USP7 protects genomic stability by regulating Bub3.
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// Serena Giovinazzi 1,2 , Pietro Sirleto 3 , Vasilisa Aksenova 4 , Viacheslav M. Morozov 1,2 , Roberto Zori 5 , William C. Reinhold 6 and Alexander M. Ishov 1,2 1 Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL 2 University of Florida Health Cancer Center, Gainesville, FL 3 Bambino Gesu’ Children’s Hospital, Rome, Italy 4 Molecular Pharmacology laboratory, Institute of Technology and Institute of Cytology, St-Petersburg, Russia 5 Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 6 Genomics and Bioinformatics Group, Laboratory of Molecular Pharmacology, National Cancer Institute, National Institutes of Health, Bethesda, MD Correspondence: Alexander M. Ishov, email: // Keywords : deubiquitinase USP7, Bub3, spindle assembly checkpoint (SAC), genomic instability, USP7 inhibitors Received : April 15, 2014 Accepted : May 17, 2014 Published : May 19, 2014 Abstract USP7 (Ubiquitin Specific processing Protease-7) is a deubiquitinase which, over the past decade emerged as a critical regulator of cellular processes. Deregulation of USP7 activity has been linked to cancer, making USP7 inhibition an appealing anti-cancer strategy. The identification of novel USP7 substrates and additional USP7-dependent cellular activities will broaden our knowledge towards potential clinical application of USP7 inhibitors. Results presented in this study uncover a novel and pivotal function of USP7 in the maintenance of genomic stability. Upon USP7 depletion we observed prolonged mitosis and mitotic abnormalities including micronuclei accumulation, lagging chromosomes and karyotype instability. Inhibition of USP7 with small molecule inhibitors stabilizes cyclin B and causes mitotic abnormalities. Our results suggest that these USP7-dependent effects are mediated by decreased levels of spindle assembly checkpoint (SAC) component Bub3, which we characterized as an interacting partner and substrate of USP7. In silico analysis across the NCI-60 panels of cell lines supports our results where lower levels of USP7 strongly correlate with genomic instability. In conclusion, we identified a novel role of USP7 as regulator of the SAC component Bub3 and genomic stability.
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USP7 influences proper chromatid alignment and segregation by deubiquitinating Bub3 during M phase.
“Aside from PLK1-mediated regulation, USP7 also influences proper chromatid alignment and segregation by deubiquitinating Bub3 during M phase (Giovinazzi et al., 2014).”
From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Giovinazzi et al., 2014
Similar chromosomal abnormalities were detected in both p53 positive and null cell lines following USP7 depletion, suggesting this phenotype might be caused by means other than p53 deregulation.
“Although p53 status was not a reported parameter in these analyses, similar chromosomal abnormalities were detected in both p53 positive and null cell lines following USP7 depletion, suggesting this phenotype might be caused by means other than p53 deregulation (Giovinazzi et al., 2013, 2014).”
From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Giovinazzi et al., 2014
USP7 mRNA expression levels correlate with genomic instability across the NCI-60 panel of cancer cell lines.
“For instance, USP7 mRNA expression levels were found to correlate with genomic instability across the NCI-60 panel of cancer cell lines (Giovinazzi et al., 2014).”
From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Giovinazzi et al., 2014
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USP7: Structure, substrate specificity, and inhibition
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USP7 Is a Master Regulator of Genome Stability
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“For instance, USP7 mRNA expression levels were found to correlate with genomic instability across the NCI-60 panel of cancer cell lines (Giovinazzi et al., 2014).”
BackgroundZhang, C., Lu, J., Zhang, Q.-W., Zhao, W., Guo, J.-H., Liu, S.-L., Wu, Y.-L., Jiang, B., & Gao, F.-H. (2016) · The International Journal of Biochemistry & Cell Biology · doi:10.1016/j.biocel.2016.08.025 · Cited by 67 · see citing works
- Authors
- Giovinazzi, S., Sirleto, P., Aksenova, V., Morozov, V. M., Zori, R., Reinhold, W. C., & Ishov, A. M.
- Affiliations
- University of Florida Health (US)
- Institute of Cytology (RU)
- National Institutes of Health (US)
- ORCID
- Venue
- Oncotarget
- Publisher
- Impact Journals, LLC
- Published
- 2014-05-19
- Volume
- 5
- Issue
- 11
- Pages
- 3728-3742
- ISSN
- 1949-2553 (ISSN-L)
- PMC
- PMC4116516
- OpenAlex
- W1504025592
- Cited by
- 34
- References
- 81
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 1 · 2022: 13 · 2021: 2 · 2020: 2 · 2019: 4 · 2018: 2 · 2016: 5 · 2015: 3
- FWCI
- 1.09
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by
- Locations
- Oncotarget (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- Johns Hopkins University (HCT116)
- National Institutes of Health (/ NCI R01)
- Medical Research Council
- National Cancer Institute (HCT116, R01CA127378)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Keywords
- USP7, Bub3, deubiquitinase, spindle assembly checkpoint, genome stability, mitotic abnormalities, cyclin B, USP7 inhibitors, karyotype instability, micronuclei, lagging chromosomes, NCI-60 cell lines
- MeSH terms
- Poly-ADP-Ribose Binding Proteins, Ubiquitin-Specific Peptidase 7, Humans, Neoplasms, Transfection, Gene Expression, Cell Cycle Proteins, Genomic Instability, Ubiquitin Thiolesterase, HCT116 Cells, HEK293 Cells
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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