Spermine Synthase

**Definition:** An enzyme that catalyzes the transfer of the propylamine moiety from 5'-deoxy-5'-S-(3-methylthiopropylamine)sulfonium adenosine to spermidine in the biosynthesis of spermine. It has an acidic isoelectric point at pH 5.0. EC 2.5.1.22.

**Tree numbers:** - D08.811.913.225.912

**Synonyms:** - Spermidine Aminopropyltransferase - Spermine Synthetase