TRPV3 Gene: Function, Mutations, and Associated Diseases

TRPV3 encodes a member of the transient receptor potential (TRP) family of ion channels, specifically the vanilloid subfamily. The protein forms a non-selective cation channel that is activated by warm temperatures (threshold ~33°C) and by chemical ligands such as camphor, carvacrol, and 2-APB. TRPV3 is highly expressed in keratinocytes and plays a critical role in skin physiology, including thermosensation, barrier function, hair growth, and wound healing. Gain-of-function mutations in TRPV3 cause Olmsted syndrome, a rare congenital disorder characterized by palmoplantar and periorificial keratoderma, severe itching, and hair abnormalities.

Tissue Expression

Cell Line Expression

Hotspot Mutations

Mutation functional classification

• Thermosensation (REACT: R-HSA-449147)

• Calcium signaling pathway (KEGG: hsa04020)

• TRP channel activation (REACT: R-HSA-3295580)

• Keratinocyte differentiation (REACT: R-HSA-6809371)

The TRPV3 protein is a 791-amino acid, six-transmembrane domain cation channel that assembles as a tetramer. It is activated by warm temperatures (33-39°C) and by natural compounds like camphor and carvacrol. The channel is permeable to Ca2+, Na+, and K+, with a preference for Ca2+. In keratinocytes, TRPV3 regulates calcium influx essential for differentiation, barrier formation, and wound healing. Gain-of-function mutations cause Olmsted syndrome, while loss-of-function variants may impair skin homeostasis. The protein is also implicated in itch and pain signaling.