Mitochondrial ATP-Sensitive Potassium Channel (mitoKATP)

The mitochondrial ATP-sensitive potassium channel (mitoKATP) is an ion channel located in the inner mitochondrial membrane. It regulates the influx of potassium ions (K+) into mitochondria in response to intracellular ATP levels, thereby linking cellular energy status to mitochondrial function. It is composed of MITOK (pore-forming) and MITOSUR (regulatory/ATP-binding) subunits. By controlling K+ influx, mitoKATP channels help maintain mitochondrial membrane potential and volume homeostasis, supporting continued oxidative phosphorylation and preventing excessive swelling or depolarization during metabolic stress. Activation of mitoKATP channels has been shown to protect cells—especially cardiac myocytes—against ischemia-reperfusion injury. Pharmacologically targeted by agents such as diazoxide (activator) for cardioprotection.

Activation of mitoKATP channels