Download MendeleyThe crystal structure of C176A mutated [Fe]-hydrogenase suggests an acyl-iron ligation in the active site iron complex.
Hiromoto, T., Ataka, K., Pilak, O., Vogt, S., Stagni, M.S., Meyer-Klaucke, W., Warkentin, E., Thauer, R.K., Shima, S., Ermler, U.(2009) FEBS Lett 583: 585-590
- PubMed: 19162018
- DOI: https://doi.org/10.1016/j.febslet.2009.01.017
- Primary Citation of Related Structures:
3F46, 3F47 - PubMed Abstract:
[Fe]-hydrogenase is one of three types of enzymes known to activate H(2). Crystal structure analysis recently revealed that its active site iron is ligated square-pyramidally by Cys176-sulfur, two CO, an "unknown" ligand and the sp(2)-hybridized nitrogen of a unique iron-guanylylpyridinol-cofactor. We report here on the structure of the C176A mutated enzyme crystallized in the presence of dithiothreitol (DTT). It suggests an iron center octahedrally coordinated by one DTT-sulfur and one DTT-oxygen, two CO, the 2-pyridinol's nitrogen and the 2-pyridinol's 6-formylmethyl group in an acyl-iron ligation. This result led to a re-interpretation of the iron ligation in the wild-type.
Organizational Affiliation:
Max-Planck-Institut für Terrestrische Mikrobiologie, Marburg, Germany.
