ADG1 — Arabidopsis thaliana

Summary

AT5G48300 (ADG1) in Arabidopsis thaliana encodes the small subunit of ADP-glucose pyrophosphorylase (AGPase; EC 2.7.7.27), a key enzyme in starch biosynthesis. The product possesses ADGase activity and is localized to the chloroplast stroma as part of the heterotetrameric ADPG pyrophosphorylase complex. ADG1 is associated with starch granule initiation, starch anabolism and breakdown, as well as responses to light intensity and red/far-red light stimuli. It has been linked to numerous traits including starch content and grain synthesis, biomass yield, photosynthetic ability, sucrose content, seedling hypocotyl length, leaf chlorophyll content, and photoperiod-sensitive flowering time. The gene is also connected to selenate uptake, sulfate assimilation, and triacylglycerol accumulation. Studies of related genes in other species link the family to starch yield, seed weight, and sugar content.