Splicing of introns from Saccharomyces cerevisiae pre-mRNA requires the conserved sequence TACTAAC; the 3'-most A residue is utilized as the site of branch formation. We showed previously that the transcript from an actin-HIS4 gene fusion containing the mutation TACTAAC to TACTACC (designated C259) is spliced inefficiently, thereby preventing growth on the histidine precursor histidinol. By selecting for growth on histidinol, we have identified a mutant in which the splicing of the C259 transcript is increased fourfold; splicing of other mutated introns is not significantly improved. The mutant locus encodes a trans-acting suppressor. A single mutation, rna16-1, is sufficient for suppression; however, suppression is maximized in heterozygous diploids containing both rna16-1 and the wild-type allele RNA16. In addition, wild-type pre-mRNAs (and lariat intermediates) accumulate in rna16-1 cells. We propose that the RNA16 locus encodes a component of the splicing machinery.
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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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