Involved in embryonic morphogenesis (PubMed:23103556). Plays a role in the organization of apical filamentous actin in epithelial cells of the developing embryo (PubMed:23103556). May play a role in let-60-mediated vulval development (PubMed:23103556). May induce nuclear condensation (PubMed:23103556). Positively regulates the oxidative stress response, and this may be in association with the small GTPase rab-39 (PubMed:23294242). Not required for muscle integrity (PubMed:23103556). Interacts with rab-39 (GTP-bound form) (PubMed:23294242). Interacts (via SARAH domain) with cst-1; the interaction is required for the phosphorylation of cst-1 (PubMed:23103556). Expressed in the pharynx, epithelial cells, ciliated neurons in the head, body wall muscles, hypodermis, vulva, gonadal sheath cells, tail hypodermis and in coelomocytes. Expressed in the pharynx, neurons and vulva. In embryos, expressed in epidermal cells during the dorsal intercalation and ventral enclosure. RNAi-mediated knockdown results in reduced survival in response to oxidative stress induced by sodium arsenite.