To investigate Saccharomyces cerevisiae 3'-end-processing signals, a set of 1352 unique pre-mRNA 3'-end-processing sites, corresponding to 861 different genes, was identified by alignment of expressed sequence tag sequences with the complete yeast genome. Nucleotide word frequencies in the vicinity of the cleavage sites were analyzed to reveal the signal element features. In addition to previously recognized processing signals, two previously uncharacterized components of the 3'-end-processing signal sequence were discovered, specifically a predominance of U-rich sequences located on either side of the cleavage site. One of these, the downstream U-rich signal, provides a further link between the 3'-end-processing mechanisms of yeast and higher eukaryotes. Analysis of the complete set of 3'-end-processing sites by means of a discrimination function supports a 'contextual' model in which the sum total effectiveness of the signals in all four elements determines whether or not processing occurs.
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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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