Yes-associated protein 1 regulates the stability of DeltaNp63alpha.

Regulation of DeltaNp63alpha can be achieved at the transcriptional and post-translational levels, with the latter being greatly influenced by external stimuli such as DNA damaging agents. In this present study, we demonstrated that DeltaNp63alpha physical interacts with Yes-associated protein 1 (Yap1). Ectopic expression of Yap1 decreased the stability and the half-like of DeltaNp63alpha and resulted in ubiquitin-dependent degradation of DeltaNp63alpha. Further, the cisplatin mediated degradation of DeltaNp63alpha is attenuated with the downregulation of Yap1. Thus, our results strongly suggest that Yap1 plays a role in the regulation of endogenous DeltaNp63alpha levels and is likely to contribute to the regulation of DeltaNp63alpha, in physiological conditions.