ID   1.14.15.9
DE   spheroidene monooxygenase.
AN   2-oxo-spirilloxanthin monooxygenase.
AN   acyclic carotenoid 2-ketolase.
AN   spirilloxanthin monooxygenase.
CA   (1) 4 H(+) + 2 O2 + 4 reduced [2Fe-2S]-[ferredoxin] + spheroidene = 3 H2O
CA   + 4 oxidized [2Fe-2S]-[ferredoxin] + spheroiden-2-one.
CA   (2) 4 H(+) + 2 O2 + 4 reduced [2Fe-2S]-[ferredoxin] + spirilloxanthin =
CA   2-oxospirilloxanthin + 3 H2O + 4 oxidized [2Fe-2S]-[ferredoxin].
CA   (3) 2-oxospirilloxanthin + 4 H(+) + 2 O2 + 4 reduced [2Fe-2S]-
CA   [ferredoxin] = 2,2'-dioxospirilloxanthin + 3 H2O + 4 oxidized [2Fe-2S]-
CA   [ferredoxin].
CC   -!- The enzyme is involved in spheroidenone biosynthesis and in
CC       2,2'-dioxospirilloxanthin biosynthesis.
CC   -!- The enzyme from Rhodobacter sphaeroides contains heme at its active
CC       site.
DR   P17055, CRTA_RHOCB ;
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