A possible iron delivery function of the dinuclear iron center of HcgD in 
[Fe]-hydrogenase cofactor biosynthesis

Fujishiro, Takashi; Ermler, Ulrich; Shima, Seigo

doi:10.1016/j.febslet.2014.05.059

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A possible iron delivery function of the dinuclear iron center of HcgD in [Fe]-hydrogenase cofactor biosynthesis

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Fujishiro, Takashi
Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043 Marburg, Germany, Max Planck Society;

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Ermler, Ulrich
Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Max Planck Society;

Shima, Seigo
Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043 Marburg, Germany, Max Planck Society;
PRESTO, Japan Science and Technology Agency (JST), Honcho, Kawaguchi, Saitama 332-0012, Japan;

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Citation

Fujishiro, T., Ermler, U., & Shima, S. (2014). A possible iron delivery function of the dinuclear iron center of HcgD in [Fe]-hydrogenase cofactor biosynthesis. FEBS Letters, 588(17), 2789-2793. doi:10.1016/j.febslet.2014.05.059.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0026-B1A1-C

Abstract

HcgD, a homolog of the ubiquitous Nif3-like protein family, is found in a gene cluster involved in the biosynthesis of the iron-guanylylpyridinol (FeGP) cofactor of [Fe]-hydrogenase. The presented crystal structure and biochemical analyses indicated that HcgD has a dinuclear iron-center, which provides a pronounced binding site for anionic ligands. HcgD contains a stronger and a weaker bound iron; the latter being removable by chelating reagents preferentially in the oxidized state. Therefore, we propose HcgD as an iron chaperone in FeGP cofactor biosynthesis, which might also stimulate investigations on the functionally unknown but physiologically important eukaryotic Nif3-like protein family members.