p53 is involved in the p120E4F-mediated growth arrest - PubMed (original) (raw)

. 2000 Jan 13;19(2):188-99.

doi: 10.1038/sj.onc.1203250.

Affiliations

• PMID: 10644996
• DOI: 10.1038/sj.onc.1203250

p53 is involved in the p120E4F-mediated growth arrest

P Sandy et al. Oncogene. 2000.

Abstract

Control of cell growth and division by the p53 tumor suppressor protein requires its abilities to transactivate and repress specific target genes and to associate in complex with other proteins. Here we demonstrate that p53 binds to the E1A-regulated transcription factor p120E4F, a transcriptional repressor of the adenovirus E4 promoter. The interaction involves carboxy-terminal half of p120E4F and sequences located at the end of the sequence-specific DNA-binding domain of p53. Ectopic expression of p120E4F leads to a block of cell proliferation in several human and murine cell lines and this effect requires the association with wild-type (wt) p53. Although p120E4F can also bind to mutant p53, the growth suppression induced by overexpression of the protein is severely reduced in a cell line that contains mutant p53. These data suggest that p120E4F may represent an important element within the complex network of p53 checkpoint functions.

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