Yeast Taf1p is an integral component of the multiprotein transcription factor TFIID. By using coimmunoprecipitation assays, coupled with a comprehensive set of deletion mutants encompassing the entire open reading frame of TAF1, we have discovered an essential role of a small portion of yeast Taf1p. This domain of Taf1p, termed region 4, consisting of amino acids 200 to 303, contributes critically to the assembly and stability of the 15-subunit TFIID holocomplex. Region 4 of Taf1p is mutationally sensitive, can assemble several Tafps into a partial TFIID complex, and interacts directly with Taf4p and Taf6p. Mutations in Taf1p-region 4 induce temperature-conditional growth of yeast cells. At the nonpermissive temperature these mutations have drastic effects on both TFIID integrity and mRNA synthesis. These data are consistent with the hypothesis that Taf1p subserves a critical scaffold function within the TFIID complex. The significance of these data with regard to TFIID structure and function is discussed.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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