Enables acetylcholine-gated cation-selective channel activity. Involved in cation transport and skeletal muscle contraction. Part of acetylcholine-gated channel complex. Human ortholog(s) of this gene implicated in congenital myasthenic syndrome 2A and congenital myasthenic syndrome 2C. Orthologous to human CHRNB1 (cholinergic receptor nicotinic beta 1 subunit). [provided by Alliance of Genome Resources, Apr 2022]