Rpa12p is a subunit of RNA polymerase I formed of two zinc-binding domains. The N-terminal zinc region (positions 1-60) is poorly conserved from yeast to man. The C-terminal domain contains an invariant Q.RSADE.T.F motif shared with the TFIIS elongation factor of RNA polymerase II and its archaeal counterpart. Deletions removing the N-terminal domain fail to grow at 34 degrees C, are sensitive to nucleotide-depleting drugs and become lethal in rpa14-Delta mutants lacking the non-essential RNA polymerase I subunit Rpa14p. They also strongly alter the immunofluorescent properties of RNA polymerase I in the nucleolus. Finally, they prevent the binding of Rpa12p to immunopurified polymerase I and impair a specific two-hybrid interaction with the second largest subunit. In all these respects, N-terminal deletions behave like full deletions. In contrast, C-terminal deletions retaining only the first N-terminal 60 amino acids are indistinguishable from wild type. Thus, the N-terminal zinc domain of Rpa12p determines its anchoring to RNA polymerase I and is the only critical part of that subunit in vivo.
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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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