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Disabled 1 Is Part of a Signaling Pathway Activated by Epidermal Growth Factor Receptor
Paula Dlugosz1, Magdalena Teufl1, Maximilian Schwab1
1Max Perutz Laboratories, Department of Medical Biochemistry, Medical University Vienna, 1030 Vienna, Austria.
Abstract:
Disabled 1 (Dab1) is an adapter protein for very low density lipoprotein receptor (VLDLR) and apolipoprotein E receptor 2 (ApoER2) and an integral component of the Reelin pathway which orchestrates neuronal layering during embryonic brain development. Activation of Dab1 is induced by binding of Reelin to ApoER2 and VLDLR and phosphorylation of Dab1 mediated by Src family kinases. Here we show that Dab1 also acts as an adaptor for epidermal growth factor receptor (EGFR) and can be phosphorylated by epidermal growth factor (EGF) binding to EGFR. Phosphorylation of Dab1 depends on the kinase activity of EGFR constituting a signal pathway independent of Reelin and its receptors.
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