Enables ATP binding activity; inorganic cation transmembrane transporter activity; and sulfonylurea receptor binding activity. Involved in kidney development and potassium ion import across plasma membrane. Located in intracellular membrane-bounded organelle and sarcolemma. Part of inward rectifying potassium channel. Colocalizes with mitochondrion. Used to study hypertension. Biomarker of Parkinsonism and sciatic neuropathy. Orthologous to human KCNJ8 (potassium inwardly rectifying channel subfamily J member 8). [provided by Alliance of Genome Resources, Apr 2022]