PR5 — Solanum lycopersicum

Summary

SlPR5 (SOLYC03G118780.3) encodes a thaumatin-like protein with glucan endo-1,3-beta-D-glucosidase activity, belonging to the osmotin/thaumatin-like superfamily. It is associated with diverse biological processes including regulation of proline, lycopene, salicylic acid, auxin, ethylene, and chlorophyll anabolism, as well as photoperiodism, fermentation, and response to cadmium. The protein localizes to the apoplast, plant-type cell wall, vacuole, plasmodesmata, secretory vesicles, and mitochondria. SlPR5 is linked to agronomically important traits such as fruit shape, sugar content, protein content, seed size, and stomatal opening. It is also associated with disease resistance, including resistance to Verticillium dahliae and Pseudomonas syringae, as well as salt and drought tolerance, osmotic stress response, and ABA sensitivity. Studies of related genes in other species link the family to pathogen resistance, late blight resistance, and herbivore defense.