BE3 — Solanum tuberosum
Summary
StBE3 (PGSC0003DMG400022307) on potato chromosome 7 encodes a starch branching enzyme with 1,4-alpha-glucan branching enzyme activity and cation binding, belonging to the alpha-amylase/branching_C and glycosyl hydrolase families. The gene is associated with amylopectin and starch anabolism, starch granule initiation, starch breakdown, and digestion, and localises to the amyloplast and chloroplast stroma. In potato, StBE3 is linked to amylose content, starch digestibility, and starch branching. It is also associated with starch synthesis, composition, amylopectin structure, and reduced maltose accumulation. Studies of related genes in other species link the family to grain size, starch yield, drought tolerance, photosynthetic rate, and seed protein content, as well as phenotypes including altered starch granule size and chain length distribution.
Annotations
- Chromosome
- 7
- Related genes
- BE3, SBE2.2
- GO terms
- Digestion, NO storage, glycogen anabolism, enzyme activity, starch breakdown, amylopectin anabolism, Proteolysis, starch metabolism
- Publications
- 26715025, 18989364, 14759260, 18218973, 15656970, 23393426, 25663508, 16615871
- Traits
- Polymerization Profile Similar to be2/be3 Mutants, Reduced Maltose Accumulation, Normal Sugar Levels Compared to Wild Type, Severely Reduced Plant Size and Biomass, Altered Malto-oligosaccharide Composition, Cytosolic Maltose Accumulation, Viable Seed Production Despite Mutation, Increased Starch Phosphorylase Activity