GLUTR — Cucumis sativus

Summary

CSA_2G372750 (GLUTR, also known as HEMA1) on cucumber chromosome 2 encodes glutamyl-tRNA reductase (EC 1.2.1.70). The product possesses glutamyl-tRNA reductase activity, NADP binding and protein binding, and localises to the chloroplast thylakoid membrane, envelope and stroma. In cucumber, HEMA1 is associated with chlorophyll biosynthesis, and the gene is linked to a wide range of photosynthetic and pigment-related processes including chlorophyll metabolism, carotenoid anabolism, photoprotection, de-etiolation, photorespiration and the photosynthetic electron transport chain. Associations with agronomic traits include leaf and fruit colour, chlorophyll content, net photosynthetic rate, plant height, nitrate and proline content, and chilling tolerance. Studies of related genes in other species link glutamyl-tRNA reductases to 5-aminolevulinic acid synthesis, heme biosynthesis, plastid signalling and salt tolerance.