EC - Psoralen synthase

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IntEnz Enzyme Nomenclature


Accepted name:
psoralen synthase
Other name:
Systematic name:
(+)-marmesin,[reduced NADPH—hemoprotein reductase]:oxygen oxidoreductase



This microsomal cytochrome P450 (heme-thiolate) enzyme is rather specific for (+)-marmesin, although it can also accept 5-hydroxymarmesin to a much lesser extent. Furanocoumarins protect plants from fungal invasion and herbivore attack. (+)-columbianetin, the angular furanocoumarin analogue of the linear furanocoumarin (+)-marmesin, acts as a competitive inhibitor even though it is not a substrate. Formerly EC

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Protein domains and families: PROSITE:PDOC00081
Structural data: CSA , EC2PDB
Gene Ontology: GO:0102876


  1. Larbat, R., Kellner, S., Specker, S., Hehn, A., Gontier, E., Hans, J., Bourgaud, F. and Matern, U.
    Molecular cloning and functional characterization of psoralen synthase, the first committed monooxygenase of furanocoumarin biosynthesis.
    J. Biol. Chem. 282: 542-554 (2007). [PMID: 17068340]

[EC created 2007 as EC, transferred 2018 to EC]