VP2 — Oryza sativa Indica Group

Summary

BGIOSGA003429 (VP2, also known as OiVP2, OiCHALK5, and AVP1) on chromosome 1 of Indica rice encodes an uncharacterized protein with proton-translocating pyrophosphatase activity, inorganic diphosphatase activity, RNA folding chaperone activity, SUMO transferase activity, SUMO binding, kinase binding, mRNA binding, zinc binding, and protein binding. It is associated with the vacuolar membrane, tonoplast, Golgi, and endosomes, and linked to establishment or maintenance of transmembrane electrochemical gradient, cell wall pectin metabolism, regulation of starch biosynthetic process, auxin polar transport, sucrose metabolism, sumoylation, and responses to cold, abscisic acid, salinity, and thirst. The gene has been connected to seedling cold tolerance, cadmium accumulation, and traits including amylose content, grain length, grain size, leaf length, stomatal opening, chalkiness, heat tolerance, phosphate starvation tolerance, and biomass accumulation. Studies of related genes in other species link the family to salt, drought, and low nitrogen stress tolerance, vacuole acidification, and grain yield.