EP3 — Oryza sativa Japonica

Summary

OS06G0726100 (EP3, also known as Cht3, OsPR3, or OsCHITINASE) on rice chromosome 6 encodes a chitinase with beta-N-acetylglucosaminidase activity, chitin binding, and protein binding capabilities, belonging to the glycosyl hydrolase 19 family. This gene is associated with chitin and polysaccharide breakdown, cell wall macromolecule catabolic processes, amino sugar metabolism, and wax metabolism. It is linked to the jasmonic acid/ethylene-dependent systemic resistance pathway and responses to amitrole and silver ion. The encoded protein localizes to the apoplast, plant-type cell wall, vacuole, secretory vesicle, and extracellular space. EP3 is associated with numerous agronomic traits including grain yield, grain weight, grain length and width, seed size, seedling vigor, plant height, brittle culm, cellulose content, chlorophyll content, heat tolerance, salt tolerance, germination rate, and ethylene sensitivity. It is also linked to pathogen resistance and nematode resistance.