ISA — Zea mays
Summary
ZM00001EB174590 (Su1, ISA) on maize chromosome 4 encodes a protein with isoamylase activity, 1,4-alpha-glucan branching enzyme activity, and cation binding. This gene is associated with starch biosynthesis and accumulation, and is linked to amylopectin synthesis, amyloplast organization, and carbohydrate storage. Su1 is associated with numerous grain traits including sugary and floury endosperm, starch concentration, amylose content, starch grain shape and digestibility, seed weight and size, grain appearance and color, and popping expansion volume. It is also linked to seedling vigor, coleoptile length, ear length, aluminum tolerance, cadmium concentration, cold tolerance, and nitrogen utilization. The gene product localizes to the amyloplast and chloroplast isoamylase complex. Studies of related genes in other species link the family to amylopectin biosynthesis, reduced leaf starch, and increased soluble glucan accumulation.
Annotations
- Chromosome
- 4
- Related genes
- ISA, ISA1
- GO terms
- homeostasis, structural organization, syngamy, taste, Regeneration, protein synthesis, Segmentation, Learning
- Publications
- 15749471, 23393426, 25663508, PMID:15862090, PMID:7773016, PMID:12834068, PMID:16953433, PMID:20018713
- Traits
- arabinose metabolism, Modified amylopectin structure with increased short chains, decreased long chains, Reduced Starch, Increased Soluble Glucan Accumulation, Reduced Leaf Starch Content, Defective Amylopectin Biosynthesis, Reduced Starch, Phytoglycogen Production, No Change in Amylose-Amylopectin Ratio, Normal Maltose and Maltotriose Production, Increased water soluble polysaccharides content