GW2 — Oryza sativa Japonica

Summary

Os06g0652550 (GW2) in rice encodes a RING-type zinc finger protein with ubiquitin ligase activity, placing it in the Sip5/DA2 family. The gene is associated with the regulation of seed size, grain width, grain thickness, grain length, grain weight, and grain yield, as well as grain appearance, amylose content, and the grain filling period. It has been linked to seed shattering, seed dormancy, pre-harvest sprouting, and stigma exsertion. Additional associations include leaf color, chlorophyll content, chlorophyll breakdown and anabolism, leaf senescence, plant height, tiller number, days to heading, heterosis, and flower development. The encoded protein localizes to the cytoplasm and is associated with protein ubiquitination, nuclear export, chromatin modeling, demethylation, integument development, double fertilization, syngamy, mating, and carbohydrate metabolism. Related genes in other species link the family to grain protein content, flour protein content, and spikelet fertility.