PR3 — Phaseolus vulgaris

Summary

PHAVU_002G114200, designated PvPR3 on French bean chromosome 2, encodes a protein with a Glyco_hydro_19 catalytic domain and a chitin-binding domain, and is annotated with chitinase activity and chitin binding. This gene is associated with defence responses to fungi, cell wall macromolecule catabolic processes, chitin and polysaccharide breakdown, and carbohydrate metabolism. It is linked to hypersensitive response programmed cell death, signal transduction, and jasmonic acid/ethylene-dependent systemic resistance via the ethylene-mediated signalling pathway. The product localises to the protoplasm, secretory vesicles, vacuoles, and extracellular space. PvPR3 has been connected to ethylene sensitivity, wilt symptom development, nematode resistance, salt tolerance, seed germination under salt stress, and pathogen resistance. Studies of related genes in other species link the family to disease resistance, salt response, and traits including plant height, chlorophyll content, and root number.