obsolete phosphatidylinositol 3-kinase activity (obsolete GO:0035004)
OBSOLETE. Catalysis of the reaction: ATP + a phosphatidylinositol = ADP + a phosphatidylinositol 3-phosphate. This reaction is the addition of a phosphate group to phosphatidylinositol or one of its phosphorylated derivatives at the 3' position of the inositol ring.
phosphoinositide 3-kinase activity
exact