SAR1 — Triticum turgidum subsp. durum

Summary

TRITD5AV1G047820, designated TtSAR1 on durum wheat chromosome 5A, encodes a small GTPase of the SAR1 family, possessing GTPase activity, GTP binding, and phospholipase activator activity. The protein is a component of the COPII vesicle coat and localises to ER exit sites and Golgi membranes, consistent with its associations with ER-to-Golgi transport, vesicle organisation, and secretion. TtSAR1 is associated with the unfolded protein response, ER stress response, and detoxification, as well as pollen development, cell division, and heat response. The gene is associated with temperature stress response, abiotic plant stress response, disease tolerance, root thickness, and root morphology. Studies of related genes in other species connect the family to protein trafficking and stress acclimation, and to seed and endosperm traits.