GO:0035031 | Definition | A complex containing a heterodimer of a catalytic Class IB phosphoinositide 3-kinase (PI3K) subunit bound to a regulatory (adaptor) subunit. Class I PI3Ks phosphorylate phosphatidylinositol [PI], phosphatidylinositol-4-phosphate [PI(4)P] and phosphatidylinositol-4,5-bisphosphate [PI(4,5)P2] and are divided into subclasses A and B according to the type of adaptor subunit with which they associate. Class IB PI3Ks are stimulated by G-proteins and do not interact with the SH2-domain containing adaptors that bind to Class IA PI3Ks. |