SS3 — Oryza sativa Indica Group

Summary

BGIOSGA028122 (symbol SS3, also known as OiSS3) encodes a starch synthase with alpha-1,4-glucan glucosyltransferase activity (EC 2.4.1.21), containing a starch synthase catalytic domain and a carbohydrate-binding module (CBM25). This indica rice gene on chromosome 8 is associated with amyloplast localisation and starch biosynthesis pathways. It is linked to endosperm and seed development, regulation of starch metabolism, and amylopectin anabolism. The gene has been connected to several grain quality traits including chalky endosperm, starch content, glucose content, grain size, and pericarp color. Associations also include starch granule initiation, morphology, and synthesis rate, as well as leaf starch structure and amylopectin chain length. Studies of related genes in other species link the family to starch metabolism, amylose content, and starch phosphate content.