Aurora-A kinase, also known as STK15/BTAK kinase, is a member of a serine/threonine kinase superfamily that includes the prototypic yeast Ipl1 and Drosophila aurora kinases as well as other mammalian and non-mammalian aurora kinases involved in the regulation of centrosomes and chromosome segregation. The Aurora-A gene is amplified and overexpressed in a wide variety of human tumors. Aurora-A is centrosome-associated during interphase, and binds the poles and half-spindle during mitosis; its over-expression has been associated with centrosome amplification and multipolar spindles. GFP-Aurora-A was used to mark centrosomes and spindles, and monitor their movements in living cells. Centrosome pairs labeled with GFP-Aurora-A are motile throughout interphase undergoing oscillations and tumbling motions requiring intact microtubules and ATP. Fluorescence recovery after photobleaching (FRAP) was used to examine the relative molecular mobility of GFP-Aurora-A, and GFP-labeled alpha-tubulin, gamma-tubulin, and NuMA. GFP-Aurora-A rapidly exchanges in and out of the centrosome and mitotic spindle (t(1/2) approximately 3 sec); in contrast, both tubulins are relatively immobile indicative of a structural role. GFP-NuMA mobility was intermediate in both interphase nuclei and at the mitotic spindle (t(1/2) approximately 23-30 sec). Deletion mapping identifies a central domain of Aurora-A as essential for its centrosomal localization that is augmented by both the amino and the carboxyl terminal ends of the protein. Interestingly, amino or carboxy terminal deletion mutants that maintained centrosomal targeting exhibited significantly slower molecular exchange. Collectively, these studies contrast the relative cellular dynamics of Aurora-A with other cytoskeletal proteins that share its micro-domains, and identify essential regions required for targeting and dynamics.
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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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