PR5 — Oryza sativa Indica Group

Summary

BGIOSGA031026, designated PR5 (also known as OiPR5, TOND1, and OSML) in Indica rice on chromosome 9, encodes a thaumatin-like protein containing a thaumatin domain and an osmotin/thaumatin-like superfamily signature. The product exhibits glucan endo-1,3-beta-D-glucosidase activity and is associated with IgE binding. It localizes to the apoplast and extracellular space. PR5 is associated with defence responses, including defence against fungi and killing of cells of other organisms, as well as response to abscisic acid, signal transduction, the TCA cycle, and phenylpropanoid anabolism. The gene has also been connected to grain yield. Related genes in other species link the family to glucan endo-1,3-beta-glucosidase activity (EC 3.2.1.39).