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Deprecated: Implicit conversion from float 225.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Res 2014 ; 24 (4): 433-50 Nephropedia Template TP
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PKC? regulates Notch receptor routing and activity in a Notch signaling-dependent manner #MMPMID24662486
Sjöqvist M; Antfolk D; Ferraris S; Rraklli V; Haga C; Antila C; Mutvei A; Imanishi SY; Holmberg J; Jin S; Eriksson JE; Lendahl U; Sahlgren C
Cell Res 2014[Apr]; 24 (4): 433-50 PMID24662486show ga
Activation of Notch signaling requires intracellular routing of the receptor, but the mechanisms controlling the distinct steps in the routing process is poorly understood. We identify PKC? as a key regulator of Notch receptor intracellular routing. When PKC? was inhibited in the developing chick central nervous system and in cultured myoblasts, Notch-stimulated cells were allowed to undergo differentiation. PKC? phosphorylates membrane-tethered forms of Notch and regulates two distinct routing steps, depending on the Notch activation state. When Notch is activated, PKC? promotes re-localization of Notch from late endosomes to the nucleus and enhances production of the Notch intracellular domain, which leads to increased Notch activity. In the non-activated state, PKC? instead facilitates Notch receptor internalization, accompanied with increased ubiquitylation and interaction with the endosomal sorting protein Hrs. Collectively, these data identify PKC? as a key regulator of Notch trafficking and demonstrate that distinct steps in intracellular routing are differentially modulated depending on Notch signaling status.