Cited by 106DNA Repair MechanismsEffects of Radiation ExposureDNA and Nucleic Acid Chemistry

Mre11 Assembles Linear DNA Fragments into DNA Damage Signaling Complexes

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Costanzo, Vincenzo, Paull, Tanya, Gottesman, Max, Gautier, Jean·2004·PLoS Biology

Abstract

Mre11/Rad50/Nbs1 complex (MRN) is essential to suppress the generation of double-strand breaks (DSBs) during DNA replication. MRN also plays a role in the response to DSBs created by DNA damage. Hypomorphic mutations in Mre11 (which causes an ataxia-telangiectasia-like disease [ATLD]) and mutations in the ataxia-telangiectasia-mutated (ATM) gene lead to defects in handling damaged DNA and to similar clinical and cellular phenotypes. Using Xenopus egg extracts, we have designed a simple assay to define the biochemistry of Mre11. MRN is required for efficient activation of the DNA damage response induced by DSBs. We isolated a high molecular weight DNA damage signaling complex that includes MRN, damaged DNA molecules, and activated ATM. Complex formation is partially dependent upon Zn(2+) and requires an intact Mre11 C-terminal domain that is deleted in some ATLD patients. The ATLD truncation can still perform the role of Mre11 during replication. Our work demonstrates the role of Mre11 in assembling DNA damage signaling centers that are reminiscent of irradiation-induced foci. It also provides a molecular explanation for the similarities between ataxia-telangiectasia (A-T) and ATLD.

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Authors
Costanzo, V., Paull, T., Gottesman, M., & Gautier, J.
Affiliations
  • Columbia University (US)
  • The University of Texas at Austin (US)
Venue
PLoS Biology
Published
2004-05-11
Volume
2
Issue
5
Pages
e110
ISSN
  • 1544-9173 (ISSN-L)
  • 1545-7885
OpenAlex
W2171446708
Cited by
106
References
55
Citations by year
2022: 1 · 2021: 1 · 2019: 2 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 4 · 2013: 4 · 2012: 6
FWCI
5.70
Type
journal article
Language
en
Open access
Locations
  • PLoS Biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Texas ScholarWorks (Texas Digital Library) (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA95866, CN-25111, N01-CN-25111, CA 92245, R01CA092245, R01CA095866, N01 CN025111)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
MRE11, MRN complex, RAD50, NBS1, DNA damage response, DNA double-strand breaks, ataxia telangiectasia, ATM kinase activation, DNA repair, Xenopus egg extracts
MeSH terms
Ku Autoantigen, MRE11 Homologue Protein, Animals, DNA, DNA Damage, DNA-Binding Proteins, Humans, Molecular Weight, Mutation, Peptides, Phenotype, Protein Binding, Recombinant Proteins, Xenopus, Zinc, Blotting, Western, Signal Transduction, Gene Deletion, Protein Structure, Tertiary, Microscopy, Atomic Force, Dimerization, Biotinylation, In Situ Nick-End Labeling, Amino Acid Motifs, Antigens, Nuclear, Replication Protein A, DNA Fragmentation

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