We have isolated a cold-sensitive mutant of Saccharomyces cerevisiae in which there is a deficit of 60S ribosomal subunits. Cold sensitivity and the assembly defect are recessive and cosegregate, defining a single essential gene that we designated DRS1 (deficiency of ribosomal subunits). The wild-type DRS1 gene was cloned by complementation of the cold-sensitive phenotype of drs1. Sequence analysis reveals a high degree of similarity to a family of proteins that are thought to function as ATP-dependent RNA helicases. Pulse-chase analysis of ribosomal RNA synthesis and processing indicates that the drs1 mutant accumulates the 27S precursor of the mature 25S rRNA. These results suggest that, as in pre-mRNA splicing, RNA helicase activities are involved in ribosomal RNA processing.
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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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