DCE — Daucus carota subsp. sativus

Summary

DCAR_026838 (DcDCE) on carrot chromosome 8 encodes a glutamate decarboxylase (EC 4.1.1.15) with pyridoxal phosphate-dependent decarboxylase and transferase domains, and also exhibits sphinganine-1-phosphate aldolase activity. The enzyme binds pyridoxal phosphate, calmodulin, calcium ions, and proteins, and localises to multiple cellular compartments including the ER membrane, plastid, plasmodesma, mitochondria, cytosol, and nucleus. DcDCE is associated with glutamate and sphingolipid breakdown, GABA formation, calcium ion detection, mechanical stimulus response, and carboxylic acid metabolism. The gene has been linked to shoot growth angle, photosynthetic rate, stomatal complex closure time, root development, leaf senescence, seed growth and development, flowering time, ethylene sensitivity, abscisic acid sensitivity, jasmonic acid content, and salt tolerance. Phenotypic associations include drought tolerance, heat stress tolerance, bacterial pathogen resistance, water-use efficiency, hypoxia-induced alanine accumulation, and altered cuticular wax and embryo development.