In Saccharomyces cerevisiae the function of the RN A1 gene is believed to be required for the transport of newly synthesized mRNA from the nucleus to the cytoplasm. Nuclear poly(A)+ RNAs accumulate and cytoplasmic mRNAs decay after the temperature-sensitive (ts) rna1.1 mutant is shifted from 25 degrees C to 37 degrees C. In this study the 3' poly(A) upon poly(A)+ RNA synthesized after expression of rna1.1 was shown to be appreciably longer than the poly(A) normally present on yeast cytoplasmic mRNA. This increased poly(A) length is due to rna1.1, since it was found only in this mutant after a 25 degrees C to 37 degrees C heat shock, not an intragenic non-ts revertant of rna1.1, wild-type (RN A1+) cells or a RN A1+, rna2.1 mutant subjected to equivalent heat shocks. It may be an indication that the normal shortening of the poly(A) on mRNAs does not occur in the nucleus, but happens only with transport to the cytoplasm. Alterations in the mean size of poly(A) may be a relatively simple marker for mRNA transport defects.
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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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