SUS — Brassica juncea

Summary

BJUA03G49210S (SUS) encodes a protein with sucrose synthase activity (EC 2.4.1.13) and is also annotated with DNA binding and DNA binding transcription factor activity. The protein localises to the cytosol, nucleus and plasmodesmata. In Indian mustard, SUS is associated with sucrose metabolism, responses to anoxia, flooding, hypoxia, sorbitol, mannitol, glucose and sucrose, as well as ROS metabolism, auxin polar transport, cell cycle modulation, DNA damage response, cellular homeostasis, seed and ovule development. The gene is linked to numerous agronomic traits including grain yield, seed size, total soluble sugar content, fruit quality, carotenoid and anthocyanin content, water use efficiency, flowering time, photoperiod sensitivity, brassinosteroid content and sensitivity, auxin sensitivity, root development and thickness, leaf senescence, and responses to high and low temperature stress. Studies of related genes in other species connect the family to anaerobic stress response, carbon allocation, UDP-glucose regeneration, chilling tolerance, and floral transition.