PR5 — Triticum aestivum

Summary

TRAESCS7D02G551400 (symbol PR5) on wheat chromosome 7D encodes a thaumatin-like protein, also known as PWIR2, belonging to the osmotin/thaumatin-like superfamily. This gene is associated with defence responses, including systemic acquired resistance, defence response to fungi, and killing of cells of other organisms. It is linked to responses to biotic and abiotic stimuli, stress, and cell death, as well as signal transduction and cell communication. Associations with pollen-pistil interaction, abscission, and response to endogenous stimuli have also been noted. The gene is associated with traits including wheat powdery mildew disease response, stripe rust, and cold tolerance, with powdery mildew resistance observed for PR5. Related genes in other species, such as RASTL family members and pathogenesis-related proteins 1A/1B and 1C, further link this family to defence functions. The encoded protein is localised extracellularly.