Human Gene Set: OHASHI_AURKA_TARGETS


Standard name OHASHI_AURKA_TARGETS
Systematic name M1180
Brief description Candidate substrate proteins of AURKA [GeneID=6790].
Full description or abstract Mammalian Aurora-A is related to a serine/threonine protein kinase that was originally identified by its close homology with Saccharomyces cerevisiae Ipl1p and Drosophila melanogaster aurora that are key regulators in the orchestration of mitotic events. The protein level of Aurora-A, its peak kinase activity during mitosis, and its activation have been attributed to phosphorylation. Here we show that this enzyme is an arginine-directed kinase and define its substrate specificity. We also found that Thr288 within the activation loop is a critical residue for activating phosphorylation events in vitro and that it is spatiotemporally restricted to a brief window at mitosis on duplicated centrosomes and on spindle microtubules proximal to the poles in vivo. Immunodepletion assays indicated that an upstream kinase(s) of Aurora-A might exist in mammalian cells in addition to autophosphorylation. Furthermore, human activated Aurora-A forms complexes with the negative regulator protein serine/threonine phosphatase type 1 (PP1) that was negatively phosphorylated on Thr320. Interestingly, phospho-specific Aurora-A monoclonal antibodies restrain Aurora-A kinase activity in vitro, providing further therapeutic avenues to explore.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 16785988   Authors: Ohashi S,Sakashita G,Ban R,Nagasawa M,Matsuzaki H,Murata Y,Taniguchi H,Shima H,Furukawa K,Urano T
Exact source Fig 6A
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Source species Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
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Version history 3.1: First introduced

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