VP — Beta vulgaris subsp. vulgaris

Summary

BvVP (BVRB_020110) encodes a proton-translocating pyrophosphatase (EC 7.1.3.1) belonging to the PPase-energised H-pump family, with inorganic diphosphatase activity and additional annotated functions including RNA folding chaperone, SUMO transferase, and kinase binding activities. In sugar beet, this gene is associated with proton transmembrane transport, establishment of electrochemical gradients, auxin polar transport, sucrose and starch metabolism, cold acclimation, stress response, leaf and embryo development, and cell wall pectin metabolism. It localises to the tonoplast, vacuolar membrane, Golgi, endosomes, and chloroplast envelope. Associations include leaf length, stomatal opening, abscisic acid sensitivity, salt tolerance, root growth, biomass accumulation, photosynthesis, and carbon partitioning. Studies of related genes in other species link the family to drought tolerance, phosphorus use efficiency, and vacuole acidification.