Enables calmodulin binding activity and voltage-gated ion channel activity. Acts upstream of or within membrane hyperpolarization and transmission of nerve impulse. Located in cell surface; main axon; and plasma membrane. Part of voltage-gated potassium channel complex. Is expressed in several structures, including brain; gut; immune system; reproductive system; and white fat. Used to study benign neonatal seizures and developmental and epileptic encephalopathy 7. Human ortholog(s) of this gene implicated in benign neonatal seizures and developmental and epileptic encephalopathy 7. Orthologous to human KCNQ2 (potassium voltage-gated channel subfamily Q member 2). [provided by Alliance of Genome Resources, Apr 2022]