SCFFbxo9 and CK2 direct the cellular response to growth factor withdrawal via Tel2/Tti1 degradation and promote survival in multiple myeloma

作者: Vanesa Fernández-Sáiz , Bianca-Sabrina Targosz , Simone Lemeer , Ruth Eichner , Christian Langer

DOI: 10.1038/NCB2651

关键词:

摘要: The Tel2 (also known as Telo2) and Tti1 proteins control the cellular abundance of mammalian PIKKs are integral components mTORC1 mTORC2. Here we report that targeted for degradation within by SCFFbxo9 ubiquitin ligase to adjust mTOR signalling growth factor availability. This process is primed CK2, which translocates cytoplasm mediate mTORC1-specific phosphorylation Tel2/Tti1, subsequent deprivation. As a consequence, inactivated restrain cell protein translation whereas relief feedback inhibition activates PI(3)K/TORC2/Akt pathway sustain survival. Significantly, primary human multiple myelomas exhibit high levels Fbxo9. In this setting, survival myeloma cells dependent on Fbxo9 expression. Thus, represents central regulatory mechanism with implications in myeloma, both promoting providing targets specific treatment

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