After binding acetylcholine, the AChR responds by an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane (By similarity). A subunit of the levamisole-insensitive nicotinic receptor. The cam-1 protein is required for correct localization. Expressed in the body wall muscle. Uncoordinated movement and reduced body wall muscle currents. These phenotypes are probably related. Belongs to the ligand-gated ion channel (TC 1.A.9) family. Acetylcholine receptor (TC 1.A.9.1) subfamily.