USP7 and VCPFAF1 define the SUMO/Ubiquitin landscape at the DNA replication fork.
Cell Rep
; 37(2): 109819, 2021 10 12.
Article
em En
| MEDLINE
| ID: mdl-34644576
ABSTRACT
The AAA+ ATPase VCP regulates the extraction of SUMO and ubiquitin-modified DNA replication factors from chromatin. We have previously described that active DNA synthesis is associated with a SUMO-high/ubiquitin-low environment governed by the deubiquitylase USP7. Here, we unveil a functional cooperation between USP7 and VCP in DNA replication, which is conserved from Caenorhabditis elegans to mammals. The role of VCP in chromatin is defined by its cofactor FAF1, which facilitates the extraction of SUMOylated and ubiquitylated proteins that accumulate after the block of DNA replication in the absence of USP7. The inactivation of USP7 and FAF1 is synthetically lethal both in C. elegans and mammalian cells. In addition, USP7 and VCP inhibitors display synergistic toxicity supporting a functional link between deubiquitylation and extraction of chromatin-bound proteins. Our results suggest that USP7 and VCPFAF1 facilitate DNA replication by controlling the balance of SUMO/Ubiquitin-modified DNA replication factors on chromatin.
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Assunto principal:
Cromatina
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Proteínas Adaptadoras de Transdução de Sinal
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Replicação do DNA
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Proteínas Reguladoras de Apoptose
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Ubiquitinação
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Peptidase 7 Específica de Ubiquitina
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Proteína com Valosina
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article