Enables inward rectifier potassium channel activity and scaffold protein binding activity. Involved in central nervous system development; potassium ion transport; and regulation of membrane potential. Is integral component of plasma membrane. Human ortholog(s) of this gene implicated in long QT syndrome; long QT syndrome 2; and short QT syndrome. Orthologous to human KCNH2 (potassium voltage-gated channel subfamily H member 2). [provided by Alliance of Genome Resources, Apr 2022]