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• W3037836598 abstract "Mechanisms coupling the atypical PKC (aPKC) kinase activity to its subcellular localization are essential for cell polarization. Unlike other members of the PKC family, aPKC has no well-defined plasma membrane (PM) or calcium binding domains, leading to the assumption that its subcellular localization relies exclusively on protein–protein interactions. Here we show that in both Drosophila and mammalian cells, the pseudosubstrate region (PSr) of aPKC acts as a polybasic domain capable of targeting aPKC to the PM via electrostatic binding to PM PI4P and PI(4,5)P2. However, physical interaction between aPKC and Par-6 is required for the PM-targeting of aPKC, likely by allosterically exposing the PSr to bind PM. Binding of Par-6 also inhibits aPKC kinase activity, and such inhibition can be relieved through Par-6 interaction with apical polarity protein Crumbs. Our data suggest a potential mechanism in which allosteric regulation of polybasic PSr by Par-6 couples the control of both aPKC subcellular localization and spatial activation of its kinase activity." @default.
• W3037836598 created "2020-07-02" @default.
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• W3037836598 date "2020-06-24" @default.
• W3037836598 modified "2023-10-15" @default.
• W3037836598 title "A polybasic domain in aPKC mediates Par6-dependent control of membrane targeting and kinase activity" @default.
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• W3037836598 doi "https://doi.org/10.1083/jcb.201903031" @default.
• W3037836598 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7337507" @default.
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