BE3 — Solanum tuberosum
Summary
StBE3 (PGSC0003DMG400012398) on potato chromosome 7 encodes a protein with 1,4-alpha-glucan branching enzyme activity, also annotated with aconitase activity, IRE binding, 4Fe-4S cluster binding, and metal binding. It is associated with starch granule initiation, amylopectin anabolism, starch metabolism, and the TCA and glyoxylate cycles, as well as citrate and isocitrate metabolism, digestion, PTGS, NO storage, and proteolysis. The gene has been linked to amylose content, starch digestibility, and starch branching in potato, and to starch synthesis, composition, and amylopectin structure. It is localised to the chloroplast stroma, mitochondria, and cytoplasm. Studies of related genes in other species connect the family to starch biosynthesis and altered starch chain length distribution, while sequence similarity links the family to traits including starch content, grain size, drought tolerance, and photosynthetic rate.
Annotations
- Chromosome
- 7
- Related genes
- BE3, SBE2.2
- GO terms
- Digestion, NO storage, amylopectin anabolism, Proteolysis, starch metabolism, TCA cycle, Cytoplasm, 4Fe-4S cluster binding
- 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