PR5 — Solanum tuberosum

Summary

PGSC0003DMG400003571, designated StPR5 on potato chromosome 2, encodes a zeamatin protein belonging to the osmotin/thaumatin-like superfamily. The product exhibits glucan endo-1,3-beta-D-glucosidase activity, binds IgE, mRNA, and proteins, and localises to the apoplast, cell wall, vacuole, plasmodesmata, secretory vesicles, membrane, and mitochondria. StPR5 is associated with late blight resistance, defence responses to bacteria, fungi, and viruses, systemic acquired resistance, cell death, responses to abscisic acid, ethylene, UV-B, cadmium, and osmotic stress, as well as regulation of anthocyanin anabolism, proline accumulation, and salt and drought tolerance. It is associated with insect resistance, resistance to Verticillium dahliae and Pseudomonas syringae, and disease resistance generally. Studies of related genes in other species link the family to pathogen resistance, induced systemic resistance, herbivore defence, and seed germination under salt stress.