BE3 (TRAESCS2B02G309500) — triticum aestivum

Summary

TRAESCS2B02G309500 (symbol BE3, also known as SBEI, SBEIIA, or TaSBE2.2-2B) on bread wheat chromosome 2B encodes a 1,4-alpha-glucan branching enzyme (EC 2.4.1.18) with isoamylase and O-glucosyl hydrolase activities, belonging to the glycoside hydrolase 13 family and containing an A-amylase/branching C domain. The gene is associated with starch and amylopectin anabolism and breakdown, glycogen anabolism, carbohydrate metabolism, endosperm and seed development, and protein phosphorylation. It localises to the amyloplast, chloroplast stroma, and cytoplasm. Associations with grain traits include starch content, amylose content, resistant starch content, grain size, grain width, and grain protein content. Studies of related genes in other species link the family to starch biosynthesis in the endosperm, while sequence similarity connections extend to grain weight, yield, drought tolerance, and seedling vigor.