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- W1994170015 abstract "Human glioblastoma is the most frequent and aggressive form of brain tumour in the adult population. Proteolytic turnover of tumour suppressors by the ubiquitin–proteasome system is a mechanism that tumour cells can adopt to sustain their growth and invasiveness. However, the identity of ubiquitin–proteasome targets and regulators in glioblastoma are still unknown. Here we report that the RING ligase praja2 ubiquitylates and degrades Mob, a core component of NDR/LATS kinase and a positive regulator of the tumour-suppressor Hippo cascade. Degradation of Mob through the ubiquitin–proteasome system attenuates the Hippo cascade and sustains glioblastoma growth in vivo. Accordingly, accumulation of praja2 during the transition from low- to high-grade glioma is associated with significant downregulation of the Hippo pathway. These findings identify praja2 as a novel upstream regulator of the Hippo cascade, linking the ubiquitin proteasome system to deregulated glioblastoma growth. Tumour suppressors can be inactivated in cancer not only as a result of mutation, but also by proteolytic degradation. Here the authors show that, during glioma development, the accumulation of the ubiquitin ligase praja2 sustains tumour growth by degrading MOB1—a core component of the Hippo pathway." @default.
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- W1994170015 date "2013-05-07" @default.
- W1994170015 modified "2023-10-18" @default.
- W1994170015 title "Proteolysis of MOB1 by the ubiquitin ligase praja2 attenuates Hippo signalling and supports glioblastoma growth" @default.
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- W1994170015 doi "https://doi.org/10.1038/ncomms2791" @default.
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