Phycocyanobilin:ferredoxin oxidoreductase
In enzymology, a phycocyanobilin:ferredoxin oxidoreductase (PcyA, EC 1.3.7.5) is an enzyme that catalyzes the chemical reaction
- (3Z)-phycocyanobilin + oxidized ferredoxin biliverdin IXalpha + reduced ferredoxin
phycocyanobilin:ferredoxin oxidoreductase | |||||||||
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Identifiers | |||||||||
EC no. | 1.3.7.5 | ||||||||
CAS no. | 347401-12-1 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / QuickGO | ||||||||
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Thus, the two substrates of this enzyme are (3Z)-phycocyanobilin and oxidized ferredoxin, whereas its two products are biliverdin IXalpha and reduced ferredoxin.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with an iron-sulfur protein as acceptor. The systematic name of this enzyme class is (3Z)-phycocyanobilin:ferredoxin oxidoreductase. This enzyme participates in porphyrin and chlorophyll metabolism.
Structural studies
As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 2D1E, 2DKE, and 2G18.
References
- Frankenberg N, Mukougawa K, Kohchi T, Lagarias JC (2001). "Functional genomic analysis of the HY2 family of ferredoxin-dependent bilin reductases from oxygenic photosynthetic organisms". Plant Cell. 13 (4): 965–78. doi:10.1105/tpc.13.4.965. PMC 135530. PMID 11283349.
- Beale SI (1993). "Biosynthesis of phycobilins". Chem. Rev. 93 (2): 785–802. doi:10.1021/cr00018a008.
- Wu SH, McDowell MT, Lagarias JC (1997). "Phycocyanobilin is the natural precursor of the phytochrome chromophore in the green alga Mesotaenium caldariorum". J. Biol. Chem. 272 (41): 25700–5. doi:10.1074/jbc.272.41.25700. PMID 9325294.
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