PR5 — Nicotiana attenuata

Summary

A4A49_59517 (PR5, also known as TL1) in Nicotiana attenuata encodes a protein of the osmotin/thaumatin-like superfamily, with glucan endo-1,3-beta-D-glucosidase activity, IgE binding, mRNA binding, and protein binding functions. It is associated with systemic acquired resistance, defence responses to bacteria and viruses, programmed cell death, and regulation of anthocyanin and ethylene anabolism. The protein localises to the apoplast, plant-type cell wall, vacuole, plasmodesmata, and secretory vesicles. Associations include responses to cadmium, UV-B, ethylene, and osmotic stress, as well as leaf curling, proline accumulation, and resistance to insects, fungi (including Verticillium dahliae), and bacteria (Pseudomonas syringae). It is also linked to salt and drought tolerance, abscisic acid response, and disease resistance. Studies of related genes in other species connect the family to pathogen resistance, herbivore defence, and seed germination under salt stress.