USP7 regulates the stability and function of HLTF through deubiquitination.
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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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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