Cited by 72DNA Repair MechanismsUbiquitin and proteasome pathwaysEpigenetics and DNA Methylation

Ring finger protein RNF169 antagonizes the ubiquitin-dependent signaling cascade at sites of DNA damage.

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Chen, Jie, Feng, Wanjuan, Jiang, Jun, Deng, Yiqun, Huen, Michael S.Y.·2012·Journal of Biological Chemistry

Abstract

Ubiquitin signals emanating from DNA double-strand breaks (DSBs) trigger the ordered assembly of DNA damage mediator and repair proteins. This highly orchestrated process is accomplished, in part, through the concerted action of the RNF8 and RNF168 E3 ligases, which have emerged as core signaling intermediates that promote DSB-associated ubiquitylation events. In this study, we report the identification of RNF169 as a negative regulator of the DNA damage signaling cascade. We found that RNF169 interacted with ubiquitin structures and relocalized to DSBs in an RNF8/RNF168-dependent manner. Moreover, ectopic expression of RNF169 attenuated ubiquitin signaling and compromised 53BP1 accumulation at DNA damage sites, suggesting that RNF169 antagonizes RNF168 functions at DSBs. Our study unveils RNF169 as a component in DNA damage signal transduction and adds to the complexity of regulatory ubiquitylation in genome stability maintenance.

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  • RNF168 promotes 53BP1 and BRCA1 localization to DSBs, while RNF169 competes with 53BP1 and BRCA1 for ubiquitin binding and inhibits this binding.

    “While RNF168 promotes 53BP1 and BCRA1 localization to sites of DSBs, RNF169 is a direct inhibitor of this binding. This is because, once RNF168 synthesizes H2A/H2AX ubiquitin chains, RNF169 competes with 53BP1 and BRCA1 for ubiquitin binding (Chen et al., 2012; Panier et al., 2012; Poulsen et al., 2012).”

    From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Chen et al., 2012

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Authors
Chen, J., Feng, W., Jiang, J., Deng, Y., & Huen, M. S. Y.
Affiliations
  • University of Hong Kong (HK)
  • South China Agricultural University (CN)
Corresponding author
  • Deng, Yiqun
  • Huen, Michael S.Y.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-08
Volume
287
Issue
33
Pages
27715-27722
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1976678739
Cited by
72
References
31
Citations by year
2025: 2 · 2024: 2 · 2023: 5 · 2022: 3 · 2021: 4 · 2020: 6 · 2019: 7 · 2018: 8 · 2017: 7 · 2016: 7 · 2015: 5 · 2014: 3 · 2013: 13
FWCI
2.70
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
Funders
National Key Research and Development Program of China
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 › Epigenetics and DNA Methylation
Keywords
RNF8, RNF168, E3 ubiquitin ligase, DNA double-strand breaks, DNA damage signaling, ubiquitination, 53BP1, genome stability
MeSH terms
Cell Line, DNA-Binding Proteins, Humans, Signal Transduction, Ubiquitin, Genomic Instability, Ubiquitin-Protein Ligases, DNA Breaks, Double-Stranded, Ubiquitination

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