May mediate the control of various cellular processes by insulin. When phosphorylated by the insulin receptor binds specifically to various cellular proteins containing SH2 domains such as phosphatidylinositol 3-kinase p85 subunit or GRB2 Activates phosphatidylinositol 3-kinase when bound to the regulatory p85 subunit (By similarity)
Tissue Specificity
A synthetic peptide corresponding to residues near the C-terminus of human IRS-1was used as immunogen.