HA1 — Brassica oleracea var. botrytis

Summary

BoHA1 (HA1) on cauliflower chromosome 7 encodes a P-type ATPase IIIA family member with proton-transporting ATPase activity, also annotated for guanylyl cyclase, voltage-sensitive potassium channel, SUMO transferase, and protein kinase activities. It is associated with proton export across the plasma membrane, cell pH regulation, very-long-chain fatty acid metabolism, and negative regulation of the hypersensitive response. The gene is linked to viral spread, plasmodesma-mediated transport, sumoylation, and defense responses to bacteria and viruses. Traits connected to BoHA1 include drought tolerance, water stress response, photosynthetic rate, stomatal closure time, leaf senescence, root and shoot growth, manganese sensitivity, and responses to high and low temperature, oxidative stress, and abscisic acid. Localization evidence places the product at the plasma membrane, plasmodesmata, endoplasmic reticulum, Golgi, vacuole, and stress granules. Related genes in other species link the family to salt tolerance, aluminum resistance, pathogen defense, stomatal ABA responsiveness, and programmed cell death suppression.