O2 — Zea mays

Summary

ZM00001EB301570 (O2, ZmRISBZ1) on maize chromosome 7 encodes a basic leucine zipper (bZIP) transcription factor with DNA-binding and protein dimerization activity. The gene is associated with numerous grain quality and yield traits, including chalky and floury endosperm, grain lysine, tryptophan, protein, starch, amylose, amylopectin, and ash content, as well as seed weight, size, length, width, and test weight. It is linked to biological processes such as nutrient and carbohydrate storage, lysine anabolism, carotenoid breakdown, glucose homeostasis, acquisition of desiccation tolerance, and response to starvation. The protein localizes to the nucleus. Related genes in other species are associated with seed development, grain filling, starch biosynthesis, endosperm texture, and grain protein content.