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Your query returned 1 entry. Printable version
EC | 1.14.15.9 | ||||
Accepted name: | spheroidene monooxygenase | ||||
Reaction: | (1) spheroidene + 4 reduced ferredoxin [iron-sulfur] cluster + 2 O2 + 4 H+ = spheroiden-2-one + 4 oxidized ferredoxin [iron-sulfur] cluster + 3 H2O (overall reaction) (1a) spheroidene + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2-hydroxyspheroidene + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O (1b) 2-hydroxyspheroidene + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2,2-dihydroxyspheroidene + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O (1c) 2,2-dihydroxyspheroidene = spheroiden-2-one + H2O (spontaneous) (2) spirilloxanthin + 4 reduced ferredoxin [iron-sulfur] cluster + 2 O2 + 4 H+ = 2-oxospirilloxanthin + 4 oxidized ferredoxin [iron-sulfur] cluster + 3 H2O (overall reaction) (2a) spirilloxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2-hydroxyspirilloxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O (2b) 2-hydroxyspirilloxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2,2-dihydroxyspirilloxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O (2c) 2,2-dihydroxyspirilloxanthin = 2-oxospirilloxanthin + H2O (spontaneous) (3) 2-oxospirilloxanthin + 4 reduced ferredoxin [iron-sulfur] cluster + 2 O2 + 4 H+ = 2,2′-dioxospirilloxanthin + 4 oxidized ferredoxin [iron-sulfur] cluster + 3 H2O (overall reaction) (3a) 2-oxospirilloxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2′-hydroxy-2-oxospirilloxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O (3b) 2′-hydroxy-2-oxospirilloxanthin + reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = 2′,2′-dihydroxy-2-oxospirilloxanthin + oxidized ferredoxin [iron-sulfur] cluster + H2O (3c) 2′,2′-dihydroxy-2-oxospirilloxanthin = 2,2′-dioxospirilloxanthin + H2O (spontaneous) |
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For diagram of 2,2′-dioxospirilloxanthin biosynthesis, click here and for diagram of 4.2.1.131, click here | |||||
Glossary: | spheroidene = 3,4-didehydro-1-methoxy-1,2,7′,8′-tetrahydro-ψ,ψ-carotene | ||||
Other name(s): | CrtA; acyclic carotenoid 2-ketolase; spirilloxanthin monooxygenase; 2-oxo-spirilloxanthin monooxygenase | ||||
Systematic name: | spheroidene,reduced-ferredoxin:oxygen oxidoreductase (spheroiden-2-one-forming) | ||||
Comments: | The enzyme is involved in spheroidenone biosynthesis and in 2,2′-dioxospirilloxanthin biosynthesis. The enzyme from Rhodobacter sphaeroides contains heme at its active site [1]. | ||||
Links to other databases: | BRENDA, EXPASY, Gene, KEGG, MetaCyc | ||||
References: |
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