Involved in the asymmetric cell division of the embryo downstream of par-2 and par-3 by regulating the asymmetric cortical distribution of pkk-1; a phosphatidylinositol 4;5- bisphosphate-producing enzyme; which in turn regulates the asymmetrical distribution of grp-1; grp-2 and lin-5. {ECO:0000269|PubMed:18694560}.