Distinct p53 transcriptional programs dictate acute DNA-damage responses and tumor suppression

Colleen A. Brady, Dadi Jiang, Stephano S. Mello, Thomas M. Johnson, Lesley A. Jarvis, Margaret M. Kozak, Daniela Kenzelmann Broz, Shashwati Basak, Eunice J. Park, Margaret E. McLaughlin, Anthony Karnezis, Laura D. Attardi

Research output: Contribution to journalArticle

305 Scopus citations

Abstract

The molecular basis for p53-mediated tumor suppression remains unclear. Here, to elucidate mechanisms of p53 tumor suppression, we use knockin mice expressing an allelic series of p53 transcriptional activation mutants. Microarray analysis reveals that one mutant, p5325,26, is severely compromised for transactivation of most p53 target genes, and, moreover, p5325,26 cannot induce G1-arrest or apoptosis in response to acute DNA damage. Surprisingly, p5325,26 retains robust activity in senescence and tumor suppression, indicating that efficient transactivation of the majority of known p53 targets is dispensable for these pathways. In contrast, the transactivation-dead p5325,26,53,54 mutant cannot induce senescence or inhibit tumorigenesis, like p53 nullizygosity. Thus, p53 transactivation is essential for tumor suppression but, intriguingly, in association with a small set of novel p53 target genes. Together, our studies distinguish the p53 transcriptional programs involved in acute DNA-damage responses and tumor suppression - a critical goal for designing therapeutics that block p53-dependent side effects of chemotherapy without compromising p53 tumor suppression.

Original languageEnglish (US)
Pages (from-to)571-583
Number of pages13
JournalCell
Volume145
Issue number4
DOIs
StatePublished - May 13 2011
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Fingerprint Dive into the research topics of 'Distinct p53 transcriptional programs dictate acute DNA-damage responses and tumor suppression'. Together they form a unique fingerprint.

  • Cite this

    Brady, C. A., Jiang, D., Mello, S. S., Johnson, T. M., Jarvis, L. A., Kozak, M. M., Broz, D. K., Basak, S., Park, E. J., McLaughlin, M. E., Karnezis, A., & Attardi, L. D. (2011). Distinct p53 transcriptional programs dictate acute DNA-damage responses and tumor suppression. Cell, 145(4), 571-583. https://doi.org/10.1016/j.cell.2011.03.035