CCS — Daucus carota subsp. sativus

Summary

DcCCS (DCAR_006775) on carrot chromosome 2 encodes a protein with a copper/zinc superoxide dismutase domain and a heavy-metal-associated domain. The gene product has superoxide dismutase copper carrier activity and copper binding capability, and is associated with superoxide metabolism, cellular responses to ozone, UV-B, light intensity, and salinity, as well as cellular copper ion homeostasis, nitric oxide storage, and removal of superoxide radicals. It localizes to the chloroplast stroma, membrane, and cytoplasm. DcCCS is linked to carotene and carotenoid content, thermotolerance, carotenoid accumulation, arsenate stress response, and compromised bacterial resistance. Studies of related genes in other species connect the family to copper homeostasis, superoxide dismutase activity, and carotenoid biosynthesis traits including neoxanthin content, fruit size, and pollen fertility.