Structural component of gap junctions (PubMed:27015090, PubMed:33238150). Plays a role in maintaining gap junction activity to promote locomotion (PubMed:33238150). Heterooligomer of unc-7 and unc-9. Interacts with F-actin (PubMed:33238150). Co-localizes with unc-1 at the gap junctions formed between PLM and other neurons. Expressed in PLM neurons (at protein level). Expressed in the nerve ring (PubMed:33238150). Belongs to the pannexin family.