Adenovirus E1B oncoprotein tethers a transcriptional repression domain to p53

P. R. Yew, X. Liu, A. J. Berk

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263 Scopus citations


Many DNA tumor viruses express a protein that inhibits transcriptional activation by the tumor-suppressing transcription factor p53. We report that adenovirus E1B 55K represses p53-mediated activation by a mechanism not described previously. E1B 55K binds p53 without displacing it from its DNA- binding site. A fusion of E1B 55K to the GAL4 DNA-binding domain represses transcription from a variety of promoters with engineered upstream GAL4- binding sites. Mutations within E1B 55K that interfere with its transforming activity and its ability to inhibit p53-mediated trans-activation also interfere with transcriptional repression by the GAL4-55K fusion. These results demonstrate that E1B 55K functions as a direct transcriptional repressor that is targeted to p53-responsive genes by binding to p53.

Original languageEnglish (US)
Pages (from-to)190-202
Number of pages13
JournalGenes and Development
Issue number2
StatePublished - 1994
Externally publishedYes


  • Transcriptional repression
  • repressor
  • silencing
  • transformation

ASJC Scopus subject areas

  • Medicine(all)


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