Cited by 134DNA Repair MechanismsBRCA gene mutations in cancerPARP inhibition in cancer therapy

Recombination Mediator and Rad51 Targeting Activities of a Human BRCA2 Polypeptide

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Filippo, Joseph San, Chi, Peter, Sehorn, Michael G., Etchin, Julia, Krejci, Lumir, Sung, Patrick·2006·Journal of Biological Chemistry

Abstract

BRCA2 likely exerts its tumor suppressor function by enhancing the efficiency of the homology-directed repair of injured chromosomes. To help define the DNA repair role of BRCA2, we expressed and purified a polypeptide, BRC3/4-DBD, that harbors its BRC3 and BRC4 repeats and DNA binding domain. BRC3/4-DBD interacted with hRad51 and bound DNA with a distinct preference for single-stranded (ss) DNA. Importantly we demonstrated by biochemical means and electron microscopy that BRC3/4-DBD nucleates hRad51 onto ssDNA and acts as a recombination mediator in enabling hRad51 to utilize replication protein A-coated ssDNA as recombination substrate. These functions of BRC3/4-DBD required both the BRC repeats and the BRCA2 DNA binding domain. The results thus clarify the role of BRCA2 in Rad51-dependent DNA recombination and repair, and the experimental strategies described herein should be valuable for systematically deciphering this BRCA2 function.

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  • When dsDNA is present, BRCA1-BARD1 cannot target RAD51 to ssDNA, whereas BRCA2-DSS1 can.

    “unlike BRCA2-DSS137,38, BRCA1-BARD1 is devoid of the ability to target RAD51 to ssDNA when dsDNA is present”

    From BRCA1–BARD1 promotes RAD51-mediated homologous DNA pairing (2017) · cites this paper as [37]

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  1. [15]Yuan SS Lee SY Chen G Song M Tomlinson GE Lee EY Cancer Res 1999 59 3547 3551 10446958

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Authors
Filippo, J. S., Chi, P., Sehorn, M. G., Etchin, J., Krejci, L., & Sung, P.
Affiliations
Yale University (US)
Corresponding author
Sung, Patrick
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2006-04
Volume
281
Issue
17
Pages
11649-11657
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2027230427
Cited by
134
References
32
Citations by year
2026: 3 · 2025: 3 · 2024: 2 · 2023: 5 · 2022: 3 · 2021: 7 · 2020: 3 · 2019: 1 · 2018: 7 · 2017: 4 · 2016: 6 · 2015: 5 · 2014: 3 · 2013: 5 · 2012: 6
FWCI
6.25
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Department of Defense
  • Wellcome Trust (GR076476, 076476)
  • National Institutes of Health
  • University of California, Irvine
  • National Cancer Institute (R01CA110415)
  • National Institute of Environmental Health Sciences (R01ES007061)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
Keywords
BRCA2, RAD51, homology-directed repair, DNA recombination, DNA-binding domain, single-stranded DNA, replication protein A, tumor suppressor function, DNA repair, protein-DNA interactions
MeSH terms
DNA Damage, DNA Repair, DNA, Single-Stranded, Humans, Peptide Fragments, Recombination, Genetic, DNA Primers, BRCA2 Protein, Rad51 Recombinase, Replication Protein A

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