PR5 — Arabidopsis thaliana

Summary

AT1G75040 (PR5) in Arabidopsis thaliana encodes a pathogenesis-related protein 5 belonging to the thaumatin-like superfamily, with mRNA and protein binding activities. The gene is associated with pathogen resistance, herbivore defense, and disease tolerance, including resistance to Pseudomonas syringae and Verticillium dahliae. It is linked to cell wall integrity, seed germination under salt stress, and responses to osmotic stress, drought, and UV-B. PR5 localizes to the apoplast, plant-type cell wall, vacuole, and plasmodesmata, and is associated with salicylic acid and phytoalexin biosynthesis, as well as vitamin B6 and melatonin anabolism. Studies of related genes in other species link the family to late blight resistance in potato and nematode resistance in soybean.