PR5 — Nicotiana attenuata

Summary

A4A49_26337 (NaPR5) in coyote tobacco (Nicotiana attenuata) encodes a pathogenesis-related protein 5, a member of the thaumatin and osmotin/thaumatin-like superfamily. The product exhibits glucan endo-1,3-beta-D-glucosidase activity and is associated with IgE binding. NaPR5 is associated with systemic acquired resistance, defence response to fungi, programmed cell death, and responses to salicylate, ethylene, abscisic acid, and arachidonate. It is also associated with posttranscriptional regulation of gene expression, ethylene anabolism, cell wall biogenesis, secretion, digestion, homeostasis, salinity response, and leaf curling. The protein localises to the apoplast and extracellular space. Related genes in other species link the family to glucan endo-1,3-beta-glucosidase activity (EC 3.2.1.39).