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Dictionary » A » ATPase

ATPase

Definition

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.


Supplement

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


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a couple of review questions

... - because it is diluted in the enviroment? - substrate-based phosphorylation (look at glycolysis) and ATPase http://www.lmgtfy.com/?q=electron+transport (basically should be enough to look at the pictures, but it is mentioned EVERYWHERE, why FAD produces ...

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by JackBean
Sat Nov 07, 2009 1:06 am
 
Forum: Microbiology
Topic: a couple of review questions
Replies: 1
Views: 73

Re: Types of phosphorylation ?

They definityvelly don't go by 2, they are always one by one (althrough they do not pass directly, instead thez do a round with the ATPase stationary part and then go out) http://en.wikipedia.org/wiki/Photophosphorylation Photop. takes place in chloroplasts during photosynthesis, ...

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by JackBean
Fri Oct 09, 2009 7:04 am
 
Forum: Cell Biology
Topic: Types of phosphorylation ?
Replies: 4
Views: 155

membrane permeability

If the plasma membrane was permeable to the same degree to both Na+ and K+, then they would not have to use the ATPase. And since the concentration gradient of both ions are of the same magnitude, then I would expect the ions to move across the membrane at pretty much the same ...

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by kolean
Wed Jul 22, 2009 2:33 am
 
Forum: Molecular Biology
Topic: membrane permeability
Replies: 2
Views: 755

cellular respiration???

... in the ETS to their ground state where oxygen is there to accept them to form water. Energy released by electrons is used by the giant protein ATPase to form the energy currency ATP. A total of 36 or 38 moles of ATP are produced per mole of glucose in aerobic respiration. It was a simple a ...

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by freshbiology
Fri Jul 17, 2009 5:39 pm
 
Forum: General Discussion
Topic: cellular respiration???
Replies: 1
Views: 713

membrane permeability

... permeable to the same degree to both Na+ and K+ the two ions could not move across the membane at the same rate! In the second step of Na+/K+ ATPase 3 Na+ ions move out of the cell into the extracellular space reducing an ATP molecule to ADP. In turn, in the 4th step of the NA+/K+ ATPase, ...

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by NewtoBiology
Wed Jul 15, 2009 11:40 pm
 
Forum: Molecular Biology
Topic: membrane permeability
Replies: 2
Views: 755
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