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[NiFe]-hydrogenase accessory proteins HypC and HypD form a complex that binds a Fe–(CN) 2 CO moiety and CO 2 . In this study two HypC homologues from Escherichia coli were purified under strictly anaerobic conditions and both contained sub-stoichiometric amounts of iron (approx. 0.3molFe/mol HypC). Infrared spectroscopic analysis identified a signature at 2337cm −1 indicating...
The HypC and HypD maturases are required for the biosynthesis of the Fe(CN) 2 CO cofactor in the large subunit of [NiFe]-hydrogenases. Using infrared spectroscopy we demonstrate that an anaerobically purified, Strep-tagged HypCD complex from Escherichia coli exhibits absorption bands characteristic of diatomic CO and CN − ligands as well as CO 2 . Metal and sulphide analyses...
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