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noun, plural: ATPases

An enzyme that catalyzes the hydrolysis or decomposition of ATP into ADP and a free phosphate ion, thereby releasing energy for use in another biochemical reaction.


Examples of ATPases are transmembrane ATPases that move solutes across the membrane, especially against their concentration gradient and V-ATPases that are primarily found in eukaryotic vacuoles, catalysing ATP hydrolysis to transport solutes and lower pH in organelles.

See also: ATP synthase