HA2 — Brassica oleracea

Summary

BoHA2 (HA2, AHA2) on cabbage chromosome 7 encodes a P-type ATPase IIIA family proton pump with proton-transporting ATPase activity, also annotated for guanylyl cyclase, transmembrane signaling receptor, peptide receptor, voltage-sensitive potassium channel, cis-trans proline isomerase, phosphatase, nucleotide, magnesium, calmodulin and protein kinase activities. It is associated with proton export, cell pH regulation, response to pH, very-long-chain fatty acid metabolism, negative regulation of leaf senescence and the hypersensitive response, phloem transport, leaf vascular tissue pattern formation, and defense responses. The gene has been linked to traits including alkali soil sensitivity, photosynthetic rate, water stress, bacterial disease response, iron content, shoot growth angle, lateral root length, brassinosteroid and auxin sensitivity, cell elongation, arsenic concentration, temperature stress responses, root development, leaf senescence, seed growth, and abscisic acid sensitivity. Related genes in other species are associated with plasma membrane H⁺-ATPase activity, salt tolerance, root growth, cell elongation, drought tolerance, plant immunity, and iron deficiency tolerance.