SAR1 — Triticum turgidum subsp. durum

Summary

TRITD3BV1G098660, designated TtSAR1, encodes a small GTPase of the SAR1 family, possessing GTPase activity, GTP binding, and additional annotated molecular functions including phospholipase activator activity and DNA-binding transcription activator activity. This durum wheat gene on chromosome 3B is associated with COPII vesicle coat formation, ER-to-Golgi transport, vesicle organization, and membrane organization. It is linked to the unfolded protein response, ER stress response, and secretion. Associations with agronomically relevant traits include temperature stress response, abiotic stress response, disease tolerance, root thickness and morphology, pollen development, and cell division. Studies of related genes in other species link the SAR1 family to grain size, seed size, grain shape, root development, flowering time, and plant height, as well as protein trafficking and stress acclimation.