Transcription control region within the protein-coding portion of adenovirus E1A genes

T. F. Osborne, D. N. Arvidson, E. S. Tyau, M. Dunsworth-Browne, A. J. Berk

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A single-base deletion within the protein-coding region of the adenovirus type 5 early region 1A (E1A) genes, 399 bases downstream from the transcription start site, depresses transcription to 2% of the wild-type rate. Complementation studies demonstrated that this was due to two effects of the mutation: first, inactivation of an E1A protein, causing a reduction by a factor of 5; second, a defect which acts in cis to depress E1A mRNA and nuclear RNA concentrations by a factor of 10. A larger deletion within the protein-coding region of E1A which overlaps the single-base deletion produces the same phenotype. In contrast, a linker insertion which results in a similar truncated E1A protein does not produce the cis-acting defect in E1A transcription. These results demonstrate that a critical cis-acting transcription control region occurs within the protein coding sequence in adenovirus type 5 E1A. The single-base deletion occurs in a sequence which shows extensive homology with a sequence from the enhancer regions of simian virus 40 and polyomavirus. This region is not required for E1A transcription during the late phase of infection.

Original languageEnglish (US)
Pages (from-to)1293-1305
Number of pages13
JournalMolecular and cellular biology
Issue number7
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology


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