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Tyrosine phosphorylation of the orphan receptor ESDN/DCBLD2 serves as a scaffold for the signaling adaptor CrkL
Author(s) -
Aten Tyler M.,
Redmond Miranda M.,
Weaver Sheila O.,
Love Collin C.,
Joy Ryan M.,
Lapp Aliya S.,
Rivera Osvaldo D.,
Hinkle Karen L.,
Ballif Bryan A.
Publication year - 2013
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2013.05.064
Subject(s) - adapter molecule crk , sh2 domain , signal transducing adaptor protein , phosphorylation , proto oncogene tyrosine protein kinase src , chemistry , tyrosine phosphorylation , microbiology and biotechnology , tyrosine , receptor tyrosine kinase , grb2 , biochemistry , cancer research , biology
A quantitative proteomics screen to identify substrates of the Src family of tyrosine kinases (SFKs) whose phosphorylation promotes CrkL‐SH2 binding identified the known Crk‐associated substrate (Cas) of Src as well as the orphan receptor endothelial and smooth muscle cell‐derived neuropilin‐like protein (ESDN). Mutagenesis analysis of ESDN's seven intracellular tyrosines in YxxP motifs found several contribute to the binding of ESDN to the SH2 domains of both CrkCT10 regulator of kinase Crk‐Like (CrkL) and a representative SFK Fyn. Quantitative mass spectrometry showed that at least three of these (Y565, Y621 and Y750), as well as non‐YxxP Y715, are reversibly phosphorylated. SFK activity was shown to be sufficient, but not required for the interaction between ESDN and the CrkL‐SH2 domain. Finally, antibody‐mediated ESDN clustering induces ESDN tyrosine phosphorylation and CrkL‐SH2 binding.