CCD4 — Brassica oleracea var. botrytis

Summary

BoCCD4, located on chromosome 3 of cauliflower (Brassica oleracea var. botrytis), encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding. The gene is associated with beta-carotene and carotene breakdown, as well as lycopene, beta-carotene, xanthophyll, and abscisic acid anabolism. It has been linked to carotenoid and chlorophyll content, chloroplast development, leaf development and senescence, seed beta-carotene content, and apocarotenoid signaling. Additional associations include responses to salicylate, gibberellin, auxin, and thirst, along with anther and pollen development, fruit ripening, and ABA signaling. The product localizes to the chloroplast stroma, cytosol, nucleus, and plastoglobules. Studies of related genes in other species connect the family to carotenoid degradation, apocarotenoid glycoside biosynthesis, and chloroplast RNA editing.