Cited by 35Ubiquitin and proteasome pathwaysDNA Repair MechanismsEpigenetics and DNA Methylation

USP7 regulates the stability and function of HLTF through deubiquitination.

Qing, Peng, Han, Lu, Bin, Liu, Yan, Lu, Ping, Wen Xue·2011·Journal of Cellular Biochemistry

Abstract

Human helicase-like transcription factor (HLTF) is a functional homologue of yeast Rad5 that regulates error-free replication through DNA lesions. HLTF promotes the Lys-63-linked polyubiquitination of proliferating cell nuclear antigen (PCNA) that is required for maintaining genomic stability. Here, we identified the deubiquitylating enzyme ubiquitin-specific protease 7 (USP7) as a novel regulator of HLTF stability. We found that USP7 interacted with and stabilized HLTF after genotoxic stress. Furthermore, USP7 mediated deubiquitination significantly prolonged the half-life of HLTF, which in turn increased PCNA polyubiquitination. More intriguingly, silencing of USP7 rendered A549 cells highly sensitive to DNA damage and over-expression of HLTF attenuated this sensitivity. Thus, our results delineate a previously unknown USP7-HLTF-PCNA molecular network controlling DNA damage response.

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Crossref · 10.1002/jcb.23317

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  • USP7 indirectly influences PCNA monoubiquitination by regulating the stability of Rad18 and HLTF E3 ubiquitin ligases.

    “In addition, USP7 has been suggested to indirectly influence PCNA mono-ubiqutination, by regulating the stability of the Rad18 and HLTF E3 ubiquitin ligases (Qing et al., 2011; Zlatanou et al., 2016).”

    From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Qing et al., 2011

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Authors
Qing, P., Han, L., Bin, L., Yan, L., & Ping, W. X.
Affiliations
  • Minhang District Central Hospital (CN)
  • Shanghai Jiao Tong University (CN)
Corresponding author
Ping, Wen Xue
ORCID
Han, Lu
Venue
Journal of Cellular Biochemistry
Publisher
Wiley
Published
2011-10-22
Volume
112
Issue
12
Pages
3856-3862
ISSN
0730-2312 (ISSN-L)
OpenAlex
W2006027217
Cited by
35
References
22
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2021: 2 · 2020: 3 · 2019: 4 · 2018: 1 · 2017: 1 · 2016: 4 · 2015: 7 · 2014: 2 · 2013: 3 · 2012: 1
FWCI
0.78
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cellular Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
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 › Epigenetics and DNA Methylation
Keywords
USP7, HLTF, deubiquitination, protein stability, PCNA, DNA damage response, genotoxic stress, genome stability, A549 cells
MeSH terms
Ubiquitin-Specific Peptidase 7, Base Sequence, Cell Line, DNA Damage, DNA-Binding Proteins, Humans, Transcription Factors, Proliferating Cell Nuclear Antigen, Reverse Transcriptase Polymerase Chain Reaction, Gene Silencing, RNA Interference, Ubiquitin Thiolesterase, Ubiquitination, Gene Knockdown Techniques

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