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Catalysis of the energy-independent passage of cations across a lipid bilayer down a concentration gradient. Catalysis of the transmembrane transfer of a potassium ion by a voltage-gated channel. Catalysis of the transfer of metal ions from one side of a membrane to the other. Catalysis of the chloride concentration-regulatable energy-independent passage of potassium ions across a lipid bilayer down a concentration gradient. Catalysis of facilitated diffusion of a potassium ion (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism. Catalysis of the transmembrane transfer of potassium by a channel that opens in response to stimulus by a sodium ion or ions. Transport by a channel involves catalysis of facilitated diffusion of a solute (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel, without evidence for a carrier-mediated mechanism. Sodium activated potassium channels have distinctive properties, including a large single channel conductance, subconductance states, and a block of single channel currents at positive potentials, similar to inward rectification. Catalysis of the calcium concentration-regulatable energy-independent passage of potassium ions across a lipid bilayer down a concentration gradient. Catalysis of facilitated diffusion of an ion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: potassium channel activity
Acc: GO:0005267
Aspect: Molecular Function
Desc: Catalysis of facilitated diffusion of a potassium ion (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.
Proteins in PDR annotated with:
   This term: 208 [Search]
   Term or descendants: 605 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0005267 - potassium channel activity (interactive image map)
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