Saccharomyces cerevisiae A49 and mouse PAF53 are subunits specific to RNA polymerase I (Pol I) in eukaryotes. It has been known that Pol I without A49 or PAF53 maintains non-specific transcription activities but a molecular role(s) of A49 (and PAF53) remains totally unknown. We studied the fission yeast gene encoding a protein of 415 amino acids exhibiting 30% and 19% identities to A49 and PAF53, respectively. We designate the corresponding protein RPA51 and gene encoding it rpa51+ since the gene encodes a Pol I subunit and an apparent molecular mass of the protein is 51 kDa. rpa51+ is required for cell growth at lower but not at higher temperatures and is able to complement S. cerevisiae rpa49Delta mutation, indicating that RPA51 is a functionally-conserved subunit of Pol I between the budding yeast and the fission yeast. Deletion analysis of rpa51+ shows that only two-thirds of the C-terminal region are required for the function. Transcripts analysis in vivo and in vitro shows that RPA51 plays a general role for maximizing transcription of rDNA whereas it is dispensable for non-specific transcription. We also found that RPA51 associates significantly with Pol I in the stationary phase, suggesting that Pol I inactivation in the stationary phase of yeast does not result from the RPA51 dissociation.
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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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