Cleavage and polyadenylation of mRNA 3' ends in Saccharomyces cerevisiae requires several factors, one of which is cleavage factor I (CF I). Purification of CF I activity from yeast extract has implicated numerous proteins as functioning in both cleavage and/or polyadenylation. Through reconstitution of active CF I from separately expressed and purified proteins, we show that CF I contains five subunits, Rna14, Rna15, Pcf11, Clp1, and Hrp1. These five are necessary and sufficient for reconstitution of cleavage activity in vitro when mixed with CF II, and for specific polyadenylation when mixed with polyadenylation factor I, purified poly(A) polymerase, and poly(A) binding protein. Analysis of the individual protein-protein interactions supports an architectural model for CF I in which Pcf11 simultaneously interacts with Rna14, Rna15, and Clp1, whereas Rna14 bridges Rna15 and Hrp1.
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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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