KC1 — Solanum tuberosum

Summary

StKC1 (KC1) on potato chromosome 8 encodes a voltage-sensitive potassium channel of the KAT/AKT family, possessing a KHA domain, cyclic nucleotide-binding domain, and ankyrin repeats, and is annotated with Kir channel activity, voltage-sensitive potassium channel activity, and ubiquitin-protein transferase activity. The gene is associated with potassium uptake, stomatal opening, drought tolerance, and salt tolerance, as well as with wound healing, TOR signaling, pH reduction, jasmonic acid anabolism, seed germination, and nodulation. It localises to the plasma membrane, endoplasmic reticulum membrane, periarbuscular membrane, cytosol, and nucleus, and is linked to monoatomic ion channel complexes. Studies of related genes in other species connect the family to potassium transport and stress responses, though these functions are not yet established for StKC1 itself.