HMA2 — Brassica napus

Summary

BnHMA2 (DARMORV10_C01P09010.1) on oilseed rape chromosome C01 encodes a P-type ATPase of the IB subfamily with divalent copper, monovalent copper, zinc, cadmium and calcium transporter activities, as well as calmodulin binding and ATP hydrolase activity. The gene is associated with detoxification of copper ions, copper and zinc ion homeostasis, response to toxic substances, cold response, and pollen germination. It localises to the vacuolar, Golgi and plasma membranes. BnHMA2 is associated with cadmium tolerance, translocation and accumulation, zinc partitioning and transport, metal homeostasis, fungal resistance, photosynthetic rate, germination rate and stomatal resistance. Related genes in other species are linked to cadmium xylem loading, long-distance cadmium translocation, and zinc homeostasis.