ATP6 — Sorghum bicolor

Summary

SORBI_3006G079300 (SbATP6) on sorghum chromosome 6 encodes a secretory class III peroxidase (EC 1.11.1.7) with lactoperoxidase and peroxidase activity, heme binding, and metal binding. This haem peroxidase is associated with cell wall polysaccharide breakdown, plant-type cell wall modification, mucilage extrusion from seed coat, anther wall tapetum development, lignin anabolism, hydrogen peroxide catabolism, and responses to oxidative stress and other organisms. It localises to the vacuole, plant-type cell wall, and extracellular space. The gene is linked to peroxidase-71 content, cytoplasmic male sterility, and photosynthetic rate, as well as phenotypes including seed coat mucilage extrusion, pollen development, male fertility, and tapetal cell wall integrity. Studies of related genes in other species connect the family to lignin biosynthesis, secondary cell wall thickness, and fluoranthene accumulation.