GS | glutathione synthase, GSH-S

Glutathione synthetase (GSH-S) catalyses the last step of glutathione (GSH) synthesis. GSH is synthesized in two ATP-dependent steps: in the first, gamma-glutamylcysteine (gamma-EC) is synthesized from L-glutamate and cysteine, catalyzed by gamma-glutamylcysteine synthetase (g-ECS); in the second step, catalysed by GSH-S, glycine is added to the C-terminal end of gamma-EC. GSH is the predominant non-protein thiol in all nearly where it acts as an antioxidant in stress responses and as a mobile pool of reduced sulfur. It is also important in the regulation of plant growth and development