A new regulatory domain on the TATA-binding protein.
Recognition of the TATA box by the TATA-binding protein (TBP) is a highly regulated step in RNA polymerase II-dependent transcription. Several proteins have been proposed to regulate TBP activity, yet the TBP domains responsive to all these regulators have not been defined. Here we describe a new class of TBP mutants that increase transcription from core promoters in vivo. The majority of these mutations alter amino acids that cluster tightly on the TBP surface, defining a new TBP regulatory domain. The mutant TBP proteins are defective for binding the transcriptional regulator yNC2, are resistant to inhibition by yNC2 in vitro and exhibit allele-specific genetic interactions with yNC2. These results provide strong biochemical and genetic evidence that TBP is directly repressed in vivo, and define a new TBP domain important for transcriptional regulation.
Cang
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Y
Department of Molecular Genetics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.
Auble
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DT
Prelich
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D000251:Adenosine Triphosphatases; D000483:Alleles; D004265:DNA Helicases / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000737:chemistry* / Q000235:genetics; D015966:Gene Expression Regulation, Fungal; D005816:Genetic Complementation Test; D008958:Models, Molecular; D016296:Mutagenesis; D010641:Phenotype; D010750:Phosphoproteins / Q000737:chemistry / Q000378:metabolism; D010957:Plasmids; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D012097:Repressor Proteins / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000737:chemistry; D029701:Saccharomyces cerevisiae Proteins; D035381:TATA-Binding Protein Associated Factors; D035181:TATA-Box Binding Protein; D035561:Transcription Factor TFIIA; D014157:Transcription Factors / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic
C403190:BUR6 protein, S cerevisiae; D004268:DNA-Binding Proteins; D010750:Phosphoproteins; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D035381:TATA-Binding Protein Associated Factors; D035181:TATA-Box Binding Protein; D035561:Transcription Factor TFIIA; D014157:Transcription Factors; C075995:down-regulator of transcription 1; D000251:Adenosine Triphosphatases; C073676:MOT1 protein, S cerevisiae; D004265:DNA Helicases