Phosphatidylinositol 3-kinase (PIK3) is a signaling protein that phosphorylates the inositol ring of phosphatidylinositol at the 3-prime position. Signaling is initiated when upstream tyrosine kinase receptors or G protein coupled receptors are bound by their ligands. It binds to activated (phosphorylated) protein-Tyr kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Phosphatidylinositol 3-kinase plays an important role in the metabolic actions of insulin, and a mutation in this gene has been associated with insulin resistance. During insulin stimulation, it also binds to IRS-1. Mutations in the gene can result in Agammaglobulinemia 7, SHORT syndrome, or Immunodeficiency 36.
p55PIK; phosphatidylinositol 3 kinase, regulatory subunit, polypeptide 3 (p55); Phosphatidylinositol 3-kinase 55 kDa regulatory subunit gamma; Phosphatidylinositol 3-kinase 85 kDa regulatory subunit alpha; Phosphatidylinositol 3-kinase 85 kDa regulatory subunit beta; Phosphatidylinositol 3-kinase 85 kDa regulatory subunit gamma; phosphatidylinositol 3-kinase p55 subunit; phosphatidylinositol 3-kinase regulartory subunit polypeptide 2; Phosphatidylinositol 3-kinase regulatory subunit alpha; Phosphatidylinositol 3-kinase regulatory subunit beta; Phosphatidylinositol 3-kinase regulatory subunit gamma; phosphatidylinositol 3-kinase, regulartory subunit, polypeptide 2; phosphatidylinositol 3-kinase, regulatory subunit, polypeptide 1 (p85 alpha); phosphatidylinositol 3-kinase, regulatory subunit, polypeptide 2 (p85 beta); phosphatidylinositol 3-kinase, regulatory subunit, polypeptide 3 (p55, gamma); phosphatidylinositol 3-kinase-associated p-85 alpha; Phosphoinositide 3-kinase p85 (other splicing variants: p55 and p50); Phosphoinositide 3-kinase, regulatory subunit, polypeptide 1 (p85 alpha); phosphoinositide-3-kinase regulatory subunit; phosphoinositide-3-kinase regulatory subunit alpha; phosphoinositide-3-kinase regulatory subunit beta; phosphoinositide-3-kinase, regulatory subunit 1 (alpha); phosphoinositide-3-kinase, regulatory subunit 1 (p85 alpha); phosphoinositide-3-kinase, regulatory subunit 2 (beta); phosphoinositide-3-kinase, regulatory subunit 2 (p85 beta); phosphoinositide-3-kinase, regulatory subunit 3 (gamma); phosphoinositide-3-kinase, regulatory subunit 3 (p55, gamma); phosphoinositide-3-kinase, regulatory subunit, polypeptide 1 (p85 alpha); phosphoinositide-3-kinase, regulatory subunit, polypeptide 2 (p85 beta); phosphoinositide-3-kinase, regulatory subunit, polypeptide 3 (p55, gamma); PI3-kinase p85 subunit alpha; PI3-kinase p85 subunit beta; PI3-kinase p85 subunit gamma; PI3-kinase regulatory subunit alpha; PI3-kinase regulatory subunit beta; PI3-kinase regulatory subunit gamma; PI3-kinase subunit p55-gamma; PI3-kinase subunit p85-alpha; PI3-kinase subunit p85-beta; PI3-kinase subunit p85-gamma; PI3K regulatory subunit alpha; PI3K regulatory subunit beta; PI3K regulatory subunit gamma; ptdIns-3-kinase p85-alpha; ptdIns-3-kinase p85-beta; ptdIns-3-kinase p85-gamma; ptdIns-3-kinase regulatory subunit alpha; ptdIns-3-kinase regulatory subunit beta; ptdIns-3-kinase regulatory subunit gamma; ptdIns-3-kinase regulatory subunit p55-gamma; ptdIns-3-kinase regulatory subunit p85-alpha; ptdIns-3-kinase regulatory subunit p85-beta; ptdIns-3-kinase regulatory subunit p85-gamma
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