A transient receptor potential channel protein that is a member of the subfamily C of the transient receptor potential cation channels (TRPs), with amino- and carboxyl-terminal intracellular domains separated by a domain (common with other ion channels) containing six transmembrane helices (S1-S6) in which the last two helices (S5 and S6) flank a loop, called the pore loop, which determines ion selectivity. The amino-terminal domain contains up to 4 detectable copies of Ankyrin repeat (Pfam:PF00023) followed by the Transient receptor ion channel II domain (Pfam:PF08344). Most TRPs are relatively non-selective. They may be modulated by voltage changes but channel gating is generally effected by other means. [ http://www.ncbi.nlm.nih.gov/pubmed/16382100 http://www.ncbi.nlm.nih.gov/pubmed/17579562 http://www.ncbi.nlm.nih.gov/pubmed/16460286 ]