Rac effector required for tissue morphogenesis, cell migrations and egg laying (PubMed:11877381). May play a role in egg laying and in yolk protein clatherin-mediated endocytosis by oocytes during oogenesis (PubMed:19798448). Plays a role in the formation of gap junctions between EA and EP endodermal precursor cells in embryos (PubMed:33238150). Interacts with aco-1, gei-13 and gex-2. Enriched at cell boundaries. Expressed in neurons. Embryonic lethality with cells differentiating, but failing to become organized (PubMed:11877381). External hypodermal cells fail to spread over and enclose the embryo, but instead cluster on the dorsal side (PubMed:11877381). RNAi-mediated knockdown results in reduced egg laying and in defective endocytosis by oocytes characterized by an accumulation of aggregated yolk protein in the pseudocoelomatic space (PubMed:19798448). RNAi-mediated knockdown results in abherrent inx-3-positive gap junction formation along the adjoining membranes of EA and EP endodermal precursor cells at the 16-24 cell stage of embryogenesis (PubMed:33238150). Belongs to the HEM-1/HEM-2 family.