該基因編碼胰島素受體底物2，這是一種胞質信號分子，通過充當不同受體酪氨酸激酶和下游效應器之間的分子接頭來調節胰島素、胰島素樣生長因子1和其他細胞因子的作用。這種基因的產物在受體刺激時被胰島素受體酪氨酸激酶磷酸化，在IL4治療后被白細胞介素4受體相關激酶磷酸化。
This gene encodes the insulin receptor substrate 2, a cytoplasmic signaling molecule that mediates effects of insulin, insulin-like growth factor 1, and other cytokines by acting as a molecular adaptor between diverse receptor tyrosine kinases and downstream effectors. The product of this gene is phosphorylated by the insulin receptor tyrosine kinase upon receptor stimulation, as well as by an interleukin 4 receptor-associated kinase in response to IL4 treatment.