Inactivation of two Dictyostelium discoideum genes, DdPIK1 and DdPIK2, encoding proteins related to mammalian phosphatidylinositide 3-kinases, results in defects in endocytosis, lysosome to postlysosome transport, and actin cytoskeleton organization.
Buczynski G, Grove B, Nomura A, Kleve M, Bush J, Firtel RA, Cardelli J. J Cell Biol. 1997 Mar 24; 136(6):1271-86.