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Keyword - Potassium channel (KW-0631)

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Protein which is part of a transmembrane protein complex that forms a hydrophilic channel across the lipid bilayer through which potassium ions can diffuse down their electrochemical gradient. The channels are gated and only open in response to a specific stimulus, such as a change in membrane potential (voltage-gated). They are important for the regulation of the resting membrane potential and for the control of the shape and frequency of action potentials.


Molecular function


potassium channel activity [ GO:0005267 ]
potassium ion transmembrane transport [ GO:0071805 ]


Ion transportPotassiumPotassium channelIon channelMolecular functionLigandPotassium transportTransportBiological process