PR5 — Nicotiana attenuata

Summary

A4A49_61164 (symbol PR5, also known as 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 capacity. The gene is associated with defence responses, including systemic acquired resistance, defence response to fungi, cell death, and programmed cell death. It is linked to ethylene anabolism and response to ethylene, response to abscisic acid, signal transduction, posttranscriptional regulation of gene expression, and regulation of gene expression. Additional associations include cell wall biogenesis, secretion, digestion, homeostasis, response to thirst, and killing of cells of other organisms. The protein localises to the apoplast and extracellular space. The gene has also been connected to leaf curling. Studies of related genes in other species link the family to glucan endo-1,3-beta-glucosidase activity (EC 3.2.1.39).