PR5 — Nicotiana attenuata

Summary

A4A49_29331 (NaPR5) on chromosome 1 of coyote tobacco (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. The gene is associated with defence responses including systemic acquired resistance, response to viruses, bacteria, UV-B, ethylene and cadmium, as well as programmed cell death, cell wall biogenesis, secretion, regulation of anthocyanin anabolism and posttranscriptional regulation of gene expression. It localises to the apoplast, plant-type cell wall, secretory vesicle, vacuole, plasmodesma, membrane and mitochondria. Associations include leaf curling, osmotic stress response, proline accumulation, disease resistance to Pseudomonas syringae and Verticillium dahliae, insect resistance, salt and drought tolerance, and UV-B stress response. Studies of related genes in other species link the family to pathogen resistance, induced systemic resistance, herbivore defence, nematode resistance and seed germination under salt stress.