Phosphatidylinositol 3-kinase (PI3K) is a lipid kinase that phosphorylates phosphatidylinositol and similar compounds, creating second messengers important in growth signaling pathways. PI3K functions as a heterodimer of a regulatory and a catalytic subunit. The protein encoded by PIK3R2(phosphoinositide-3-kinase regulatory subunit 2) is a regulatory component of PI3K. Two transcript variants, one protein coding and the other non-protein coding, have been found for PIK3R2.基因ID为:5296;蛋白质ID:O00459