title: Binding of transcription factors and creation of a large nucleoprotein complex on the human cytomegalovirus enhancer.
abstract: The effect of the human cytomegalovirus immediate early region 1 enhancer on transcription was studied in vitro with HeLa cell nuclear extract. Stimulation of in vitro transcription mediated by the enhancer element involves its recognition by specific trans-acting factors present in the nuclear extract. DNase I protection analysis was used to determine at the nucleotide level those enhancer sequences that interact with nuclear factors. At least nine sites of protein-DNA interaction were detected over approximately 400 base pairs of enhancer sequence. The regions of nuclease protection are associated with 21-, 19-, 18-, and 17-base-pair repeat elements as well as with a unique sequence, creating a large nucleoprotein complex. The relationship between the protein binding and the activity of the immediate early region 1 enhancer is discussed.
mesh_terms: D001483:Base Sequence; D002467:Cell Nucleus / Q000378:metabolism; D003587:Cytomegalovirus / Q000235:genetics* / Q000378:metabolism; D004742:Enhancer Elements, Genetic; D005796:Genes; D005809:Genes, Regulator; D005814:Genes, Viral; D006367:HeLa Cells / Q000378:metabolism; D006801:Humans; D010957:Plasmids; D011401:Promoter Regions, Genetic; D013698:Templates, Genetic; D014157:Transcription Factors / Q000378:metabolism*; D014158:Transcription, Genetic
chemical_list: D014157:Transcription Factors