Predicted to enable PDZ domain binding activity and inward rectifier potassium channel activity. Predicted to be involved in potassium ion import across plasma membrane and regulation of ion transmembrane transport. Predicted to act upstream of or within potassium ion transport. Located in parallel fiber to Purkinje cell synapse. Is integral component of presynaptic membrane. Is expressed in central nervous system; eye; intestine; and male reproductive gland or organ. Orthologous to human KCNJ9 (potassium inwardly rectifying channel subfamily J member 9). [provided by Alliance of Genome Resources, Apr 2022]