GDH1 — Solanum lycopersicum

Summary

SlGDH1 (SOLYC10G078550.4) on tomato chromosome 10 encodes a glutamate dehydrogenase with NAD(P)+, NAD+ and NADP+ activities, and binds cofactors including zinc, copper and ATP. The gene is associated with glutamate homeostasis, breakdown and metabolism, as well as threonine metabolism, GABA transport and the GABA shunt, nitrogen utilization and fixation, and responses to nitrogen compounds, boron and basic pH. It has been linked to a wide range of agronomic traits including stay green, canopy temperature, leaf nitrogen content, specific leaf weight and area, fruit type, fructose content, root and shoot dry weight, nitrate and soluble protein content, chlorophyll a, amino acid and proline content, cadmium concentration, respiration rate, root number, stem diameter, leaf number, quantum yield, carotenoid and starch content, fruit shape and size, water use efficiency, and net photosynthetic rate. The protein localises to mitochondria, plastids, cytosol, vacuole and plasmalemma. Studies of related genes in other species connect the family to leaf chlorophyll content, senescence, oxidative stress and seedling growth.