Induction of c-fos mRNA and AP-1 DNA-binding activity by cAMP in cooperation with either the adenovirus 243- or the adenovirus 289-amino acid E1A protein

D. A. Engel, U. Muller, R. W. Gedrich, J. S. Eubanks, T. Shenk

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Products of the adenovirus E1A gene can act synergistically with cAMP to activate transcription of several viral early genes and the cellular genes c-fos and jun-B. Transcription factor AP-1-binding activity is also induced by the combined action of E1A and cAMP. Mouse S49 cells were infected with adenovirus variants expressing either the 243- or 289-amino acid E1A protein and treated with the cAMP analog dibutyryl-cAMP. Significant E1A-dependent induction of c-fos mRNA and AP-1-binding activity was observed in cells expressing either E1A protein. These effects absolutely required the presence of cAMP. In contrast, the 243-amino acid protein was a poor activator of the viral early genes E2 and E4 compared with the 289-amino acid protein. These data suggest that the 243- and 289-amino acid E1A proteins both interact functionally with the cAMP signaling system to activate transcription of a cellular gene and AP-1-binding activity. The mechanism involved in this process is probably different from the mechanism of transcriptional activation of viral genes.

Original languageEnglish (US)
Pages (from-to)3957-3961
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume88
Issue number9
DOIs
StatePublished - 1991

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • cAMP-dependent protein kinase
  • transcription
  • transcription factor
  • transformation

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