Cited by 178DNA Repair MechanismsBRCA gene mutations in cancerPARP inhibition in cancer therapy

Promotion of BRCA2-Dependent Homologous Recombination by DSS1 via RPA Targeting and DNA Mimicry

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Zhao, Weixing, Vaithiyalingam, Sivaraja, San Filippo, Joseph, Maranon, David G., Jimenez-Sainz, Judit, Fontenay, Gerald V., Kwon, Youngho, Leung, Stanley G. +5 more·2015·Molecular Cell

Abstract

The tumor suppressor BRCA2 is thought to facilitate the handoff of ssDNA from replication protein A (RPA) to the RAD51 recombinase during DNA break and replication fork repair by homologous recombination. However, we find that RPA-RAD51 exchange requires the BRCA2 partner DSS1. Biochemical, structural, and in vivo analyses reveal that DSS1 allows the BRCA2-DSS1 complex to physically and functionally interact with RPA. Mechanistically, DSS1 acts as a DNA mimic to attenuate the affinity of RPA for ssDNA. A mutation in the solvent-exposed acidic domain of DSS1 compromises the efficacy of RPA-RAD51 exchange. Thus, by targeting RPA and mimicking DNA, DSS1 functions with BRCA2 in a two-component homologous recombination mediator complex in genome maintenance and tumor suppression. Our findings may provide a paradigm for understanding the roles of DSS1 in other biological processes.

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Crossref · 10.1016/j.molcel.2015.05.032

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  • Unlike BRCA2-DSS1, BRCA1-BARD1 fails to promote assembly of RAD51 presynaptic filaments on RPA-coated ssDNA.

    “while, as reported previously36,38, the BRCA2-DSS1 complex promotes RAD51 presynaptic filament assembly on RPA-coated ssDNA, BRCA1-BARD1 does not possess such an attribute”

    From BRCA1–BARD1 promotes RAD51-mediated homologous DNA pairing (2017) · cites this paper as [36]

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Authors
Zhao, W., Vaithiyalingam, S., San Filippo, J., Maranon, D. G., Jimenez-Sainz, J., Fontenay, G. V., Kwon, Y., Leung, S. G., Lu, L., Jensen, R. B., Chazin, W. J., Wiese, C., & Sung, P.
Affiliations
  • Yale University (US)
  • Vanderbilt University (US)
  • Colorado State University (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
  • Chazin, Walter J.
  • Sung, Patrick
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2015-07
Volume
59
Issue
2
Pages
176-187
ISSN
1097-2765 (ISSN-L)
OpenAlex
W1521943738
Cited by
177
References
64
Citations by year
2026: 11 · 2025: 6 · 2024: 14 · 2023: 19 · 2022: 20 · 2021: 29 · 2020: 20 · 2019: 14 · 2018: 14 · 2017: 15 · 2016: 14 · 2015: 1
FWCI
6.37
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (GM65484, P30 CA068485, P30 ES00267, CA92584, CA168635, ES015252, ES007061, ES021454, S10 RR025677)
  • Vanderbilt University
  • National Science Foundation (0922862)
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, DSS1, RPA, RAD51, homologous recombination, single-stranded DNA binding, DNA repair, replication fork repair, genome maintenance, tumor suppression, acidic domain, protein complexes
MeSH terms
Breast Neoplasms, Cell Line, Female, HeLa Cells, Humans, Models, Biological, Recombinant Proteins, Mutagenesis, Site-Directed, Molecular Mimicry, Nuclear Magnetic Resonance, Biomolecular, Amino Acid Substitution, Protein Subunits, BRCA2 Protein, Proteasome Endopeptidase Complex, Rad51 Recombinase, Replication Protein A, Homologous Recombination

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