Enables protein N-terminus binding activity and voltage-gated potassium channel activity. Involved in potassium ion transmembrane transport. Located in plasma membrane. Is integral component of plasma membrane. Part of voltage-gated potassium channel complex. 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]