ACC synthase

ACC synthase EC; systematic name: S-adenosyl-L-methionine methylthioadenosine lyase; an enzyme present in plant tissues that catalyses the pyridoxal phosphate-dependent conversion of Sadenosylmethionine to 1-aminocyclopropane-1-carboxylic acid (ACC) and 5′-methylthioadenosine. It has been cloned from various fruits – zucchini (courgette), tomato, apple – and has 48–97% sequence identity in different plants. Tomato contains several genes for the enzyme that are differentially regulated and expressed in response to wounding, ripening, or various stresses.

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