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The sodium–potassium pump (sodium–potassium adenosine triphosphatase, also known as Na + /K +-ATPase, Na + /K + pump, or sodium–potassium ATPase) is an enzyme (an electrogenic transmembrane ATPase) found in the membrane of all animal cells. It performs several functions in cell physiology. The Na + /K +-ATPase enzyme is active (i.e. it ...
The pore domain also features lateral tunnels or fenestrations that run perpendicular to the pore axis. These fenestrations that connect the central cavity to the membrane are proposed to be important for drug accessibility. [6] [7] [8] In mammalian sodium channels, the region linking domains III and IV is also important for channel function.
11928 Ensembl ENSG00000163399 ENSMUSG00000033161 UniProt P05023 Q5TC02 Q8VDN2 RefSeq (mRNA) NM_000701 NM_001001586 NM_001160233 NM_001160234 NM_144900 RefSeq (protein) NP_000692 NP_001153705 NP_001153706 NP_659149 Location (UCSC) Chr 1: 116.37 – 116.41 Mb Chr 3: 101.48 – 101.51 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Protein domain Gastric H + /K + -ATPase, N terminal ...
All cells in animal body tissues are electrically polarized – in other words, they maintain a voltage difference across the cell's plasma membrane, known as the membrane potential. This electrical polarization results from a complex interplay between protein structures embedded in the membrane called ion pumps and ion channels.
English: Example of primary active transport, where energy from hydrolysis of ATP is directly coupled to the movement of a specific substance across a membrane independent of any other species. Image renamed from Image:Sodium-Potassium_pump.svg
The Na + /K +-ATPase, as well as effects of diffusion of the involved ions, are major mechanisms to maintain the resting potential across the membranes of animal cells.. The relatively static membrane potential of quiescent cells is called the resting membrane potential (or resting voltage), as opposed to the specific dynamic electrochemical phenomena called action potential and graded ...
A pump is a protein that hydrolyses ATP to transport a particular solute through a membrane, and in doing so, generating an electrochemical gradient membrane potential. This gradient is of interest as an indicator of the state of the cell through parameters such as the Nernst potential .
The sodium–potassium pump is a critical enzyme for regulating sodium and potassium levels in cells. Potassium is the main intracellular ion for all types of cells, while having a major role in maintenance of fluid and electrolyte balance. [1] [2] Potassium is necessary for the function of all living cells and is thus present in all plant and ...