The Enzyme Database

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EC 1.3.99.37     
Accepted name: 1-hydroxy-2-isopentenylcarotenoid 3,4-desaturase
Reaction: (1) dihydroisopentenyldehydrorhodopin + acceptor = isopentenyldehydrorhodopin + reduced acceptor
(2) dihydrobisanhydrobacterioruberin + acceptor = bisanhydrobacterioruberin + reduced acceptor
For diagram of bacterioruberin biosynthesis, click here
Glossary: bisanhydrobacterioruberin = (2S,2S′)-2,2′-bis(3-methylbut-2-en-1-yl)-3,4-didehydro-1,1′,2,2′-tetrahydro-ψ,ψ-carotene-1,1′-diol
dihydrobisanhydrobacterioruberin = (2S,2S′)-2,2′-bis(3-methylbut-2-en-1-yl)-3,3′,4,4′-tetradehydro-1,1′,2,2′-tetrahydro-ψ,ψ-carotene-1,1′-diol
dihydroisopentenyldehydrorhodopin = (2S)-2-(3-methylbut-2-en-1-yl)-3,4-didehydro-1,2-dihydro-ψ,ψ-caroten-1-ol
isopentenyldehydrorhodopin = (2S)-2-(3-methylbut-2-en-1-yl)-1,2-dihydro-ψ,ψ-caroten-1-ol
Other name(s): crtD (gene name)
Systematic name: dihydroisopentenyldehydrorhodopin:acceptor 3,4-oxidoreductase
Comments: 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: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Yang, Y., Yatsunami, R., Ando, A., Miyoko, N., Fukui, T., Takaichi, S. and Nakamura, S. Complete biosynthetic pathway of the C50 carotenoid bacterioruberin from lycopene in the extremely halophilic archaeon Haloarcula japonica. J. Bacteriol. 197 (2015) 1614–1623. [DOI] [PMID: 25712483]
[EC 1.3.99.37 created 2015]
 
 


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