EP3 — Oryza sativa Japonica

Summary

OS06G0726200 (EP3, also known as Cht1, OsPR3, or CHI-B) encodes a protein with glycoside hydrolase family 19 and chitin-binding domains, possessing chitinase and beta-N-acetylglucosaminidase activities, chitin-binding capacity, and is annotated with EC 3.2.1.14. The encoded protein is localized extracellularly. This rice gene is associated with chitin breakdown, cell wall macromolecule catabolism, polysaccharide degradation, and amino sugar metabolism. It is also linked to wax metabolism, diterpenoid metabolism, and cellulose anabolism. At the agronomic level, EP3 is associated with grain yield, grain weight, grain length and width, seed size and shape, seedling vigor, germination rate, plant height, brittle culm, chlorophyll content, heat tolerance, and oxidative stress response. Studies of related genes in other species link the family to resistance to fungal pathogens.