Analysis of EphA4 receptor tyrosine kinase substrate specificity using peptide-based arrays
2008
Warner, Neil | Wybenga-Groot, Leanne E. | Pawson, Tony
Eph receptor tyrosine kinases regulate many important biological processes. In the present study, we explored the substrate specificity of the EphA4 receptor tyrosine kinase using peptide arrays. We define a consensus substrate motif for EphA4 and go on to identify and test a number of potential EphA4 substrates and map their putative site(s) of phosphorylation. Cotransfection studies validate two of the predicted substrates: Nck2 and Dok1. Our findings identify several potential EphA4 substrates and demonstrate the general utility of using peptide arrays to rapidly identify and map protein kinase phosphorylation sites.
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