We previously demonstrated that mRNAs retained in the nucleus of Saccharomyces cerevisiae are subjected to a degradation system-designated DRN (degradation of mRNA in the nucleus), that is diminished in cbc1-Delta or cbc2-Delta mutants lacking components of the cap-binding complex and in rrp6-Delta mutants lacking Rrp6p, a 3' to 5' nuclear exonuclease. Two mutants, lys2-187 and lys2-121, were uncovered by screening numerous lys2 mutants for suppression by cbc1-Delta and rrp6-Delta. Both mutants were identical and contained the two base changes, one of which formed a TGA nonsense codon. LYS2 mRNAs from the lys2-187 and related mutants were rapidly degraded, and the degradation was suppressed by cbc1-Delta and rrp6-Delta. The U1A-GFP imaging procedure was used to show that the lys2-187 mRNA was partially retained in the nucleus, explaining the susceptibility to DRN. The creation of several derivatives of lys2-187 by site-directed mutagenesis revealed that the in-frame TGA by itself was not responsible for the increased susceptibility to DRN. Thus, mRNAs susceptible to DRN can be formed by a 2-bp change. Furthermore, this "retention signal" causing susceptibility to DRN is lost by altering one of the base pairs, establishing that mRNAs susceptible and unsusceptible to DRN can be attributed to a single nucleotide in the proper context.
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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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Evidence ID | Analyze ID | File | Description |
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