CCD1 — Nicotiana attenuata

Summary

A4A49_18324 (CCD1) on chromosome 1 of coyote tobacco (Nicotiana attenuata) encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding, belonging to the carotenoid oxygenase family. The gene is associated with carotenoid, carotene, and xanthophyll breakdown, as well as abscisic acid anabolism and signaling, and anther and pollen development. It is linked to responses to salicylate, gibberellin, auxin, and thirst, and to cellular homeostasis and virus-induced PTGS. The product localizes to the chloroplast stroma, cytosol, cytoplasm, plasmalemma, plant-type vacuole, Golgi complex, and plasmodesma. Associations include chlorophyll content, seed carotenoid content and degradation, abscisic acid biosynthesis, chromium tolerance, volatile and blumenol biosynthesis, and salicylic acid signaling. Studies of related genes in other species connect the family to fruit flavor, yield, ripening, carotenoid content, and stress tolerance traits.