RNA-binding protein HuR enhances p53 translation in response to ultraviolet light irradiation.

Published

Journal Article

Exposure to short-wavelength UV light (UVC) strongly induces p53 expression. In human RKO colorectal carcinoma cells, this increase was not due to elevated p53 mRNA abundance, cytoplasmic export of p53 mRNA, or UVC-triggered stabilization of the p53 protein. Instead, p53 translation was potently enhanced after UVC irradiation. The 3' UTR of p53 was found to be a target of the RNA-binding protein HuR in a UVC-dependent manner in vitro and in vivo. HuR-overexpressing RKO cells displayed elevated p53 levels, whereas cells expressing reduced HuR showed markedly diminished p53 abundance and p53 translation. Our results demonstrate a role for HuR in binding to the p53 mRNA and enhancing its translation.

Full Text

Duke Authors

Cited Authors

  • Mazan-Mamczarz, K; Galbán, S; López de Silanes, I; Martindale, JL; Atasoy, U; Keene, JD; Gorospe, M

Published Date

  • July 2003

Published In

Volume / Issue

  • 100 / 14

Start / End Page

  • 8354 - 8359

PubMed ID

  • 12821781

Pubmed Central ID

  • 12821781

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.1432104100

Language

  • eng