PR5 — Nicotiana attenuata

Summary

A4A49_39145 (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 to bacteria and viruses, systemic acquired resistance, programmed cell death, regulation of anthocyanin and ethylene biosynthesis, response to cadmium and UV-B, and posttranscriptional regulation of gene expression. Its product localises to the apoplast, plant-type cell wall, vacuole, plasmodesmata, secretory vesicles, and mitochondria. The gene is linked to disease resistance (including against Pseudomonas syringae and Verticillium dahliae), insect resistance, salt and drought tolerance, osmotic stress response, proline accumulation, and leaf curling. Studies of related genes in other species further connect the PR5 family to pathogen resistance, herbivore defence, and seed germination under salt stress.