Mot1, a global repressor of RNA polymerase II transcription, inhibits TBP binding to DNA by an ATP-dependent mechanism.
Basal transcription of many genes in yeast is repressed by Mot1, an essential protein which is a member of the Snf2/Swi2 family of conserved nuclear factors. ADI is an ATP-dependent inhibitor of TATA-binding protein (TBP) binding to DNA that inhibits transcription in vitro. Here we demonstrate that ADI is encoded by the MOT1 gene. Mutation of MOT1 abolishes ADI activity and derepresses basal transcription in vitro and in vivo. Recombinant Mot1 removes TBP from DNA and Mot1 contains an ATPase activity which is essential for its function. Genetic interactions between Mot1 and TBP indicate that their functions are interlinked in vivo. These results provide a general model for understanding the mechanism of action of a large family of nuclear factors involved in processes such as transcription and DNA repair.
Fred Hutchinson Cancer Research Center, Seattle, Washington 98104.
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DT
Auble
K E
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Hansen
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CG
Mueller
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Lane
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Thorner
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Hahn
D000251:Adenosine Triphosphatases / Q000235:genetics / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D001483:Base Sequence; D004265:DNA Helicases / Q000235:genetics / Q000378:metabolism*; D015342:DNA Probes / Q000235:genetics; D004271:DNA, Fungal / Q000235:genetics / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D005800:Genes, Fungal; D008954:Models, Biological; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D012319:RNA Polymerase II / Q000235:genetics*; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins; D016385:TATA Box; D035381:TATA-Binding Protein Associated Factors; D035181:TATA-Box Binding Protein; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic
D015342:DNA Probes; D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D035381:TATA-Binding Protein Associated Factors; D035181:TATA-Box Binding Protein; D014157:Transcription Factors; D000255:Adenosine Triphosphate; D012319:RNA Polymerase II; D000251:Adenosine Triphosphatases; C073676:MOT1 protein, S cerevisiae; D004265:DNA Helicases