sodium–potassium–ATPase

The sodium-potassium pump, also known as sodium-potassium-activated ATPase, is a vital protein found in many cells. Its primary function is to maintain specific concentrations of sodium ([Na⁺]) and potassium ([K⁺]) ions inside and outside the cell.1

This pump actively transports sodium ions out of the cell and potassium ions into the cell, using energy derived from the breakdown of adenosine triphosphate (ATP). This process is crucial for establishing and maintaining the cell's resting potential and action potential, which are fundamental for processes like nerve signaling. The pump is activated by external potassium and internal sodium, and it plays a significant role in cellular metabolism and overall cell function.12