APS1 — Brassica oleracea var. botrytis

Summary

BoAPS1 (APS1) on cauliflower chromosome 2 encodes a sulphate adenylyltransferase, an enzyme with ATP:sulphate adenylyltransferase, ADGase and kinase activities. The gene is associated with starch content, starch grain synthesis, starch biosynthesis, accumulation, degradation, cycling and metabolism, as well as photosynthetic capacity and reduced leaf starch content. It is linked to carbohydrate metabolism, stress responses including high and low temperature stress, cadmium response, detoxification, and plant stress response traits. Additional associations include sulfate accumulation, short stature, anthocyanin accumulation, and reduced apical dominance. The encoded protein localises to the chloroplast envelope and stroma, and is connected to procambium and phloem or xylem histogenesis, glucosinolate breakdown, selenium metabolism, and ergosterol and glycogen anabolism. Studies of related genes in other species link the family to sulphate assimilation, sulphate concentration and flowering time.