The pedigree of mating-type switching in yeast is determined by the transcription pattern of the HO endonuclease gene, which is expressed during late G1 in mother cells but not at all in daughter cells. The late-G1 specificity of HO transcription depends on a heteromeric factor, SBF, which is composed of the Swi4 and Swi6 proteins. Mother-cell specificity involves a second site-specific DNA-binding factor, Swi5, which is synthesized in the G2 and M phases and only enters the nucleus at the end of mitosis. Swi5 enters mother and daughter nuclei in equal amounts and most is then rapidly degraded. It has been suggested that in mothers but not in daughters some Swi5 protein escapes degradation and persists until SBF is activated in late G1. This subset of Swi5 molecules may constitute a mother cell's memory.
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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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