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null Catalysis of facilitated diffusion of a calcium 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 energy-independent passage of cations across a lipid bilayer down a concentration gradient. Catalysis of the transmembrane transfer of a cation by a channel that opens when extracellular ATP has been bound by the channel complex or one of its constituent parts. Catalysis of the transfer of an ion from one side of a membrane to the other. Catalysis of facilitated diffusion of a sodium ion (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism. Catalysis of energy-independent facilitated diffusion, mediated by passage of a specific solute through a transmembrane aqueous pore or channel. Stereospecificity is not exhibited but this transport may be specific for a particular molecular species or class of molecules. Catalysis of the transmembrane transfer of a cation by a channel that opens when intracellular cyclic nucleotide has been bound by the channel complex or one of its constituent parts. Catalysis of the transfer of cation from one side of the membrane to the other. 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 a cation by a voltage-gated channel. A cation is a positively charged ion. Catalysis of the transfer of metal ions from one side of a membrane to the other. Catalysis of facilitated diffusion of ammonium (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism. Catalysis of the transfer of a zinc ion or zinc ions from the inside of the cell to the outside of the cell across a membrane: Zn2+(out) = Zn2+(in). The activity is driven by proton motive force. Catalysis of facilitated diffusion of a hydrogen 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 calcium concentration-regulatable energy-independent passage of cations 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. null

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: cation channel activity
Acc: GO:0005261
Aspect: Molecular Function
Desc: Catalysis of the energy-independent passage of cations across a lipid bilayer down a concentration gradient.
Synonyms:
  • nonselective cation channel activity
  • cation diffusion facilitator activity
  • GO:0015281
  • GO:0015338
Proteins in PDR annotated with:
   This term: 83 [Search]
   Term or descendants: 1250 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0005261 - cation channel activity (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle