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 (ā′tē-pē′ās, -āz)
An enzyme that catalyzes the formation of ATP from ADP, inorganic phosphate, and energy, found in mitochondria and chloroplasts; adenosine triphosphatase. Also called ATP synthase.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Biochemistry) adenosine triphosphatase; an enzyme that converts ATP to ADP
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈeɪˈtiˈpi eɪs, -eɪz)

adenosine triphosphatase: any of several enzymes that catalyze the hydrolysis of ATP to ADP and phosphate.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The researchers observed three principal modes of coordinated hydrolysis, featuring hydrolytic events in two oppositely positioned ATPases, in two adjacent ATPases, and in one ATPase at a time.
The role of cation activated ATPase in transmitter release from the rat iris.
[6] These two cations are in balance with each other, because of Na+ - K+ - ATPase pump, which in turn maintains permeability of lens membrane.
Several researchers reported that in IDA, the activity of red cell membrane-bound [Na.sup.+][K.sup.+]ATPase is altered and due to this altered ATPase activity, serum sodium, and potassium levels are affected.
Figure 2(a) shows that the [Na.sup.+]/[K.sup.+]-ATPase activity in the control increased for 12 h, whereas ATPase activity increased from 0 to 8 h and then decreased from 8 to 12 h before increasing again from 12 to 24 h when treated with BPCE.
Androgens have been suggested to increase the expression of the Na-K ATPase and explain the male to female prevalence to have been reported to be from 20 to 44: 1 [5,9], although the prevalence of hyperthyroidism of male to female is 1: 10.
The activation of [Na.sup.+]-[K.sup.+] ATPase leads to a shift of potassium ions intracellularly, resulting in hypokalaemia and hyperpolarisation of muscle cell membranes [1].
Myosin globular head is responsible for the ATPase activity [16].
ATP1AL1 gene is transcriptionally competent and probably encodes the related ion transport ATPase," FEBS Letters, vol.

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