NHX1 — Brassica juncea

Summary

BJUB06G14470S, designated NHX1, encodes a potassium:proton antiporter and sodium:hydrogen exchanger on chromosome B06 of Indian mustard (Brassica juncea). The product contains a cation/H+ exchanger transmembrane domain and a UbiB kinase domain, and localises to the vacuolar membrane and plasmalemma. This gene is associated with vacuolar membrane transport, sodium import, cell pH regulation, potassium ion membrane transport, photoprotection, detoxification, calcium signaling, chlorophyll fluorescence, stress response, homeostasis, and activation of salinity response. It has been connected to chlorophyll content and salt tolerance. Related genes in other species link the family to vacuolar sodium sequestration and salt tolerance.