Na+K+-ATPase

Na+K+-ATPase
Na+,K+-ATP·ase (a-te-peґās) an enzyme that spans the plasma membrane and hydrolyzes ATP to maintain the gradients of sodium (Na+) and potassium (K+) across the cell membrane; for each ATP hydrolyzed, three sodium ions are extruded from the cell and two potassium ions are brought in. The gradients are necessary for protein biosynthesis, maintenance of osmotic equilibrium, propagation of nerve impulses, and secondary transport of some molecules (e.g., glucose) across cell membranes. See also adenosinetriphosphatase. Called also Na+-K+, sodium, or sodium-potassium pump. In EC nomenclature, called Na+/K+-exchanging ATPase.

Medical dictionary. 2011.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • ATPase — Drei Beispiele für ATPasen. Oben eine membranständige ATPase, die Protonenpumpe HslUV, bestehend aus 6 Untereinheiten, die …   Deutsch Wikipedia

  • ATPase — ATPase, die; , n: Abk. für ↑ Adenosintriphosphatase. * * * ATPase   [atepe aːzə] die, / n, Abkürzung für Adenosintriphosphatase, Physiologie: ATPasen sind …   Universal-Lexikon

  • ATPase — Représentation de l ATPase AHA2 (pompe à protons) d Arabidopsis thaliana. Les ATPases membranaires sont une classe d enzymes liées au métabolisme énergétique, qui hydrolysent ou synthétisent les molécules d adénosine triphosphate (ATP) tout en… …   Wikipédia en Français

  • ATPase — ATPases are a class of enzymes that catalyze the decomposition of adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion. This dephosphorylation reaction releases energy, which the enzyme (in most cases) harnesses… …   Wikipedia

  • ATPase — Abbreviation for adenosine triphosphatase. * * * adenosine triphosphatase * * * ATPase .ā .tē pē .ās, .āz n an enzyme that hydrolyzes ATP esp one that hydrolyzes ATP to ADP and inorganic phosphate called also adenosine triphosphatase * * *… …   Medical dictionary

  • V-ATPase — ATPase Drei Beispiele für ATPasen. Oben eine membranständige ATPase, die Protonenpumpe HslUV, bestehend aus 6 Untereinheiten, die …   Deutsch Wikipedia

  • ATPase — noun Date: 1946 an enzyme that hydrolyzes ATP; especially one that hydrolyzes ATP to ADP and inorganic phosphate …   New Collegiate Dictionary

  • ATPase — An enzyme capable of releasing the terminal (g) phosphate from ATP, yielding ADP and inorganic phosphate. The description could mislead, because in most cases the enzymic activity is not a straightforward hydrolysis, but is part of a coupled… …   Dictionary of molecular biology

  • ATPase — /ay tee pee ays, ayz/, n. Biochem. adenosine triphosphatase: any of several enzymes that catalyze the hydrolysis of ATP to ADP and phosphate. [1945 50; ATP + ASE] * * * …   Universalium

  • ATPase — noun /eɪtiːˈpiːeɪz/ A type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity …   Wiktionary

  • ATPase — Adenosine triphosphatase (Adenosin trifosfatasa) …   Diccionario de siglas médicas y otras abreviaturas

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”