ID   1.3.99.37
DE   1-hydroxy-2-isopentenylcarotenoid 3,4-desaturase.
CA   (1) A + dihydroisopentenyldehydrorhodopin = AH2 +
CA   isopentenyldehydrorhodopin.
CA   (2) A + dihydrobisanhydrobacterioruberin = AH2 +
CA   bisanhydrobacterioruberin.
CC   -!- The enzyme, isolated from the archaeon Haloarcula japonica,
CC       is involved in the biosynthesis of the C50 carotenoid
CC       bacterioruberin.
CC   -!- In this pathway it catalyzes the desaturation of the C-3,4 double
CC       bond in dihydroisopentenyldehydrorhodopin and the desaturation of the
CC       C-3'-4' double bond in dihydrobisanhydrobacterioruberin.
DR   A0A0A1GKA2, CRTD_HALJT ;
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