Cited by 57DNA Repair MechanismsUbiquitin and proteasome pathwaysEpigenetics and DNA Methylation

The deubiquitinase USP38 promotes NHEJ repair through regulation of HDAC1 activity and regulates cancer cell response to genotoxic insults

Yang, Yongfeng, Yang, Chuanzhen, Li, Tingting, Yu, Shuyu, Gan, Tingting, Hu, Jiazhi, Cui, Jun, Zheng, Xiaofeng·2020·Cancer Research

Published version of a preprint

Abstract

The DNA damage response (DDR) is essential for maintaining genome integrity. Mounting evidence reveals that protein modifications play vital roles in the DDR. Here, we show that USP38 is involved in the DDR by regulating the activity of HDAC1. In response to DNA damage, USP38 interacted with HDAC1 and specifically removed the K63-linked ubiquitin chain promoting the deacetylase activity of HDAC1. As a result, HDAC1 was able to deacetylate H3K56. USP38 deletion resulted in persistent focal accumulation of nonhomologous end joining (NHEJ) factors at DNA damage sites and impaired NHEJ efficiency, causing genome instability and sensitizing cancer cells to genotoxic insults. Knockout of USP38 rendered mice hypersensitive to irradiation and shortened survival. In addition, USP38 was expressed at low levels in certain types of cancers including renal cell carcinoma, indicating dysregulation of USP38 expression contributes to genomic instability and may lead to tumorigenesis. In summary, this study identifies a critical role of USP38 in modulating genome integrity and cancer cell resistance to genotoxic insults by deubiquitinating HDAC1 and regulating its deacetylation activity. SIGNIFICANCE: This study demonstrates that USP38 regulates genome stability and mediates cancer cell resistance to DNA-damaging therapy, providing insight into tumorigenesis and implicating USP38 as a potential target for cancer diagnosis.

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Crossref · 10.1158/0008-5472.can-19-2149

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Authors
Yang, Y., Yang, C., Li, T., Yu, S., Gan, T., Hu, J., Cui, J., & Zheng, X.
Affiliations
  • Peking University (CN)
  • National Center of Biomedical Analysis (CN)
  • Sun Yat-sen University (CN)
Venue
Cancer Research
Published
2020-02-14
Volume
80
Issue
4
Pages
719-731
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2998252000
Cited by
57
References
55
Citations by year
2026: 4 · 2025: 16 · 2024: 14 · 2023: 4 · 2022: 12 · 2021: 6 · 2020: 1
FWCI
1.57
Type
journal article
Language
en
Open access
closed
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (81730080, 31670786)
  • National Key Research and Development Program of China (2016YFC1302401)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
deubiquitination, HDAC1, non-homologous end joining, DNA damage response, K63-linked ubiquitin, genome stability, genotoxic stress resistance, radiosensitivity, renal cell carcinoma, carcinogenesis, cancer therapy targets
MeSH terms
Acetylation, Animals, Fibroblasts, HeLa Cells, Histones, Humans, Neoplasms, Radiation Tolerance, Whole-Body Irradiation, Mice, Knockout, Genomic Instability, Mice, DNA Breaks, Double-Stranded, Ubiquitination, Histone Deacetylase 1, HEK293 Cells, DNA End-Joining Repair, Ubiquitin-Specific Proteases

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