Open AccessDCAF13 promotes breast cancer cell proliferation by ubiquitin inhibiting PERP expression
Author(s) -
Shan BaoQian,
Wang XiaoMin,
Zheng Li,
Han Yao,
Gao Jie,
Lv MengDan,
Zhang Yi,
Liu YiXuan,
Zhang Han,
Chen HaoSa,
Ao Lei,
Zhang YinLi,
Lu Xiang,
Wu ZhongJie,
Xu Ying,
Che Xuan,
Heger Michal,
Cheng ShuQun,
Pan WeiWei,
Zhang Xin
Publication year - 2022
Publication title -
cancer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.035
H-Index - 141
eISSN - 1349-7006
pISSN - 1347-9032
DOI - 10.1111/cas.15300
Subject(s) - cullin , ubiquitin ligase , gene knockdown , ubiquitin , biology , cancer research , cell growth , cell cycle , dna damage , cancer , small hairpin rna , microbiology and biotechnology , apoptosis , genetics , dna , gene
Evolutionarily conserved DDB1‐and CUL4‐associated factor 13 (DCAF13) is a recently discovered substrate receptor for the cullin RING‐finger ubiquitin ligase 4 (CRL4) E3 ubiquitin ligase that regulates cell cycle progression. DCAF13 is overexpressed in many cancers, although its role in breast cancer is currently elusive. In this study we demonstrate that DCAF13 is overexpressed in human breast cancer and that its overexpression closely correlates with poor prognosis, suggesting that DCAF13 may serve as a diagnostic marker and therapeutic target. We knocked down DCAF13 in breast cancer cell lines using CRISPR/Cas9 and found that DCAF13 deletion markedly reduced breast cancer cell proliferation, clone formation, and migration both in vitro and in vivo . In addition, DCAF13 deletion promoted breast cancer cell apoptosis and senescence, and induced cell cycle arrest in the G1/S phase. Genome‐wide RNAseq analysis and western blotting revealed that loss of DCAF13 resulted in both mRNA and protein accumulation of p53 apoptosis effector related to PMP22 (PERP). Knockdown of PERP partially reversed the hampered cell proliferation induced by DCAF13 knockdown. Co‐immunoprecipitation assays revealed that DCAF13 and DNA damage‐binding protein 1 (DDB1) directly interact with PERP. Overexpression of DDB1 significantly increased PERP polyubiquitination, suggesting that CRL4 DCAF13 E3 ligase targets PERP for ubiquitination and proteasomal degradation. In conclusion, DCAF13 and the downstream effector PERP occupy key roles in breast cancer proliferation and potentially serve as prognostics and therapeutic targets.