HPD — Brassica oleracea var. botrytis

Summary

BoHPD (HPD) on cauliflower chromosome 5 encodes a 4-hydroxyphenylpyruvate dioxygenase (HPPD), an enzyme with 4-hydroxyphenylpyruvate dioxygenase activity that binds iron and metal ions. The gene is associated with the anabolism of plastoquinone, vitamin E, vitamin A, and carotenoids, as well as the catabolism of L-phenylalanine and tyrosine. It has been connected to tocopherol and plastoquinone biosynthesis. The encoded protein is localised to the cytosol, mitochondria, and extracellular space. Studies of related genes in other species link the HPD family to herbicide response and binding, tocopherol content and composition, tocotrienol production, and photosynthesis. Sequence similarity further connects the family to leaf necrosis, leaf temperature, protein content, seed weight, and salt tolerance.