A recessive temperature sensitive mutant has been isolated that is defective in ribosomal RNA processing. By Northern analysis, this mutant was found to accumulate three novel rRNA species: 23S', 18S' and 7S', each of which contains sequences from the spacer region between 25S and 18S rRNA. 35S pre-rRNA accumulates, while the level of the 20S and 27S rRNA processing intermediates is depressed. Pulse-chase analysis demonstrates that the processing of 35S pre-rRNA is slowed. The defect in the mutant appears to be at the first processing step, which generates 20S and 27S rRNA. 7S' RNA is a form of 5.8S RNA whose 5' end is extended by 149 nucleotides to a position just 5 nucleotides downstream of the normal cleavage site that produces 20S and 27S rRNA. 7S' RNA can assemble into 60S ribosomal subunits, but such subunits are relatively ineffective in joining polyribosomes. A single lesion is responsible for the pre-rRNA processing defect and the temperature sensitivity. The affected gene is designated RRP2.
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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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