BE3 — Oryza sativa Indica Group

Summary

BGIOSGA015140 (BE3, also known as OiBE3, SBE2.2, or SBEIIA) on chromosome 4 of Indica rice encodes a 1,4-alpha-glucan branching enzyme with isoamylase activity, cation binding, and O-glucosyl hydrolase activity, belonging to the glycoside hydrolase superfamily. The gene is associated with starch and amylopectin anabolism, starch breakdown, carbohydrate metabolism, glycogen anabolism, digestion, and embryo development ending in seed dormancy. Its product localizes to the chloroplast isoamylase complex, amyloplast, chloroplast stroma, and cytoplasm. BE3 has been connected to starch digestibility, starch biosynthesis, endosperm development, amylopectin structure, reduced maltose accumulation, and glucose response. Related genes in other species are linked to grain weight, size, width, yield, seed weight, protein content, starch content, amylose content, resistant starch content, cooked grain elongation, seedling vigor, root length, drought tolerance, and photochemical quenching.