Involved in the migration of sex myoblasts (progenitors of egg-laying muscles), Q neuroblasts and BDU interneurons during development (PubMed:9073451, PubMed:12783787, PubMed:22293500). Involved in axon branching and guidance of neurons including GABAergic type D motor neurons (PubMed:12783787). Promotes sex myoblast migration and positioning independently of gonad attraction cues (PubMed:9073451, PubMed:12783787). May act downstream of mig-13 in order to promote the guidance, migration and positioning of Q neuroblasts and their descendants along the anteroposterior body axis (PubMed:22293500). Required for coordinated movements (PubMed:12783787). Expressed throughout development (PubMed:8970152, PubMed:12783787, PubMed:22293500). First expressed in several posterior cells of comma stage embryos (PubMed:12783787). Expressed in the excretory cell and in some head neurons in threefold stage embryos (PubMed:12783787). At the L1 stage of larval development expressed in the syncytial hypodermis (PubMed:8970152). From the L1 stage of larval development to adulthood, expressed in head neurons, the excretory cell, excretory gland cells and in the sphincter muscle (PubMed:12783787, PubMed:22293500). From the L4 stage of larval development to adulthood, expressed in hypodermal cells surrounding the vulva (PubMed:12783787). Defective sex myoblast migration (PubMed:9073451). Motor neuron axon guidance defects with aberrant axon branching in type D motor neurons (PubMed:12783787). Contains a metallopeptidase domain, but the active site is not conserved, so the protein is not expected to have protease activity.