Cited by 282DNA Repair MechanismsGenomics and Chromatin DynamicsEffects of Radiation Exposure

H2AX Prevents DNA Breaks from Progressing to Chromosome Breaks and Translocations

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Franco, Sonia, Gostissa, Monica, Zha, Shan, Lombard, David B., Murphy, Michael M., Zarrin, Ali A., Yan, Catherine, Tepsuporn, Suprawee +8 more·2006·Molecular Cell

Abstract

Histone H2AX promotes DNA double-strand break (DSB) repair and immunoglobulin heavy chain (IgH) class switch recombination (CSR) in B-lymphocytes. CSR requires activation-induced cytidine deaminase (AID) and involves joining of DSB intermediates by end joining. We find that AID-dependent IgH locus chromosome breaks occur at high frequency in primary H2AX-deficient B cells activated for CSR and that a substantial proportion of these breaks participate in chromosomal translocations. Moreover, activated B cells deficient for ATM, 53BP1, or MDC1, which interact with H2AX during the DSB response, show similarly increased IgH locus breaks and translocations. Thus, our findings implicate a general role for these factors in promoting end joining and thereby preventing DSBs from progressing into chromosomal breaks and translocations. As cellular p53 status does not markedly influence the frequency of such events, our results also have implications for how p53 and the DSB response machinery cooperate to suppress generation of lymphomas with oncogenic translocations.

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Crossref · 10.1016/j.molcel.2006.01.005

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Authors
Franco, S., Gostissa, M., Zha, S., Lombard, D. B., Murphy, M. M., Zarrin, A. A., Yan, C., Tepsuporn, S., Morales, J. C., Adams, M. M., Lou, Z., Bassing, C. H., Manis, J. P., Chen, J., Carpenter, P. B., & Alt, F. W.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Brigham and Women's Hospital (US)
  • The University of Texas Health Science Center at Houston (US)
  • Mayo Clinic (US)
  • Children's Hospital of Philadelphia (US)
  • Boston Children's Hospital (US)
Corresponding author
Alt, Frederick W.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2006-01
Volume
21
Issue
2
Pages
201-214
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2146355613
Cited by
282
References
60
Citations by year
2026: 2 · 2025: 4 · 2024: 2 · 2023: 5 · 2022: 7 · 2021: 6 · 2020: 11 · 2019: 3 · 2018: 6 · 2017: 9 · 2016: 13 · 2015: 16 · 2014: 18 · 2013: 21 · 2012: 12
FWCI
14.64
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (2PO1AI031541-15, CA92312, GM65812, PO1CA092625-05, RO1 CA89239)
  • U.S. Department of Defense (DAMD17-02-1-0472, DAMD17-03-1-0610)
  • European Molecular Biology Organization
  • Leukemia and Lymphoma Society
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
histone H2AX, DNA double-strand break repair, activation-induced cytidine deaminase, chromosomal translocation, chromosome breakage, B cells, ATM, 53BP1, MDC1, p53, end-joining, lymphoma, DNA damage response
MeSH terms
AICDA (Activation-Induced Cytidine Deaminase), Animals, B-Lymphocytes, Cytidine Deaminase, DNA Damage, DNA Repair, Histones, Immunoglobulin Heavy Chains, Translocation, Genetic, Tumor Suppressor Protein p53, In Situ Hybridization, Fluorescence, Immunoglobulin Class Switching, Mice, Knockout, Chromosome Breakage, Mice, In Vitro Techniques

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