EC 3.6.1

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.

group of proteins having inorganic pyrophosphatase activity

Pyrophosphatases, also known as diphosphatases, are acid anhydride hydrolases that act upon diphosphate bonds.

InterPro Family

class of enzymes

Apyrase (, ATP-diphosphatase, adenosine diphosphatase, ADPase, ATP diphosphohydrolase) is a calcium-activated plasma membrane-bound enzyme (magnesium can also activate it) () that catalyses the hydrolysis of ATP to yield AMP and inorganic phosphate. Two isoenzymes are found in commercial preparations from S. tuberosum. One with a higher ratio of substrate selectivity for ATP:ADP (approx 10) and another with no selectivity (ratio 1).

In enzymology, a nucleoside-diphosphatase () is an enzyme that catalyzes the chemical reaction

Thiamine-triphosphatase is an enzyme involved in thiamine metabolism. It catalyzes the chemical reaction

In enzymology, a nucleoside-triphosphatase (NTPase) () is an enzyme that catalyzes the chemical reaction

protein-coding gene in the species Homo sapiens