In the budding yeast Saccharomyces cerevisiae, the calmodulin-binding protein Spc110p/Nuf1p facilitates mitotic spindle formation from the fungal centrosome or spindle pole body (SPB). The human Spc110p orthologue kendrin is a centrosomal, calmodulin-binding pericentrin isoform that is specifically overexpressed in carcinoma cells. Here we establish an evolutionary and functional link between Spc110p and kendrin through identification and analysis of similar calmodulin-binding proteins in the fission yeast Schizosaccharomyces pombe (Pcp1p, pole target of calmodulin in S. pombe) and the filamentous fungus Aspergillus nidulans. Like Spc110p and kendrin, Pcp1p and the A. nidulans protein contain predicted coiled-coil secondary structure and a COOH-terminal calmodulin-binding region. Green fluorescent protein fusions of Pcp1p localize to the SPB as analyzed by fluorescence and immunoelectron microscopy. Pcp1p overexpression causes chromosome missegregation, multiple mitotic spindle fragments, and multiple abnormal SPB-like structures, a phenotype remarkably similar to that of many human carcinoma lines, which exhibit chromosome and spindle defects, and supernumerary centrosomes.
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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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