Enables acetylcholine binding activity. Contributes to heterocyclic compound binding activity. Predicted to be involved in several processes, including cholinergic synaptic transmission; regulation of synaptic vesicle exocytosis; and response to nicotine. Located in membrane and neuron projection. Part of acetylcholine-gated channel complex. Orthologous to human CHRNB3 (cholinergic receptor nicotinic beta 3 subunit). [provided by Alliance of Genome Resources, Apr 2022]