KCNJ12ATP-sensitive inward rectifier potassium channel 12 is a lipid-gated ion channel that in humans is encoded by the KCNJ12 gene.FunctionThis gene encodes an inward-rectifier [potassium channel|inwardly rectifying K+ channel] that may be blocked by divalent cations. This protein is thought to be one of multiple inwardly rectifying channels that contribute to the cardiac inward rectifier current. The gene is located within the Smith–Magenis syndrome region on chromosome 17.InteractionsKCNJ12 has been shown to interact with: APBA1, CASK, DLG1, DLG2, DLG3, DLG4, LIN7A LIN7B, and LIN7C.