Before anaphase, kinetochores of sister chromatid (SC) pairs must be attached to microtubules emanating from opposing spindle poles. The conserved Aurora B kinase Ipl1 and its adaptor INCENP/Sli15 correct defective attachments and promote SC bi-orientation. Ame1 and Okp1 are essential components of the COMA sub-complex of the budding yeast central kinetochore, and Ame1 has been demonstrated to physically interact with Sli15. Here, we examine the significance of the Ame1-Sli15 interaction in vivo. We find Sli15 localization at kinetochores is reduced in the absence of Ame1. We demonstrate a role for Ame1 in the correction of defective attachments. While overexpression of OKP1 restores kinetochore localization of the mutant Ame1-4 protein, Sli15 localization is not restored and defective attachments are not corrected. Our findings reveal a new role for the central kinetochore in promoting Sli15 function, and suggest functional Ame1 is required for the correction of defective attachments by promoting the localization of Sli15/INCENP at kinetochores.
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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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