Identification of a factor in HeLa cells specific for an upstream transcriptional control sequence of an EIA-inducible adenovirus promoter and its relative abundance in infected and uninfected cells.
Utilizing the gel electrophoresis/DNA binding assay, a factor specific for the upstream transcriptional control sequence of the EIA-inducible adenovirus EIIA-early promoter has been detected in HeLa cell nuclear extract. Analysis of linker-scanning mutants of the promoter by DNA binding assays and methylation-interference experiments show that the factor binds to the 17-nucleotide sequence 5' TGGAGATGACGTAGTTT 3' located between positions -66 and -82 upstream from the cap site. This sequence has been shown to be essential for transcription of this promoter. The EIIA-early-promoter specific factor was found to be present at comparable levels in uninfected HeLa cells and in cells infected with either wild-type adenovirus or the EIA-deletion mutant dl312 under conditions in which the EIA proteins are induced to high levels [7 or 20 hr after infection in the presence of arabinonucleoside (cytosine arabinoside)]. Based on the quantitation in DNA binding assays, it appears that the mechanism of EIA-activated transcription of the EIIA-early promoter does not involve a net change in the amounts of this factor.
D017456:Adenovirus Early Proteins; D000260:Adenoviruses, Human / Q000235:genetics*; D001483:Base Sequence; D002472:Cell Transformation, Viral; D005796:Genes; D005814:Genes, Viral; D006367:HeLa Cells / Q000378:metabolism; D006801:Humans; D009856:Oncogene Proteins, Viral / Q000235:genetics*; D010957:Plasmids; D011401:Promoter Regions, Genetic; D014158:Transcription, Genetic
D017456:Adenovirus Early Proteins; D009856:Oncogene Proteins, Viral