Accepted Name |
phycocyanobilin:ferredoxin oxidoreductase
|
Reaction catalysed |
(2R,3Z)-phycocyanobilin + 4 oxidized [2Fe-2S]-[ferredoxin] <=> biliverdin IXalpha + 4 H(+) + 4 reduced [2Fe-2S]-[ferredoxin] |
Comment(s) |
- Catalyzes the four-electron reduction of biliverdin IXalpha
(2-electron reduction at both the A and D rings).
- Reaction proceeds via an isolatable 2-electron intermediate,
18(1),18(2)-dihydrobiliverdin.
- Flavodoxins can be used instead of ferredoxin.
- The direct conversion of biliverdin IXalpha (BV) to (3Z)-
phycocyanobilin (PCB) in the cyanobacteria Synechocystis sp.
PCC 6803, Anabaena sp. PCC7120 and Nostoc punctiforme is in contrast
to the proposed pathways of PCB biosynthesis in the red alga
Cyanidium caldarium, which involves (3Z)-phycoerythrobilin (PEB) as
an intermediate and in the green alga Mesotaenium caldariorum,
in which PCB is an isolable intermediate.
|
Cross-references |
BRENDA | 1.3.7.5 |
EC2PDB | 1.3.7.5 |
ExplorEnz | 1.3.7.5 |
PRIAM enzyme-specific profiles | 1.3.7.5 |
KEGG Ligand Database for Enzyme Nomenclature | 1.3.7.5 |
IUBMB Enzyme Nomenclature | 1.3.7.5 |
IntEnz | 1.3.7.5 |
MEDLINE | Find literature relating to 1.3.7.5 |
MetaCyc | 1.3.7.5 |
Rhea expert-curated reactions | 1.3.7.5 |
UniProtKB/Swiss-Prot |
B1X018, PCYA_CROS5 | B7KJQ2, PCYA_GLOC7 | Q7NHE8, PCYA_GLOVI |
B0JPG5, PCYA_MICAN | Q93TM9, PCYA_NOSP7 | Q93TN0, PCYA_NOSS1 |
Q7U7A1, PCYA_PARMW | A3PCF5, PCYA_PROM0 | A8G4C5, PCYA_PROM2 |
A2CA92, PCYA_PROM3 | A2BW83, PCYA_PROM5 | Q31BD0, PCYA_PROM9 |
Q7VCC2, PCYA_PROMA | Q7V7Y8, PCYA_PROMM | Q93TL5, PCYA_PROMP |
A2BQN3, PCYA_PROMS | B7JWS2, PCYA_RIPO1 | Q8KPS9, PCYA_SYNE7 |
Q5N5A3, PCYA_SYNP6 | Q3AXI3, PCYA_SYNS9 | Q3AKB1, PCYA_SYNSC |
Q55891, PCYA_SYNY3 | P59288, PCYA_THEVB | Q10X61, PCYA_TRIEI |
Q3M745, PCYA_TRIV2 |
|
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