Phycocyanobilin:ferredoxin oxidoreductase

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Phycocyanobilin:ferredoxin oxidoreductase complex with biliverdin IX-α (PDB entry 3ajg)

3D Structures of Phycocyanobilin:ferredoxin oxidoreductase

3ajg, 3i95 – SyPcyA (mutant) + biliverdin IX – Synechocystis
3ajh – SyPcyA (mutant) + biliverdin XIII
3i94 - SyPcyA + biliverdin XIII
3f0l, 3fom, 3nb8, 3nb9 – SyPcyA (mutant)
3i8u – SyPcyA + biliverdin derivative


  1. Tu SL, Gunn A, Toney MD, Britt RD, Lagarias JC. Biliverdin reduction by cyanobacterial phycocyanobilin:ferredoxin oxidoreductase (PcyA) proceeds via linear tetrapyrrole radical intermediates. J Am Chem Soc. 2004 Jul 21;126(28):8682-93. PMID:15250720 doi:
  2. Wada K, Hagiwara Y, Yutani Y, Fukuyama K. One residue substitution in PcyA leads to unexpected changes in tetrapyrrole substrate binding. Biochem Biophys Res Commun. 2010 Nov 12;402(2):373-7. Epub 2010 Oct 12. PMID:20946883 doi:10.1016/j.bbrc.2010.10.037

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