Chromosome segregation depends on a regulated connection between spindle microtubules and centromeric DNA. The kinetochore mediates this connection and ensures it persists during anaphase, when sister chromatids must transit into daughter cells uninterrupted. The Ctf19 complex (Ctf19c) forms the centromeric base of the kinetochore in budding yeast. Biochemical experiments show that Ctf19c members associate hierarchically when purified from cell extract [1], an observation that is mostly explained by the structure of the complex [2]. The Ctf3 complex (Ctf3c), which is not required for the assembly of most other Ctf19c factors, disobeys the biochemical assembly hierarchy when observed in dividing cells that lack more basal components [3]. Thus, the biochemical experiments do not completely recapitulate the logic of centromeric Ctf19c assembly. We now present a high-resolution structure of the Ctf3c bound to the Cnn1-Wip1 heterodimer. Associated live-cell imaging experiments provide a mechanism for Ctf3c and Cnn1-Wip1 recruitment to the kinetochore. The mechanism suggests feedback regulation of Ctf19c assembly and unanticipated similarities in kinetochore organization between yeast and vertebrates.
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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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| Evidence ID | Analyze ID | File | Description |
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