Predicted to enable delayed rectifier potassium channel activity and potassium channel regulator activity. Involved in potassium ion transport and regulation of delayed rectifier potassium channel activity. Located in perinuclear region of cytoplasm and plasma membrane. Part of voltage-gated potassium channel complex. Orthologous to human KCNS1 (potassium voltage-gated channel modifier subfamily S member 1). [provided by Alliance of Genome Resources, Apr 2022]