has primary input has small molecule activator calcium-activated cation channel activity https://github.com/geneontology/go-ontology/issues/24605 https://github.com/geneontology/go-ontology/issues/28979 Enables the transmembrane transfer of an inorganic cation by a channel that opens when a calcium cation has been bound by the channel complex or one of its constituent parts. Reactome:R-HSA-9717383 calcium activated cation channel activity molecular_function GO:0005227 intracellular calcium-activated potassium channel polycystin gated channel activity monoatomic ion-gated channel activity ligand-gated monoatomic cation channel activity