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Information on EC - lycopene elongase/hydratase (dihydrobisanhydrobacterioruberin-forming)

for references in articles please use BRENDA:EC2.5.1.150
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IUBMB Comments
The enzyme, characterized from the bacterium Dietzia sp. CQ4 and the halophilic archaea Halobacterium salinarum and Haloarcula japonica, is bifunctional. It catalyses the elongation of the C40 carotenoid all-trans-lycopene by attaching an isoprene unit at C-2 as well as the hydroxylation of the previous end of the molecule. The enzyme acts at both ends of the substrate, and combined with the action of EC, 1-hydroxy-2-isopentenylcarotenoid 3,4-desaturase, it forms the C50 carotenoid dihydrobisanhydrobacterioruberin. cf. EC, lycopene elongase/hydratase (flavuxanthin-forming).
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The expected taxonomic range for this enzyme is: Bacteria, Archaea
c0506, lbtA, lycopene elongase/1,2-hydratase, lyeJ, more
dimethylallyl diphosphate + all-trans-lycopene + H2O = dihydroisopentenyldehydrorhodopin + diphosphate
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dimethylallyl diphosphate + isopentenyldehydrorhodopin + H2O = dihydrobisanhydrobacterioruberin + diphosphate
show the reaction diagram
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