DXR — Daucus carota subsp. sativus

Summary

DCAR_026133 (symbol DXR) on carrot chromosome 7 encodes a DXP reductoisomerase, an enzyme with DOXP reductoisomerase activity (EC 1.1.1.267) that also binds NADPH and manganese. This enzyme operates in the methylerythritol phosphate (MEP) pathway and is associated with isoprenoid, chlorophyll, and phenylpropanoid anabolism, as well as primary metabolism and responses to UV-C, jasmonic acid, and salicylate. The protein localizes to the chloroplast stroma. In carrot, DXR is linked to plant growth and terpene biosynthesis. Related genes in other species are linked to chlorophyll accumulation, chloroplast development, carotenoid and isoprenoid biosynthesis, essential oil production, trichome initiation and development, stomatal closure, and pigmentation. Sequence similarity further links the family to traits including carotene, lycopene, anthocyanin, and carotenoid content, flower and fruit color, fruit weight, leaf size, plant height, and chloroplast development.