Enables PDZ domain binding activity. Predicted to be involved in several processes, including maintenance of epithelial cell apical/basal polarity; morphogenesis of an epithelial sheet; and protein localization to basolateral plasma membrane. Located in cell-cell junction. Is active in glutamatergic synapse. Orthologous to human LIN7C (lin-7 homolog C, crumbs cell polarity complex component). [provided by Alliance of Genome Resources, Apr 2022]