Involved in the tethering and targeting of pkc-3 to modulate the intracellular distribution of the kinase. The complex formed with pkc-3 complexes are likely to be involved in assembly, maintenance, and/or regulation of protein complexes that execute asymmetric and/or polarized cell functions. Interacts with pkc-3. Expressed at the inner surface of the plasma membrane at the cell periphery (which includes a region corresponding to plasma membrane and/or actin cortical cytoskeleton) in early embryos. Tightly associated with organelles and/or cytoskeletal structures with some diffuse expression in the cytoplasm. Differentially routed to lateral junctions between polarized cells. Expressed in cells comprising the intestine, pharyngeal cells, the anal sphincter and depressor muscles. Expressed at each stage of development with predominance of isoform c in early larvae and isoform a in adults. The PID domain (phosphotyrosine interaction domain) of isoform a and isoform c is capable of binding residues 212-224 of pkc-3. Produced by alternative splicing. Produced by alternative initiation at Met-45 of isoform a.