VP2 — Oryza sativa Indica Group

Summary

BGIOSGA022419 (VP2, also known as OiVP2) on chromosome 6 of Indica rice encodes a proton-translocating pyrophosphatase (EC 7.1.3.1) belonging to the PPase-energised H-pump family, with additional annotated molecular functions including inorganic diphosphatase activity, RNA folding chaperone, SUMO transferase, and metal binding. The gene is associated with proton transmembrane transport, establishment of transmembrane electrochemical gradients, cold acclimation and response to cold, abscisic acid response, salinity response, and cell wall pectin metabolism. It is linked to seedling cold tolerance, cadmium accumulation, and traits including amylose content, grain length, grain size, leaf length, stomatal opening, and low temperature stress response. The product localises to the tonoplast, vacuolar membrane, Golgi cis cisterna, endosome membrane, and chloroplast envelope. Related genes in other species are linked to salt, drought, and phosphorus deficiency tolerance, grain yield, and root biomass.