ATPasi

Also known as ATPases, Transmembrane ATPase, Atpase, Proton-translocating atpases, Adenosinetriphosphatase, Adenosine triphosphatase, ATP phosphohydrolase, ATP monophosphatase

200px|thumb|Adenosine triphosphate 200px|thumb|Adenosine diphosphate 200px|thumb|Adenosine monophosphate ATPases (, Adenosine 5'-TriPhosphatase, adenylpyrophosphatase, ATP monophosphatase, triphosphatase, ATP hydrolase, adenosine triphosphatase) are a class of enzymes that catalyze the decomposition of ATP into ADP and a free phosphate ion or the inverse reaction. This dephosphorylation reaction releases energy, which the enzyme (in most cases) harnesses to drive other chemical reactions that would not otherwise occur. This process is widely used in all known forms of life.