The function of ATP1A2 (ATPase Na+/K+ transporting subunit alpha 2, ENSG00000018625) is as follows. Catalytic subunit of the Na(+)/K(+)-ATPase that hydrolyzes ATP to exchange ions across the plasma membrane, exporting 3 Na(+) and importing 2 K(+) per cycle (PubMed:33880529). It undergoes ATP-driven conformational changes that allow alternating binding and release of Na(+) and K(+) ions across the membrane (By similarity). This process maintains essential Na(+) and K(+) gradients for membrane potential and cellular function (PubMed:33880529). {ECO:0000250|UniProtKB:P05023, ECO:0000269|PubMed:33880529}.