Abstract:
:The transcription factor KLF5 is highly expressed in basal-like breast cancer and promotes breast cancer cell proliferation, survival, migration and tumour growth. Here we show that, in breast cancer cells, KLF5 is stabilized by the deubiquitinase (DUB) BAP1. With a genome-wide siRNA library screen of DUBs, we identify BAP1 as a bona fide KLF5 DUB. BAP1 interacts directly with KLF5 and stabilizes KLF5 via deubiquitination. KLF5 is in the BAP1/HCF-1 complex, and this newly identified complex promotes cell cycle progression partially by inhibiting p27 gene expression. Furthermore, BAP1 knockdown inhibits tumorigenicity and lung metastasis, which can be rescued partially by ectopic expression of KLF5. Collectively, our findings not only identify BAP1 as the DUB for KLF5, but also reveal a critical mechanism that regulates KLF5 expression in breast cancer. Our findings indicate that BAP1 could be a potential therapeutic target for breast and other cancers.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Qin J,Zhou Z,Chen W,Wang C,Zhang H,Ge G,Shao M,You D,Fan Z,Xia H,Liu R,Chen Cdoi
10.1038/ncomms9471subject
Has Abstractpub_date
2015-09-30 00:00:00pages
8471issn
2041-1723pii
ncomms9471journal_volume
6pub_type
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