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EC 1.3.99.40 Details
EC number
1.3.99.40
Accepted name
carotenoid χ-ring synthase
Reaction
carotenoid β-end group + 2 acceptor = carotenoid χ-end group + 2 reduced acceptor
Other name(s)
crtU (gene name) (ambiguous), cruE (gene name)
Systematic name
carotenoid β-ring:acceptor oxidoreductase/methyltranferase (χ-ring-forming)
Comment
The enzyme, found in purple sulfur bacteria (Chromatiaceae) and some cyanobacteria, is involved in the biosynthesis of carotenoids that contain χ-type end groups, such as okenone, renierapurpurin, and synechoxanthin.
History
created 2018
EC Tree
1.3.99.9 created 1976, deleted 2002