PSP — Brassica oleracea var. botrytis

Summary

BoPSP (PSP1) on cauliflower chromosome 5 encodes a protein with L-phosphoserine phosphatase activity and glucan endo-1,3-beta-D-glucosidase activity, belonging to the HAD-like SerB and X8 domain families. It is associated with L-serine metabolism, L-serine anabolism, and 1,3-beta-glucan breakdown, as well as sulfur amino acid metabolism and carbohydrate metabolism. The gene is linked to root development, embryo development ending in seed dormancy, and defense responses. It localises to plastids, plasmodesmata, the plasma membrane, cytoplasmic vesicles, and the extracellular space. Associations with pollen development, tapetum development, root growth, photorespiration, plant growth, and male fertility have been observed. Studies of related genes in other species link the family to serine biosynthesis, embryo development, and cadmium tolerance.