Predicted to enable extracellular ligand-gated monoatomic ion channel activity and transmembrane signaling receptor activity. Predicted to be involved in monoatomic ion transmembrane transport. Predicted to be located in membrane. Is an ortholog of C. elegans unc-63. In C. elegans, unc-63 is involved in several processes, including calcium ion import across plasma membrane; cholinergic synaptic transmission; and regulation of multicellular organismal process.