We have purified a complex from Saccharomyces cerevisiae containing the spindle components Ndc80p, Nuf2p, Spc25p, and Spc24p. Temperature-sensitive mutants in NDC80, SPC25, and SPC24 show defects in chromosome segregation. In spc24-1 cells, green fluorescence protein (GFP)-labeled centromeres fail to split during spindle elongation, and in addition some centromeres may detach from the spindle. Chromatin immunoprecipitation assays show an association of all four components of the complex with the yeast centromere. Homologues of Ndc80p, Nuf2p, and Spc24p were found in Schizosaccharomyces pombe and GFP tagging showed they were located at the centromere. A human homologue of Nuf2p was identified in the expressed sequence tag database. Immunofluorescent staining with anti-human Nuf2p and with anti-HEC, the human homologue of Ndc80p, showed that both proteins are at the centromeres of mitotic HeLa cells. Thus the Ndc80p complex contains centromere-associated components conserved between yeasts 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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