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• W2739416909 abstract "Tumor growth relies on efficient DNA repair to mitigate the detrimental impact of DNA damage associated with excessive cell division. Modulating repair factor function, thus, provides a promising strategy to manipulate malignant growth. Here, we identify the ubiquitin-specific protease USP21 as a positive regulator of BRCA2, a key mediator of DNA repair by homologous recombination. USP21 interacts with, deubiquitinates and stabilizes BRCA2 to promote efficient RAD51 loading at DNA double-strand breaks. As a result, depletion of USP21 decreases homologous recombination efficiency, causes an increase in DNA damage load and impairs tumor cell survival. Importantly, BRCA2 overexpression partially restores the USP21-associated survival defect. Moreover, we show that USP21 is overexpressed in hepatocellular carcinoma, where it promotes BRCA2 stability and inversely correlates with patient survival. Together, our findings identify deubiquitination as a means to regulate BRCA2 function and point to USP21 as a potential therapeutic target in BRCA2-proficient tumors.BRCA2 is essential for the repair of DNA damage; therefore, defects in BRCA2 are associated with tumorigenesis but also with increased susceptibility to genotoxic stress. Here the authors show that USP21 regulates the ability of tumor cells to repair damaged DNA by regulating BRCA2 stability." @default.
• W2739416909 created "2017-07-31" @default.
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• W2739416909 date "2017-07-26" @default.
• W2739416909 modified "2023-10-16" @default.
• W2739416909 title "Ubiquitin-specific protease 21 stabilizes BRCA2 to control DNA repair and tumor growth" @default.
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• W2739416909 doi "https://doi.org/10.1038/s41467-017-00206-2" @default.
• W2739416909 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5526993" @default.
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