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Information on EC 1.3.99.40 - carotenoid chi-ring synthase for references in articles please use BRENDA:EC1.3.99.40
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EC Tree
The enzyme appears in viruses and cellular organisms
Synonyms
crtU, cruE,
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crtU
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ambiguous
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cruE
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gene name
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carotenoid beta-end group + 2 acceptor = carotenoid chi-end group + 2 reduced acceptor
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carotenoid beta-ring:acceptor oxidoreductase/methyltranferase (chi-ring forming)
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beta,chi-carotene + 2 acceptor
renierapurpurin + 2 reduced acceptor
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beta-carotene + 2 acceptor
beta,chi-carotene + 2 reduced acceptor
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carotene with beta-end group + 2 acceptor
carotene with chi-end group + 2 reduced acceptor
carotene with beta-end group + 2 acceptor
carotene with chi-end group + 2 reduced acceptor
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carotene with beta-end group + 2 acceptor
carotene with chi-end group + 2 reduced acceptor
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beta,chi-carotene + 2 acceptor
renierapurpurin + 2 reduced acceptor
A5A547
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beta-carotene + 2 acceptor
beta,chi-carotene + 2 reduced acceptor
A5A547
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UniProt
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UniProt
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UniProt
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physiological function
in Thiodictyon sp., lycopene cyclase CrtY produces gamma-carotene as the only product. gamma-Carotene desaturase methyltransferase CrtU produces carotenoids with chi-rings which are further transformed to final product okenone
physiological function
a gene disruption mutant does not produce detectable synechoxanthin, but has otherwise essentially normal carotenoid contents. Growth rate under standard conditions is identical to wild-type
physiological function
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in Thiodictyon sp., lycopene cyclase CrtY produces gamma-carotene as the only product. gamma-Carotene desaturase methyltransferase CrtU produces carotenoids with chi-rings which are further transformed to final product okenone
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A5A547_SYNP2
Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6)
645
0
71954
TrEMBL
G3G009_9GAMM
634
0
69449
TrEMBL
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Vogl, K.; Bryant, D.
Biosynthesis of the biomarker okenone chi-ring formation
Geobiology
10
205-215
2012
Candidatus Thiodictyon syntrophicum (G3G009), Candidatus Thiodictyon syntrophicum Cad16 (G3G009)
brenda
Graham, J.; Bryant, D.
The biosynthetic pathway for synechoxanthin, an aromatic carotenoid synthesized by the euryhaline, unicellular cyanobacterium Synechococcus sp. strain PCC 7002
J. Bacteriol.
190
7966-7974
2008
Synechococcus sp. PCC 7002 (A5A547)
brenda
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1.3.99.40 carotenoid chi-ring synthase
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