Family of proteins that interact with TFIID and regulate promoter activity.
A family of proteins was shown to bind cooperatively with TFIID to core promoters, as previously demonstrated for the general initiation factor TFIIA. These factors form distinct complexes with TFIID, fail to bind DNA in the absence of TFIID, differ chromatographically from TFIIA, and compete with TFIIA for binding to TFIID. Our results suggest the formation of heterogeneous preinitiation complexes at the step involving TFIIA interactions. This establishes a molecular switch that regulates basal level transcription in vitro and has consequences for transcriptional activation by gene-specific activators.
Laboratory of Biochemistry and Molecular Biology, Rockefeller University, New York, New York 10021.
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D004268:DNA-Binding Proteins / Q000378:metabolism; D005656:Fungal Proteins / Q000378:metabolism; D005786:Gene Expression Regulation; D006801:Humans; D046911:Macromolecular Substances; D009687:Nuclear Proteins / Q000378:metabolism*; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D011994:Recombinant Proteins; D012045:Regulatory Sequences, Nucleic Acid; D012441:Saccharomyces cerevisiae / Q000235:genetics; D035561:Transcription Factor TFIIA; D035362:Transcription Factor TFIID; D014157:Transcription Factors / Q000378:metabolism*; D014158:Transcription, Genetic
D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D046911:Macromolecular Substances; D009687:Nuclear Proteins; D011994:Recombinant Proteins; D035561:Transcription Factor TFIIA; D035362:Transcription Factor TFIID; D014157:Transcription Factors