We have replaced the 14 nucleotide long intervening sequence of the Saccharomyces cerevisiae SUP6 (ochre) tRNA(Tyr) gene by the 52 nucleotide long second intron of the S. cerevisiae MATa1 gene. Yeast cells containing this modified pre-tRNA showed the typical suppressor phenotype indicating that the MATa1 pre-mRNA intron was exactly excised in vivo from the primary tRNA transcript and a mature and functional tRNA was formed. Several lines of evidence show that the splicing reaction proceeded via the pre-mRNA splicing mechanism: the reaction yielded a lariat shaped excised intron with a lariat shaped intron-exon 2 molecule as intermediate; point mutations in the conserved UAC-UAAC box of the intron impaired splicing of the precursor RNA; in a temperature sensitive rna2 strain splicing of this tRNA precursor was inhibited at the restrictive temperature. Our results imply that in yeast the excision of a pre-mRNA intron is not dependent on the transcription apparatus by which it was generated and that transcription and splicing are uncoupled processes in vivo, too. Furthermore these data demonstrate that recognition of an RNA as a substrate for a pre-mRNA splicing reaction is, at least qualitatively, only intron dependent.
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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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