A relatively simple subset of general transcription factors is sufficient for transcript initiation by RNA polymerase II. However, a recently identified "holoenzyme" contains additional accessory proteins required for mediating signals from some activators (Y-J. Kim et al., 1994, Cell 77, 599-608; A. Koleske and R. Young, 1994, Nature 368, 466-469). By immobilizing RNA polymerase II and associated proteins (RAPs) from a transcriptionally active yeast extract, we have identified a novel collection of proteins distinct from those found in the holoenzyme. The eluted RAP fraction did not contain the holoenzyme components Srb2,4,5 + 6p, Gal11p, or Sug1p, but did include the known transcription factors TFIIB and TFIIS and the three subunits of yeast TFIIF (Ssu71p/Tfg1p, Tfg2p, and Anc1p/Tfg3p). Also isolated as RAPs are two proteins (Cdc73p and Paf1p) with interesting connections to gene expression. Mutations in CDC73 and PAF1 affect cell growth and the abundance of transcripts from a subset of yeast genes (X. Shi et al., Mol. Cell. Biol., 1996 16, 669-676). The RAP fraction may therefore define one or more functional forms of RNA polymerase II distinct from the activator-mediating holoenzyme.
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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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