Cited by 71Ubiquitin and proteasome pathwaysDNA Repair MechanismsGenomics and Chromatin Dynamics

A role for USP7 in DNA replication.

Open access
Jagannathan, Madhav, Nguyen, Tin, Gallo, David, Luthra, Niharika, Brown, Grant W., Saridakis, Vivian, Frappier, Lori·2014·Molecular and Cellular Biology

Abstract

The minichromosome maintenance (MCM) complex, which plays multiple important roles in DNA replication, is loaded onto chromatin following mitosis, remains on chromatin until the completion of DNA synthesis, and then is unloaded by a poorly defined mechanism that involves the MCM binding protein (MCM-BP). Here we show that MCM-BP directly interacts with the ubiquitin-specific protease USP7, that this interaction occurs predominantly on chromatin, and that MCM-BP can tether USP7 to MCM proteins. Detailed biochemical and structure analyses of the USP7-MCM-BP interaction showed that the (155)PSTS(158) MCM-BP sequence mediates critical interactions with the TRAF domain binding pocket of USP7. Analysis of the effects of USP7 knockout on DNA replication revealed that lack of USP7 results in slowed progression through late S phase without globally affecting the fork rate or origin usage. Lack of USP7 also resulted in increased levels of MCM proteins on chromatin, and investigation of the cause of this increase revealed a defect in the dissociation of MCM proteins from chromatin in mid- to late S phase. This role of USP7 mirrors the previously described role for MCM-BP in MCM complex unloading and suggests that USP7 works with MCM-BP to unload MCM complexes from chromatin at the end of S phase.

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Crossref · 10.1128/mcb.00639-13

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  • USP7 TRAF-like domain substrates include p53, Mdm2, Mdm4, and MCM-BP.

    “These substrates include the tumor suppressor p53 (Hu et al., 2006; Sheng et al., 2006), the Mdm2 E3 ubiquitin ligase (Hu et al., 2006; Sheng et al., 2006; Sarkari et al., 2010), the Mdm2 homolog Mdm4 (Sarkari et al., 2010) and mini-chromosome maintenance binding-protein MCM-BP (Jagannathan et al., 2014; Figure 1 and Table 1).”

    From USP7 Is a Master Regulator of Genome Stability (2020) · cites this paper as Jagannathan et al., 2014

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Authors
Jagannathan, M., Nguyen, T., Gallo, D., Luthra, N., Brown, G. W., Saridakis, V., & Frappier, L.
Affiliations
  • University of Toronto (CA)
  • York University (CA)
Venue
Molecular and Cellular Biology
Published
2014-01-01
Volume
34
Issue
1
Pages
132-145
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2135682361
Cited by
71
References
70
Citations by year
2026: 5 · 2025: 7 · 2024: 3 · 2023: 5 · 2022: 4 · 2021: 7 · 2020: 4 · 2019: 7 · 2018: 8 · 2017: 4 · 2016: 7 · 2015: 4 · 2014: 6
FWCI
2.54
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MOP79368, 106583, 84306)
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, MCM complex, DNA replication, chromatin, TRAF domain, protein-protein interaction, late S phase, ubiquitin-specific protease
MeSH terms
Ubiquitin-Specific Peptidase 7, Animals, Cells, Cultured, Chromatin, DNA Replication, Flow Cytometry, HeLa Cells, Humans, Models, Molecular, Nuclear Proteins, Protein Binding, Blotting, Western, G1 Phase, S Phase, Protein Structure, Tertiary, Crystallography, X-Ray, Cell Cycle Proteins, RNA Interference, Ubiquitin Thiolesterase, HCT116 Cells, Adaptor Proteins, Signal Transducing, HEK293 Cells, Minichromosome Maintenance Complex Component 7

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