PR5 — Capsicum annuum

Summary

CaPR5 (T459_32121) on pepper chromosome PGAv.1.6.scaffold588 encodes a thaumatin-like protein with glucan endo-1,3-beta-D-glucosidase activity, IgE binding, and mRNA binding. This PR5 family member is associated with immune responses, including systemic acquired resistance, hypersensitivity, cell death, and defence responses to bacteria, fungi, and viruses. It is linked to responses to abscisic acid, ethylene, UV-B, and cadmium, as well as regulation of anthocyanin metabolism and the metabolic burst. The protein localises to the apoplast, plant-type cell wall, vacuole, plasmodesma, secretory vesicles, and mitochondria. CaPR5 has been connected to agronomic traits including plant height, leaf area index, stem diameter, and chlorophyll content, and to stress tolerances such as drought, salt, and osmotic stress responses, along with resistance to pathogens including Verticillium dahliae and Pseudomonas syringae.