NHX1 — Brassica juncea

Summary

BJUB04G41710S (BjNHX8, also known as NHX1 and SOS1) encodes a cation/H⁺ exchanger of the CPA1 family, with annotated lithium:proton and potassium:proton antiporter activity, sodium:hydrogen exchanger activity, and additional annotations for NAD ADP-ribosyltransferase, protein kinase and protein binding activities. The gene is associated with vacuolar membrane and tonoplast localisation, as well as chloroplast envelope, plasmalemma, cytoplasm and nucleus. It is linked to lithium export and transport, sodium import, cell pH regulation, photoprotection, detoxification, response to superoxide, hydrogen peroxide and ozone, chlorophyll fluorescence, ethylene signalling, calcium signalling, lateral root morphogenesis and nitric oxide anabolism. Associations with agronomic traits include yield, photosynthetic rate, chlorophyll content, plant height, root development and thickness, drought tolerance, disease tolerance, salt tolerance, sodium uptake, stomatal resistance, abscisic acid and jasmonic acid sensitivity, and high temperature stress response. Related genes in other species are linked to lithium tolerance, salinity tolerance, sodium homeostasis, potassium uptake and heat tolerance.