Sister chromatid separation at the metaphase-to-anaphase transition is induced by the proteolytic cleavage of one of the cohesin complex subunits. This process is mediated by a conserved protease called separase. Separase is associated with its inhibitor, securin, until the time of anaphase initiation, when securin is degraded in an anaphase-promoting complex/cyclosome (APC/C)-dependent manner. In budding yeast securin/Pds1 not only inhibits separase/Esp1, but also promotes its nuclear localization. The molecular mechanism and regulation of this nuclear targeting are presently unknown. Here we show that Pds1 is a substrate of the cyclin-dependent kinase Cdc28. Phosphorylation of Pds1 by Cdc28 is important for efficient binding of Pds1 to Esp1 and for promoting the nuclear localization of Esp1. Our results uncover a previously unknown mechanism for regulating the Pds1-Esp1 interaction and shed light on a novel role for Cdc28 in promoting the metaphase-to-anaphase transition in budding yeast.
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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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