH terms
Tumor Suppressor p53-Binding Protein 1, DNA Damage, DNA Repair, HeLa Cells, Histones, Humans, Methylation, Methyltransferases, Histone-Lysine N-Methyltransferase, G1 Phase, G2 Phase, Molecular Chaperones, Cell Line, Tumor, Intracellular Signaling Peptides and Proteins, HEK293 Cells

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