Discadenine synthase () is an enzyme characterised from Dictyostelium discoideum that catalyzes a chemical reaction which converts N6-isopentenyladenine to discadenine. It transfers the 3-amino-3-carboxypropyl group from the coenzyme, S-adenosyl methionine, giving 5'-methylthioadenosine as a byproduct.
The product discadenine inhibits spore germination in this soil-dwelling amoeba.
This enzyme is a transferase, specifically those transferring aryl or alkyl groups other than methyl groups. The systematic name of this enzyme class is S-adenosyl-L-methionine:N6-(Delta2-isopentenyl)-adenine 3-(3-amino-3-carboxypropyl)-transferase. Other names in common use include discadenine synthetase, S-adenosyl-L-methionine:6-N-(Delta2-isopentenyl)-adenine, and 3-(3-amino-3-carboxypropyl)-transferase.
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