spermidine synthasemedical dictionary

<enzyme>

<cell biology> 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)