ATP6 — Sorghum bicolor

Summary

SORBI_3003G183300 (SbATP6) on sorghum chromosome 3 encodes a secretory class III peroxidase (EC 1.11.1.7) with lactoperoxidase and peroxidase activity, heme binding, and metal binding. This peroxidase is associated with cell wall polysaccharide breakdown, plant-type cell wall modification, mucilage extrusion from the seed coat, lignin anabolism, anther wall tapetum development, nodulation, hydrogen peroxide catabolism, RNA processing, and responses to oxidative stress and other organisms. It localises to the vacuole, plant-type cell wall, and extracellular space. The gene has been connected to cytoplasmic male sterility, photosynthetic rate, and peroxidase-71 content, as well as phenotypes including seed coat mucilage extrusion, pollen development, male fertility, and tapetal and general cell wall integrity. Studies of related genes in other species link the family to lignin biosynthesis and secondary cell wall thickness, as well as to cold stress and root, shoot, flower, and pollen development.