SBE1 — Triticum turgidum subsp. durum

Summary

TRITD2BV1G155490 (symbol SBE1, also known as TtSBE3 or SBEIIB) on durum wheat chromosome 2B encodes a 1,4-alpha-glucan branching enzyme, a glycosyl hydrolase family 13 protein with isoamylase activity and cation binding. This gene is associated with starch and amylopectin anabolism, amyloplast organization, glycogen anabolism, and starch breakdown. The gene is linked to amylose content, grain filling period, starch content, photosynthetic rate, grain weight, and grain yield. It localizes to the amyloplast, cytoplasm, and isoamylase complexes, and is associated with pathways including starch biosynthesis, seed development, and root gravitropism. Studies of related genes in other species connect the family to grain amylopectin content, starch gelatinization temperature, endosperm traits, flour particle size, bread loaf volume, seedling vigor, and grain texture.