Cited by 89Ubiquitin and proteasome pathwaysDNA Repair MechanismsGenomics and Chromatin Dynamics

USP7 deubiquitinase promotes ubiquitin-dependent DNA damage signaling by stabilizing RNF168.

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Zhu, Qianzheng, Sharma, Nidhi, He, Jinshan, Wani, Gulzar, Wani, Altaf A·2015·Cell Cycle

Abstract

During DNA damage response (DDR), histone ubiquitination by RNF168 is a critical event, which orchestrates the recruitment of downstream DDR factors, e.g. BRCA1 and 53BP1. Here, we report USP7 deubiquitinase regulates the stability of RNF168. We showed that USP7 disruption impairs H2A and ultraviolet radiation (UVR)-induced γH2AX monoubiquitination, and decreases the levels of pBmi1, Bmi1, RNF168 and BRCA1. The effect of USP7 disruption was recapitulated by siRNA-mediated USP7 depletion. The USP7 disruption also compromises the formation of UVR-induced foci (UVRIF) and ionizing radiation-induced foci (IRIF) of monoubiquitinated H2A (uH2A) and polyubiquitinated H2AX/A, and subsequently affects UVRIF and IRIF of BRCA1 as well as the IRIF of 53BP1. USP7 was shown to physically bind RNF168 in vitro and in vivo. Overexpression of wild-type USP7, but not its interaction-defective mutant, prevents UVR-induced RNF168 degradation. The USP7 mutant is unable to cleave Ub-conjugates of RNF168 in vivo. Importantly, ectopic expression of RNF168, or both RNF8 and RNF168 together in USP7-disrupted cells, significantly rescue the formation of UVRIF and IRIF of polyubiquitinated H2A and BRCA1. Taken together, these findings reveal an important role of USP7 in regulating ubiquitin-dependent signaling via stabilization of RNF168.

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Crossref · 10.1080/15384101.2015.1007785

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  • USP7 directly deubiquitinates and stabilizes RNF168 and its paralog RNF169.

    “In addition to stabilizing MDC1 – and thus promoting RNF168 accumulation – USP7 also directly deubiquitinates and stabilizes RNF168 (Zhu et al., 2015), as well as its paralog, RNF169 (An et al., 2017).”

    From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Zhu et al., 2015

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Authors
Zhu, Q., Sharma, N., He, J., Wani, G., & Wani, A. A.
Affiliations
  • The Ohio State University (US)
  • The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (US)
Corresponding author
  • Zhu, Qianzheng
  • Wani, Altaf A
Venue
Cell Cycle
Published
2015-04-30
Volume
14
Issue
9
Pages
1413-1425
ISSN
  • 1538-4101 (ISSN-L)
  • 1551-4005
OpenAlex
W1482236046
Cited by
87
References
54
Citations by year
2026: 6 · 2025: 4 · 2024: 9 · 2023: 8 · 2022: 9 · 2021: 3 · 2020: 10 · 2019: 11 · 2018: 6 · 2017: 9 · 2016: 10 · 2015: 2
FWCI
3.91
Type
journal article
Language
en
Open access
Locations
  • Cell Cycle (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • Figshare (cc-by)
Funders
  • Fudan University
  • University of Texas MD Anderson Cancer Center
  • National Institute of Environmental Health Sciences (R01ES002388, ES2388, R01ES012991, ES12991)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
USP7, RNF168, deubiquitinase, protein stability, DNA damage response, histone ubiquitination, BRCA1, 53BP1, BMI1, RNF8, ionizing radiation-induced foci, histone H2A
MeSH terms
Tumor Suppressor p53-Binding Protein 1, Ubiquitin-Specific Peptidase 7, Cell Nucleus, DNA Damage, DNA-Binding Proteins, Enzyme Stability, Gene Expression Regulation, HeLa Cells, Histones, Humans, Protein Binding, Time Factors, Transfection, Ultraviolet Rays, BRCA1 Protein, Ubiquitin, RNA Interference, Ubiquitin Thiolesterase, Ubiquitin-Protein Ligases, HCT116 Cells, Intracellular Signaling Peptides and Proteins, Ubiquitination, Proteolysis

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