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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Identification of SNT/FRS2 docking site on RET receptor tyrosine kinase and its role for signal transduction.

SNT/FRS2 is a lipid anchored docking protein that contains an amino-terminal myristylation signal, followed by a phosphotyrosine-binding (PTB) domain and a carboxy-terminal region with multiple tyrosine residues. Here we show that the SNT/FRS2 PTB domain binds to RET receptor tyrosine kinase activated by glial cell line-derived neurotrophic factor (GDNF) or multiple endocrine neoplasia (MEN) 2 mutations. Analyses by site directed-mutagenesis revealed that it binds to tyrosine 1062 in RET that is also known to be a binding site for the SHC adaptor protein. Whereas SHC bound to RET was associated with GRB2 and GAB1 proteins, SNT/FRS2 was associated with GRB2 only, suggesting that SNT/FRS2 is involved mainly in the activation of the RAS/ mitogen activated protein kinase ( MAPK) pathway but not the phosphatidylinositol 3-kinase (PI3-K)/AKT pathway. In addition, phosphorylated SNT/FRS2 appeared to directly complex with SHP-2 tyrosine phosphatase. These results suggest that tyrosine 1062 in RET provides a site for the interaction of multiple signaling molecules and that the balance of SHC and SNT/FRS2 binding may affect the nature of the intracellular signaling for cell proliferation, differentiation and survival induced by activated RET.[1]


  1. Identification of SNT/FRS2 docking site on RET receptor tyrosine kinase and its role for signal transduction. Kurokawa, K., Iwashita, T., Murakami, H., Hayashi, H., Kawai, K., Takahashi, M. Oncogene (2001) [Pubmed]
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