PreprintCited by 237DNA Repair MechanismsUbiquitin and proteasome pathwaysGenomics and Chromatin Dynamics

SUMO-targeted ubiquitin E3 ligase RNF4 is required for the response of human cells to DNA damage

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Yin, Yili, Seifert, Anne, Chua, Joy Shijia, Maure, Jean-François, Golebiowski, Filip, Hay, Ronald T.·2012·Genes & Development

Abstract

Here we demonstrate that RNF4, a highly conserved small ubiquitin-like modifier (SUMO)-targeted ubiquitin E3 ligase, plays a critical role in the response of mammalian cells to DNA damage. Human cells in which RNF4 expression was ablated by siRNA or chicken DT40 cells with a homozygous deletion of the RNF4 gene displayed increased sensitivity to DNA-damaging agents. Recruitment of RNF4 to double-strand breaks required its RING and SUMO interaction motif (SIM) domains and DNA damage factors such as NBS1, mediator of DNA damage checkpoint 1 (MDC1), RNF8, 53BP1, and BRCA1. In the absence of RNF4, these factors were still recruited to sites of DNA damage, but 53BP1, RNF8, and RNF168 displayed delayed clearance from such foci. SILAC-based proteomics of SUMO substrates revealed that MDC1 was SUMO-modified in response to ionizing radiation. As a consequence of SUMO modification, MDC1 recruited RNF4, which mediated ubiquitylation at the DNA damage site. Failure to recruit RNF4 resulted in defective loading of replication protein A (RPA) and Rad51 onto ssDNA. This appeared to be a consequence of reduced recruitment of the CtIP nuclease, resulting in inefficient end resection. Thus, RNF4 is a novel DNA damage-responsive protein that plays a role in homologous recombination and integrates SUMO modification and ubiquitin signaling in the cellular response to genotoxic stress.

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Authors
Yin, Y., Seifert, A., Chua, J. S., Maure, J.-F., Golebiowski, F., & Hay, R. T.
Affiliations
Wellcome Trust (GB)
Venue
Genes & Development
Published
2012-06-01
Volume
26
Issue
11
Pages
1196-1208
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2140740835
Cited by
237
References
47
Citations by year
2026: 9 · 2025: 8 · 2024: 11 · 2023: 6 · 2022: 16 · 2021: 14 · 2020: 13 · 2019: 15 · 2018: 9 · 2017: 21 · 2016: 24 · 2015: 26 · 2014: 22 · 2013: 33 · 2012: 10
Type
posted content
Language
en
Open access
Licence
other-oa
Locations
  • Genes & Development (publishedVersion, other-oa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (submittedVersion)
Funders
  • Wellcome Trust (098391/Z/12/Z)
  • Cancer Research UK (13067)
  • Research Councils UK
  • Medical Research Council
  • European Regional Development Fund
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
RNF4, DNA damage response, SUMOylation, MDC1, ubiquitination, homologous recombination, end resection, CtIP, RAD51, NBS1, 53BP1, RNF8, RNF168, ionizing radiation, DNA double-strand breaks
MeSH terms
Animals, DNA Damage, DNA Repair, HeLa Cells, Humans, Nuclear Proteins, Transcription Factors, Trans-Activators, Cell Cycle Proteins, Ubiquitin, Ubiquitin-Protein Ligases, Cell Line, Tumor, Adaptor Proteins, Signal Transducing, Rats, DNA Breaks, Double-Stranded, Homologous Recombination

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