PR5 — Nicotiana attenuata

Summary

A4A49_40335 (PR5, also known as TL1) in coyote tobacco (Nicotiana attenuata) encodes a thaumatin-like protein with glucan endo-1,3-beta-D-glucosidase activity, and is associated with IgE binding, mRNA binding, and protein binding. The gene is associated with defence responses including systemic acquired resistance, response to viruses, bacteria, and UV-B, as well as programmed cell death, cell wall biogenesis, and regulation of anthocyanin and ethylene anabolism. It localises to the apoplast, plant-type cell wall, secretory vesicle, vacuole, and plasmodesmata. Associations include leaf curling, osmotic stress response, proline accumulation, and tolerance to drought, salt, and fungal pathogens such as Verticillium dahliae, as well as resistance to Pseudomonas syringae. Studies of related genes in other species link the family to induced systemic resistance, herbivore defence, and seed germination under salt stress.