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- W1992560829 abstract "Epidermal barrier acquisition during late mammalian development is a prerequisite for terrestrial existence. Over a 24-h period, the epidermis goes from being a barrier-deficient, dye permeable epithelium to a barrier-competent epithelium. We have previously shown that Akt signalling is necessary for barrier acquisition in the mouse and that the protein phosphatase 2A regulatory subunit Ppp2r2a causes barrier acquisition by dephosphorylation of cJun. Here, we demonstrate that there is transient interaction between the gap junction protein Connexin 43 (Cx43) and Zonula occludins-1 (Zo-1) during epidermal barrier acquisition. Ppp2r2a knockdown prevented plasma membrane co-localisation and interaction between the two proteins. Ppp2r2a knockdown also increased phosphorylation at Serine 368 of Connexin 43. Cx43 phosphorlyation at Serine368 occurred just prior to the interaction between Connexin 43 and Zo-1. We therefore propose a model in which Ppp2r2a is required both for the initial interaction between Zo-1 and Cx43 and the consequent dephosphorylation of Connexin 43, preventing interaction of Zo-1 and allowing Zo-1 to initiate tight junction formation and barrier acquisition." @default.
- W1992560829 created "2016-06-24" @default.
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- W1992560829 date "2013-10-29" @default.
- W1992560829 modified "2023-10-11" @default.
- W1992560829 title "The protein phosphatase 2A regulatory subunit Ppp2r2a is required for Connexin-43 dephosphorlyation during epidermal barrier acquisition" @default.
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- W1992560829 doi "https://doi.org/10.1111/exd.12234" @default.
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