产品内容
本酶催化的反应为(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);;系统名称为Spheroidene,reduced-Ferredoxin:oxygen Oxidoreductase (Spheroiden-2-One-Forming)，该酶参与球酮菌素的生物合成以及 2,2'-二氧螺旋菌黄质的生物合成。来自类球红细菌 Rhodobacter sphaeroides 的酶其活性位点含血红素 [1]。
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