potassium channel


potassium channel
A small pore in a cell membrane that is selective to potassium ions and has several regulatory functions.

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  • Potassium channel — Top view of potassium ions (purple) moving through potassium channel (PDB 1BL8) In the field of cell biology, potassium channels are the most widely distributed type of ion channel and are found in virtually all living organisms …   Wikipedia

  • potassium channel — Ion channel selective for potassium ions. There are diverse types with different functions, for example: delayed rectifier channels, M channels, A channels, inward rectifier channels, Ca dependent K+ channels …   Dictionary of molecular biology

  • potassium channel — a voltage gated channel selective for the passage of potassium ions, occurring in a wide variety of cells, including nerve, muscle, and secretory cells; its functions include regulation of cell membrane excitability, regulation of repetitive low… …   Medical dictionary

  • Potassium channel blocker — Potassium channel blockers are agents which interfere with conduction through potassium channels.ArrhythmiaPotassium channel blockers used in the treatment of cardiac arrhythmia are classified as class III antiarrhythmic agents.MechanismClass III …   Wikipedia

  • potassium channel blocker — potassium channel blocking agent …   Medical dictionary

  • Potassium channel tetramerisation domain — Pfam box Symbol = K tetra Name = K+ channel tetramerisation domain width = caption = Pfam= PF02214 InterPro= IPR003131 SMART= Prosite = SCOP = 1t1d TCDB = OPM family= 8 OPM protein= 2a79 PDB=PDB3|3kvtS:12 102 PDB3|1nn7A:43 132 PDB3|1s1gB:42… …   Wikipedia

  • Potassium channel RNA editing signal — The potassium channel RNA editing signal is an RNA element found in human Kv1.1 and its homologues which directs the efficient modification of an adenosine to inosine by an adenosine deaminase acting on RNA (ADAR). The ADAR modification causes an …   Wikipedia

  • potassium-channel activator — any one of a new class of drugs that enhance the movement of potassium ions through the protein channels in cell membranes. In the case of smooth muscle cells, such as those in the walls of arteries, their sensitivity to the normal stimuli to… …   Medical dictionary

  • potassium-channel activator — any one of a class of drugs that enhance the movement of potassium ions through the protein channels in cell membranes. In the case of smooth muscle cells, such as those in the walls of arteries, their sensitivity to the normal stimuli to… …   The new mediacal dictionary

  • potassium channel blocking agent — any of a class of antiarrhythmic agents that inhibit the movement of potassium ions through the potassium channels, thus prolonging repolarization of the cell membrane …   Medical dictionary


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