Predicted to enable protein-macromolecule adaptor activity. Predicted to be involved in neurotransmitter secretion; regulation of synaptic assembly at neuromuscular junction; and synaptic vesicle transport. Predicted to be located in bicellular tight junction and plasma membrane. Predicted to be part of MPP7-DLG1-LIN7 complex. Predicted to be active in basolateral plasma membrane; cell-cell junction; and synapse. Is expressed in myotome and nervous system. Orthologous to human LIN7A (lin-7 homolog A, crumbs cell polarity complex component).