EC - 1-hydroxy-2-isopentenylcarotenoid 3,4-desaturase

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IntEnz Enzyme Nomenclature


Accepted name:
1-hydroxy-2-isopentenylcarotenoid 3,4-desaturase
Other name:
crtD (gene name)
Systematic name:
dihydroisopentenyldehydrorhodopin:acceptor 3,4-oxidoreductase



The enzyme, isolated from the archaeon Haloarcula japonica, is involved in the biosynthesis of the C50 carotenoid bacterioruberin. In this pathway it catalyses the desaturation of the C-3,4 double bond in dihydroisopentenyldehydrorhodopin and the desaturation of the C-3'-4' double bond in dihydrobisanhydrobacterioruberin.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB


  1. Yang, Y., Yatsunami, R., Ando, A., Miyoko, N., Fukui, T., Takaichi, S., Nakamura, S.
    Complete biosynthetic pathway of the C50 carotenoid bacterioruberin from lycopene in the extremely halophilic archaeon Haloarcula japonica.
    J. Bacteriol. 197 : 1614-1623 (2015). [PMID: 25712483]

[EC created 2015]