calcium pump


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Related to calcium pump: plasma membrane calcium pump

calcium pump

[¦cal·se·əm ‚pəmp]
(cell and molecular biology)
An enzyme that uses the energy generated by the hydrolysis of adenosine triphosphate (ATP) to move calcium ions out of the cytoplasm or, in the case of muscle cells, from the cytoplasm to the sarcoplasmic reticulum. Also known as Ca2+ATPase.
References in periodicals archive ?
However, when they blocked glycolysis, they saw a reduced supply of ATP which inhibited the calcium pump, resulting in a toxic calcium overload and ultimately cell death.
Another prediction is that if spawn time is regulated by reaching a low threshold value of calcium and achieved by endoplasmic reticulum calcium pumps acting in darkness, a shift in spawn time would result from either changing the rate at which calcium is sequestered or changing the sensitivity of a cytoplasmic process to calcium levels.
'It turns out that the calcium pump can accurately measure the cell's calcium content and adjust its speed in accordance with this information.
Electron microscopy reveals loss of desmosomes (epithelial intercellular junctions formed by membrane and submembrane protein complexes), breakdown of desmosome-keratin intermediate filament attachment, and perinuclear aggregates of keratin intermediate filaments.7,8 The mechanism by which decreased activity of the SERCA2 calcium pump leads to these changes is still under investigation.
In the presence of calbindin D, there is an increase in transmembrane calcium pump activity within the membranes of the intestine and the distal tubule of the nephron.
Abnormal red-cell calcium pump in patients with idiopathic hypercalciuria.
Leading researchers from Aarhus University and the University of Copenhagen have now provided new information of how the calcium pump regulates the amount of calcium in the cells.
CALCIUM PUMP PROTEINS--Proteins on the sarcoplasmic reticulum that remove calcium from the cell cytosol after a contraction.
This review mainly focuses on the structure, function of the sarco(endo)plasmic reticulum calcium pump (SERCA) and its role in genesis of arrhythmias.

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