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Substance Name: Spermidine Synthase
RN: 37277-82-0


  • An enzyme that catalyzes 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 kDa and is composed of two subunits of equal size.
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Names and Synonyms

Name of Substance

  • Spermidine Synthase

MeSH Heading

  • Spermidine Synthase


  • Aminopropyltransferase
  • Aminopropyltransferase, Putrescine
  • Propylamine Transferase
  • Putrescine Aminopropyltransferase
  • Spermidine Synthetase
  • Synthase, Spermidine
  • Synthetase, Spermidine
  • Transferase, Propylamine

Systematic Name

  • S-Adenosylmethioninamine:putrescine 3-aminopropyltransferase

Registry Numbers

CAS Registry Number

  • 37277-82-0

System Generated Number

  • 0037277820