NHX8 — Glycine max

Summary

GmNHX8 (GLYMA_08G092000V4) on soybean chromosome 8 encodes a cation/H+ exchanger of the CPA1 family with lithium:proton antiporter, potassium:proton antiporter and sodium:hydrogen exchanger activities. The protein localises to the vacuolar membrane and plasmalemma. It is associated with lithium export and transport, vacuolar membrane transport, cell pH regulation, potassium ion membrane transport, sodium import, ethanol fermentation, downregulation of photosynthesis, chlorophyll fluorescence, ALA metabolism, ATP anabolism, endocytosis, vesicle transport, protein folding and virus-induced PTGS. The gene has been linked to salt tolerance and lithium ion homeostasis, as well as to net photosynthetic rate, photosynthetic rate, salt response, seed size, root length and drought tolerance. Studies of related genes in other species connect the family to lithium tolerance and ion homeostasis.