KC1 — Oryza sativa Japonica

Summary

OsKC1 (OS05G0428700) on rice chromosome 5 encodes a protein belonging to the KAT/AKT family, characterized by ankyrin repeats, a cyclic nucleotide-binding domain, and an ion transport domain. The protein is annotated with outward rectifier potassium channel activity, ion transporter activity, and ATPase inhibitor activity. OsKC1 is associated with potassium homeostasis, translocation, and distribution, as well as responses to salt, drought, and osmotic stress. It has been linked to stomatal opening, reactive oxygen species production, and grain shape and yield traits. The gene is associated with panicle potassium content, leaf necrosis tolerance, spikelet sterility, and sensitivity to alkali soil, magnesium, and nitrogen. Localization evidence places the protein at the apical plasma membrane, cell plate, and pollen tube tip. Related genes in other species link the family to guard cell ion flux, sodium tolerance, and root gravitropism.