Spermidine synthase
Definition:
EC Tree > 2 Transferases > 2.5 Transferring alkyl or aryl groups, other than methyl groups > 2.5.1 Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date) > 2.5.1.16 spermidine synthase
Spermidine synthase is a polyamine-biosynthesis aminopropyltransferase. It transfers the 3-aminopropyl group from S-adenosyl 3-(methylsulfanyl)propylamine (decarboxylated S-adenosylmethionine) onto putrescine, releasing S-methyl-5'-thioadenosine and forming spermidine. Plant (Glycine max) and mammalian enzymes are highly specific for putrescine, while E. coli and Thermotoga maritima enzymes tolerate other acceptors such as spermidine and cadaverine. It occurs in Eukaryota, Bacteria and Archaea (cf. EC 2.5.1.22 and EC 2.5.1.23).
Spermidine synthase is a polyamine-biosynthesis aminopropyltransferase. It transfers the 3-aminopropyl group from S-adenosyl 3-(methylsulfanyl)propylamine (decarboxylated S-adenosylmethionine) onto putrescine, releasing S-methyl-5'-thioadenosine and forming spermidine. Plant (Glycine max) and mammalian enzymes are highly specific for putrescine, while E. coli and Thermotoga maritima enzymes tolerate other acceptors such as spermidine and cadaverine. It occurs in Eukaryota, Bacteria and Archaea (cf. EC 2.5.1.22 and EC 2.5.1.23).
References:
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