Abstract
In a number of cell lines responsive to basic fibroblast growth factor (bFGF), two major tyrosine phosphorylated proteins, of molecular weights around 120kDa and 90kDa, are precipitated along with the tyrosine phosphatase SHP2 from the lysates of stimulated cells. The docker protein Gab-1 represents at least part of the 120kDa protein(s). The p90 protein was identified as the SNT protein. The two SH2 domains of SHP2 bind directly and synergistically to tyrosine phosphorylated SNT. Tyrosine phosphorylated SNT does not bind SHP1 and does not appear to be an in vivo substrate of SHP2 but is likely to function as an adapter protein in FGF-signalling.
MeSH terms
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3T3 Cells
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Animals
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Cells, Cultured
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Epithelial Cells
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Fibroblast Growth Factor 2 / pharmacology*
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Humans
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Intracellular Signaling Peptides and Proteins
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Kidney / cytology
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Mice
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Nerve Growth Factors
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Nerve Tissue Proteins / metabolism*
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PC12 Cells
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Phosphorylation
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Protein Binding
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Protein Tyrosine Phosphatase, Non-Receptor Type 11
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Protein Tyrosine Phosphatase, Non-Receptor Type 6
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Protein Tyrosine Phosphatases / metabolism*
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Rats
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SH2 Domain-Containing Protein Tyrosine Phosphatases
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Substrate Specificity
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Tyrosine / metabolism*
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src Homology Domains*
Substances
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Intracellular Signaling Peptides and Proteins
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Nerve Growth Factors
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Nerve Tissue Proteins
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Fibroblast Growth Factor 2
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Tyrosine
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PTPN11 protein, human
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PTPN6 protein, human
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Protein Tyrosine Phosphatase, Non-Receptor Type 11
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Protein Tyrosine Phosphatase, Non-Receptor Type 6
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Protein Tyrosine Phosphatases
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Ptpn11 protein, mouse
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Ptpn11 protein, rat
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Ptpn6 protein, mouse
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Ptpn6 protein, rat
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SH2 Domain-Containing Protein Tyrosine Phosphatases