It has been proposed that the conditional yeast mutant ts136 is defective in the transport of mRNA from the nucleus to the cytoplasm (Hutchinson, Hartwell and McLaughlin, 1969). We have examined ts136 to determine whether it is defective in tRNA biosynthesis. At the restrictive temperature, the mutant accumulates twelve new species of RNA. These species co-migrate on polyacrylamide gels with some of the pulse-labeled precursor tRNAs. Three of the new RNAs (species 1a, 1b and 1c are large enough to contain two tandom tRNAs. Although RNAs 1a, 1b, and 1c do not contain detectable levels of modified and methylated bases, at least one of them hybridizes to DNA from an E. coli plasmid containing a yeast tRNA gene. All the remaining RNAs (2--8) contain modified and methylated bases typical of tRNA. Three of these species were tested and were found to hybridize to tRNA genes. Ribosomal RNA synthesis is also defective in ts136. It is suggested that ts136 may be defective in a nucleolytic activity, which is a prerequisite to RNA transport.
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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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