PR5 — Nicotiana attenuata

Summary

A4A49_03394 (PR5, TL1) in coyote tobacco (Nicotiana attenuata) encodes a thaumatin-like protein belonging to the osmotin/thaumatin-like superfamily, with glucan endo-1,3-beta-D-glucosidase activity and IgE binding. This gene is associated with defense responses, including systemic acquired resistance, defense response to fungi, cell death, and programmed cell death. It is linked to responses to abscisic acid and ethylene, as well as ethylene anabolism, signal transduction, and posttranscriptional regulation of gene expression. Additional associations include cell wall biogenesis, secretion, homeostasis, digestion, and response to thirst. The protein localizes to the apoplast and extracellular space. Leaf curling has also been connected to this gene. Studies of related genes in other species link the family to glucan endo-1,3-beta-glucosidase activity (EC 3.2.1.39).