EP3 — Oryza sativa Japonica

Summary

OS05G0399300 (EP3, also known as Cht2, OsPR3, and OsCHITINASE) on rice chromosome 5 encodes a protein with chitinase activity (EC 3.2.1.14), beta-N-acetylglucosaminidase activity, and chitin binding, and contains glycosyl hydrolase family 19 domains. The gene is associated with chitin breakdown, cell wall macromolecule catabolism, polysaccharide breakdown, and amino sugar metabolism. It is also linked to wax metabolism, diterpenoid metabolism, and jasmonic acid/ethylene-dependent systemic resistance. EP3 localizes to the apoplast, plant-type cell wall, vacuole, and secretory vesicle. The gene is associated with multiple agronomic traits including grain yield, grain weight, grain length and width, seed size, plant height, seedling vigor, brittle culm, cellulose content, chlorophyll content, heat tolerance, salt tolerance, germination rate, and ethylene sensitivity. It is also linked to pathogen resistance, nematode resistance, and response to Magnaporthe oryzae.