The transcription elongation factor S-II, also designated TFIIS, stimulates the nascent transcript cleavage activity intrinsic to RNA polymerase II. Rpb9, a small subunit of RNA polymerase II, enhances the cleavage stimulation activity of S-II. Here, we investigated the role of nascent transcript cleavage stimulation activity on the maintenance of transcriptional fidelity in yeast. In yeast, S-II is encoded by the DST1 gene. Disruption of the DST1 gene decreased transcriptional fidelity in cells. Mutations in the DST1 gene that reduce the S-II cleavage stimulation activity led to decreased transcriptional fidelity in cells. A disruption mutant of the RPB9 gene also had decreased transcriptional fidelity. Expression of mutant Rpb9 proteins that are unable to enhance the S-II cleavage stimulation activity failed to restore the phenotype. These results suggest that both S-II and Rpb9 maintain transcriptional fidelity by stimulating the cleavage activity intrinsic to RNA polymerase II. Also, a DST1 and RPB9 double mutant had more severe transcriptional fidelity defect compared with the DST1 gene deletion mutant, suggesting that Rpb9 maintains transcriptional fidelity via two mechanisms, enhancement of S-II dependent cleavage stimulation and S-II independent function(s).
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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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