Cited by 59Ubiquitin and proteasome pathwaysViral-associated cancers and disordersCancer-related Molecular Pathways

The herpesvirus associated ubiquitin specific protease, USP7, is a negative regulator of PML proteins and PML nuclear bodies.

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Sarkari, Feroz, Wang, Xueqi, Nguyen, Tin, Frappier, Lori·2011·PLoS ONE

Abstract

The PML tumor suppressor is the founding component of the multiprotein nuclear structures known as PML nuclear bodies (PML-NBs), which control several cellular functions including apoptosis and antiviral effects. The ubiquitin specific protease USP7 (also called HAUSP) is known to associate with PML-NBs and to be a tight binding partner of two herpesvirus proteins that disrupt PML NBs. Here we investigated whether USP7 itself regulates PML-NBs. Silencing of USP7 was found to increase the number of PML-NBs, to increase the levels of PML protein and to inhibit PML polyubiquitylation in nasopharyngeal carcinoma cells. This effect of USP7 was independent of p53 as PML loss was observed in p53-null cells. PML-NBs disruption was induced by USP7 overexpression independently of its catalytic activity and was induced by either of the protein interaction domains of USP7, each of which localized to PML-NBs. USP7 also disrupted NBs formed from some single PML isoforms, most notably isoforms I and IV. CK2α and RNF4, which are known regulators of PML, were dispensable for USP7-associated PML-NB disruption. The results are consistent with a novel model of PML regulation where a deubiquitylase disrupts PML-NBs through recruitment of another cellular protein(s) to PML NBs, independently of its catalytic activity.

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  • USP7 associates with PML bodies.

    “USP7 also associates with PML bodies (Sarkari et al., 2011) and PML proteins are essential for USP7 to degrade POT1 (Episkopou et al., 2019).”

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

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Authors
Sarkari, F., Wang, X., Nguyen, T., & Frappier, L.
Affiliations
University of Toronto (CA)
Corresponding author
Frappier, Lori
Venue
PLoS ONE
Published
2011-01-31
Volume
6
Issue
1
Pages
e16598
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2088620741
Cited by
59
References
60
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 1 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 1 · 2016: 6 · 2015: 10 · 2014: 1 · 2013: 9 · 2012: 7
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Canadian Institutes of Health Research (93652)
  • National Cancer Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Oncology › Viral-associated cancers and disorders
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
USP7, PML nuclear bodies, PML, deubiquitination, ubiquitin-specific protease, PML isoforms, CK2α, RNF4, p53-independent regulation, nasopharyngeal carcinoma, protein-protein interaction domains
MeSH terms
Promyelocytic Leukemia Protein, Ubiquitin-Specific Peptidase 7, Nasopharyngeal Carcinoma, Carcinoma, Gene Expression Regulation, Herpesviridae, Humans, Nasopharyngeal Neoplasms, Nuclear Proteins, Endopeptidases, Protein Binding, Transcription Factors, Tumor Suppressor Protein p53, Protein Isoforms, Tumor Suppressor Proteins, Ubiquitin Thiolesterase, Intranuclear Inclusion Bodies, Cell Line, Tumor, Ubiquitin-Specific Proteases

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