NHX1 — Arabidopsis thaliana

Summary

AT5G27150 (NHX1) in Arabidopsis thaliana encodes a sodium/hydrogen exchanger belonging to the NaH_exchanger and cation/H_exchanger CPA1 families. The protein exhibits sodium:hydrogen exchanger, potassium:proton antiporter, and lithium:proton antiporter activities, and is localized to the tonoplast, vacuolar membrane, and endomembrane system. NHX1 is associated with vacuolar pH homeostasis, sodium ion accumulation and homeostasis, potassium uptake, and heat and salt stress tolerance. It has been linked to biomass production, root yield, and leaf potassium content, as well as traits including sodium and potassium content, cell membrane stability, chlorophyll content, and yield. The gene is also connected to regulation of ion transport, betaine and heme anabolism, and protein localization to the plasma membrane.