PR5 — Sorghum bicolor

Summary

SORBI_3002G351400, designated SbPR5 (also known as SbOSM34 or SbTLP), encodes a zeamatin-like protein belonging to the thaumatin family. The product exhibits beta-glucanase, endo-1,3(4)-beta-glucanase, serine-type endopeptidase inhibitor, and protein-binding activities. SbPR5 is associated with antifungal and antibacterial defense responses, antiviral response, and the antifungal innate immune response. It is linked to responses to jasmonic acid, ethylene, UV-B, and salinity, as well as seed germination. The protein localizes to secretory vesicles, the vacuole, and the extracellular space. SbPR5 has been connected to photosynthetic rate, respiration rate, osmotic stress response, proline accumulation and biosynthesis, and abscisic acid response. Studies of related genes in other species link the family to grain yield, grain texture, drought tolerance, stem rust, chlorophyll content, root length, and stomatal resistance.