Medical Definition of Spermidine synthase
1.
An enzyme that catalyses the transfer of the propylamine moiety from 5'-deoxy-5'-s-(3-methylthiopropylamine)sulfonium adenosine to putrescine in the biosynthesis of spermidine. The enzyme has a molecular weight of approximately 73,000 kD and is composed of two subunits of equal size.
Chemical name: S-Adenosylmethioninamine:putrescine 3-aminopropyltransferase
Registry number: EC 2.5.1.16
(12 Dec 1998)
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