Stabilization of N-Myc is a critical function of Aurora A in human neuroblastoma
- PMID: 19111882
- DOI: 10.1016/j.ccr.2008.12.005
Stabilization of N-Myc is a critical function of Aurora A in human neuroblastoma
Abstract
In human neuroblastoma, amplification of the MYCN gene predicts poor prognosis and resistance to therapy. In a shRNA screen of genes that are highly expressed in MYCN-amplified tumors, we have identified AURKA as a gene that is required for the growth of MYCN-amplified neuroblastoma cells but largely dispensable for cells lacking amplified MYCN. Aurora A has a critical function in regulating turnover of the N-Myc protein. Degradation of N-Myc requires sequential phosphorylation by cyclin B/Cdk1 and Gsk3. N-Myc is therefore degraded during mitosis in response to low levels of PI3-kinase activity. Aurora A interacts with both N-Myc and the SCF(Fbxw7) ubiquitin ligase that ubiquitinates N-Myc and counteracts degradation of N-Myc, thereby uncoupling N-Myc stability from growth factor-dependent signals.
Comment in
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Unholy matrimony: Aurora A and N-Myc as malignant partners in neuroblastoma.Cancer Cell. 2009 Jan 6;15(1):5-6. doi: 10.1016/j.ccr.2008.12.008. Cancer Cell. 2009. PMID: 19111875
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