May be involved in trafficking or stabilization of the vesicular acetylcholine transporter unc-17. Expressed in a subset of neurons and in body wall muscles. In the nervous system, expressed specifically in cholinergic motor neurons of the ventral nerve cord, a subset of cholinergic head neurons, anterior sublateral neurons, and body sublateral neurons (at protein level). First detected in the embryo and persists throughout development (at protein level). Mild decrease in swimming behavior but otherwise no apparent phenotype.