Required for the localization of daf-6 to the socket glial channel and the sheath lumen (PubMed:34115759). In association with daf-6, plays a role in dendrite extension and ciliogenesis to ensure the formation of glial channels in amphid and phasmid ciliated sensory neurons (PubMed:34115759). Interacts with daf-6. Secreted into the sensory compartment region in both amphids and phasmids. Expressed in sheath and socket glial cells in both the amphid and phasmid ciliated sensory neurons (at protein level). Expressed in early developing glial cells of the embryo and accumulates between the embryo and the eggshell.