Mouse RNA polymerase I (or A) was purified from an ascites cell line MH134 to virtual homogeneity using a novel purification procedure and examined for subunit composition. In marked contrast to older purifications that reported 5-8 subunits, polymerase I was found to have 11 subunits with remarkable correspondence to those of yeasts. The cDNA encoding a 40-kDa subunit of this enzyme, designated RPA40, was isolated. It predicts a polypeptide of 355 amino acids (M(r) = 40,065) and is encoded by a single copy gene. Protein sequence analysis reveals that RPA40 is the homolog of yeast RPC40, having homology to alpha subunit of Escherichia coli RNA polymerase, yeast RPB3, and human RPB33 RNA polymerase II subunits. The high conservation of this subunit among distant eukaryotes and different RNA polymerases suggests functional importance of this protein as a core subunit.
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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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