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- W2127646052 abstract "ABSTRACT Protein kinase D (PKD) participates in activation of the transcription factor NF-κB (nuclear factor κB) in cells exposed to oxidative stress, leading to increased cellular survival. We previously demonstrated that phosphorylation of PKD at Tyr463 in the PH (pleckstrin homology) domain is mediated by the Src-Abl pathway and that it is necessary for PKD activation and subsequent NF-κB induction. Here we show that activation of PKD in response to oxidative stress requires two sequential signaling events, i.e., phosphorylation of Tyr463 by Abl, which in turn promotes a second step, phosphorylation of the PKD activation loop (Ser738/Ser742). We show that this is mediated by PKCδ (protein kinase Cδ), a kinase that is activated by Src in response to oxidative stress. We also show that other PKCs, including PKCε and PKCζ, do not participate in PKD activation or NF-κB induction. We propose a model in which two coordinated signaling events are required for PKD activation. Tyrosine phosphorylation in the PH domain at Tyr463, mediated by the Src-Abl pathway, which in turn facilitates the phosphorylation of Ser738/Ser742 in the activation loop, mediated by the Src-PKCδ pathway. Once active, the signal is relayed to the activation of NF-κB in oxidative stress responses." @default.
- W2127646052 created "2016-06-24" @default.
- W2127646052 creator A5062388236 @default.
- W2127646052 creator A5064581175 @default.
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- W2127646052 date "2004-04-01" @default.
- W2127646052 modified "2023-10-12" @default.
- W2127646052 title "Protein Kinase Cδ Selectively Regulates Protein Kinase D-Dependent Activation of NF-κB in Oxidative Stress Signaling" @default.
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- W2127646052 doi "https://doi.org/10.1128/mcb.24.7.2614-2626.2004" @default.
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