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Protein kinase C isotypes controlled by phosphoinositide 3-kinase through the protein kinase PDK1.

Science (New York, N.Y.) | Sep 25, 1998

http://www.ncbi.nlm.nih.gov/pubmed/9748166

Phosphorylation sites in members of the protein kinase A (PKA), PKG, and PKC kinase subfamily are conserved. Thus, the PKB kinase PDK1 may be responsible for the phosphorylation of PKC isotypes. PDK1 phosphorylated the activation loop sites of PKCzeta and PKCdelta in vitro and in a phosphoinositide 3-kinase (PI 3-kinase)-dependent manner in vivo in human embryonic kidney (293) cells. All members of the PKC family tested formed complexes with PDK1. PDK1-dependent phosphorylation of PKCdelta in vitro was stimulated by combined PKC and PDK1 activators. The activation loop phosphorylation of PKCdelta in response to serum stimulation of cells was PI 3-kinase-dependent and was enhanced by PDK1 coexpression.

Pubmed ID: 9748166 RIS Download

Mesh terms: 3-Phosphoinositide-Dependent Protein Kinases | Binding Sites | Cell Line | Chromones | Enzyme Activation | Enzyme Inhibitors | Humans | Isoenzymes | Morpholines | Phosphatidylcholines | Phosphatidylinositol 3-Kinases | Phosphatidylinositol Phosphates | Phosphatidylserines | Phosphorylation | Protein Kinase C | Protein Kinase C beta | Protein-Serine-Threonine Kinases | Recombinant Proteins | Tetradecanoylphorbol Acetate

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