PR3 — Solanum tuberosum

Summary

PGSC0003DMG400008673, also known as PR3 or SK2, is a potato gene on chromosome 2 that encodes an endochitinase (chitinase) belonging to the glycosyl hydrolase 19 family. The encoded protein exhibits chitinase activity and chitin binding, and is associated with cell wall macromolecule catabolic processes, chitin and polysaccharide breakdown, and carbohydrate metabolism. PR3 is associated with defense responses, including systemic acquired resistance, induced systemic resistance, jasmonic acid/ethylene-dependent systemic resistance, defense response to fungi, response to wounding, and cell death. It is associated with pathogen resistance, disease resistance, nematode resistance, salt tolerance, and seed germination under salt stress. The protein localizes to secretory vesicles, vacuoles, and the extracellular space. Associations with starch yield, starch content, chlorophyll content, photosynthetic rate, and ethylene sensitivity have also been noted.