Three yeast snRNAs (snR20, snR7, and snR14) have been implicated in pre-mRNA splicing. snR20 and snR7 contain domains of homology to U2 and U5, respectively, and each is required for viability. These RNAs are found associated with the spliceosome, as is snR14. We show here that snR14 is also an essential gene product. Sequence analysis reveals that, like snR7 and snR20, snR14 contains a consensus binding site for the Sm antigen, a feature common to all mammalian snRNAs involved in splicing. Moreover, snR14 exhibits several blocks of sequence and structural homology to U4, which in metazoans is found in association with U6. Native gel electrophoresis demonstrates that snR14 is in fact base-paired with another yeast snRNA, designated snR6, which has primary sequence homology to U6. We conclude that snR14 is the yeast analog of U4.
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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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