Organism | UniProt | Comment | Textmining |
---|---|---|---|
Rattus norvegicus | - |
- |
- |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
FRTL-5 cell | ATCC CRL8305 | Rattus norvegicus | - |
General Information | Comment | Organism |
---|---|---|
physiological function | insulin-like growth factor-I stimulation leads to prolonged association of phosphatidylinositol 3-kinase with insulin-like growth factor-I receptor. Phosphatidylinositol 3-kinase activity is present in this complex in thyrocytes and fibroblasts. Insulin-like growth factor-I withdrawal in mid-G1 phase impairs the association of phosphatidylinositol 3-kinase with insulin-like growth factor-I receptor and suppresses DNA synthesis the same as when phosphatidylinositol 3-kinase inhibitor is added. Residues Tyr1316-X-X-Met of insulin-like growth factor-I receptor function as a phosphatidylinositol 3-kinase binding sequence when this tyrosine is phosphorylated. In cells expressing exogenous mutant insulin-like growth factor-I receptor in which Tyr1316 is substituted with Phe, insulin-like growth factor-I stimulation induces tyrosine phosphorylation of insulin-like growth factor-I receptor and insulin receptor substrates-1/2, but mutated insulin-like growth factor-IR fails to bind phosphatidylinositol 3-kinase and to induce maximal phosphorylation of GSK3 and cell proliferation in response to insulin-like growth factor-I. Phosphatidylinositol 3-kinase activity bound to insulin-like growth factor-I receptor, which is continuously sustained by insulin-like growth factor-I stimulation, is required for insulin-like growth factor-I-induced cell proliferation | Rattus norvegicus |