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- W2972597458 abstract "Aberrant expression of p53 and its downstream gene p21 is closely related to alterations in cell cycle and cell proliferation, and is common among cancer patients. However, the underlying molecular mechanism has not been fully unravelled. ZER6 is a zinc-finger protein with two isoforms possessing different amino termini (N-termini) in their proteins, p52-ZER6 and p71-ZER6. The biological function of ZER6 isoforms, as well as their potential involvement in tumourigenesis and the regulation of p53 remain elusive.The effect of ZER6 isoforms on p53 and p21 was determined using specific knockdown and overexpression. p52-ZER6 expression in tumours was analysed using clinical specimens, while gene modulation was used to explore p52-ZER6 roles in regulating cell proliferation and tumourigenesis. The mechanism of p52-ZER6 regulation on the p53/p21 axis was studied using molecular biology and biochemical methods.p52-ZER6 was highly expressed in tumour tissues, and was closely related with tumour progression. Mechanistically, p52-ZER6 bound to p53 through a truncated KRAB (tKRAB) domain in its N-terminus and enhanced MDM2/p53 complex integrity, leading to increased p53 ubiquitination and degradation. p52-ZER6-silencing induced G0-G1 phase arrest, and subsequently reduced cell proliferation and tumourigenesis. Intriguingly, this regulation on p53 was specific to p52-ZER6, whereas p71-ZER6 did not affect p53 stability, most likely due to the presence of a HUB-1 domain.We identified p52-ZER6 as a novel oncogene that enhances MDM2/p53 complex integrity, and might be a potential target for anti-cancer therapy." @default.
- W2972597458 created "2019-09-19" @default.
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- W2972597458 date "2019-10-01" @default.
- W2972597458 modified "2023-10-17" @default.
- W2972597458 title "Zinc-finger protein p52-ZER6 accelerates colorectal cancer cell proliferation and tumour progression through promoting p53 ubiquitination" @default.
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- W2972597458 doi "https://doi.org/10.1016/j.ebiom.2019.08.070" @default.
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