PHLDA1 (TDAG51), the product of a gene involved in breast cancer progression, interacts with aurora kinase A (AURKA). While unphosphorylated PHLDA1 promotes AURKA ubiquitination and degradation, AURKA-mediated phosphorylation of PHLDA1 results in down-regulation of PHLDA1 protein levels. Ectopic expression of PHLDA1 strongly antagonizes AURKA-triggered oncogenic phenotypes, suggesting PHLDA1 downregulation as one of the key mechanisms by which AURKA promotes breast cancer (Johnson et al. 2011).
Badve, S, Ghosh, S, Chang, KH, Johnson, EO, Mehta, R, Shah, K, de Pablo, Y
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