The JNK-interacting protein (JIP) group of scaffold proteins selectively mediates JNK signaling by aggregating specific components of the MAPK cascade to form a functional JNK signaling module. May function as a regulator of synaptic vesicle transport, through interactions with the JNK-signaling components and motor proteins. Binds specific components of the JNK signaling pathway namely jnk-1, jkk-1 and sek-1. Associates with components of the motor protein, kinesin-1. Pre-assembled unc-16 scaffolding complexes are then transported as a cargo of kinesin, to the required subcellular location. Regulates the retrograde transport of autophagosomes from the neurites to the cell body of AIY interneurons (PubMed:30880001). Diffusely localized throughout cell body but intensely localized in regions adjacent to nucleus and at presumptive tips of neural processes. Expressed in neurons of the ventral cord, retrovesicular and preanal ganglia and nerve ring, intestinal cells, seam and hypodermal cells, body wall, head muscle and pharynx. Belongs to the JIP scaffold family.