SUS — Brassica oleracea

Summary

BoSUS (SUS, BoSUS1) on cabbage chromosome 9 encodes a sucrose synthase, a glycosyltransferase (EC 2.4.1.13) with sucrose synthase activity, and also possesses DNA-binding and transcription factor activity. It localises to the cytosol, nucleus and plasmodesmata. The gene is associated with sucrose metabolism and anabolism, carotene and chlorophyll anabolism, head development, shoot morphogenesis, auxin polar transport, and responses to flooding, hypoxia, sorbitol, mannitol and glucose. It is linked to grain yield, fruit quality, total soluble sugar and sucrose content, seed size, carotenoid and anthocyanin content, brassinosteroid content and sensitivity, auxin sensitivity, photoperiod sensitivity, and vegetative-to-reproductive phase transition. Associations also include root development, leaf senescence, cell elongation, and tolerance to high and low temperature, oxidative and osmotic stress. Studies of related genes in other species link the family to starch biosynthesis, carbon allocation, UDP-glucose regeneration, and anaerobic stress response.