Carbon monoxide is often described as a competitive inhibitor of FeFe hydrogenases, and it is used for probing H2 binding to synthetic or in silico models of the active site H-cluster. Yet it does not always behave as a simple inhibitor. Using an original approach which combines accurate electrochemical measurements and theoretical calculations, we elucidate the mechanism by which, under certain conditions, CO binding can cause permanent damage to the H-cluster. Like in the case of oxygen inhibition, the reaction with CO engages the entire H-cluster, rather than only the Fe2 subsite.

Baffert, C., Bertini, L., Lautier, T., Greco, C., Sybirna, K., Ezanno, P., et al. (2011). CO Disrupts the Reduced H-Cluster of FeFe Hydrogenase. A Combined DFT and Protein Film Voltammetry Study. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133(7), 2096-2099 [10.1021/ja110627b].

CO Disrupts the Reduced H-Cluster of FeFe Hydrogenase. A Combined DFT and Protein Film Voltammetry Study

BERTINI, LUCA;GRECO, CLAUDIO;DE GIOIA, LUCA
;
2011

Abstract

Carbon monoxide is often described as a competitive inhibitor of FeFe hydrogenases, and it is used for probing H2 binding to synthetic or in silico models of the active site H-cluster. Yet it does not always behave as a simple inhibitor. Using an original approach which combines accurate electrochemical measurements and theoretical calculations, we elucidate the mechanism by which, under certain conditions, CO binding can cause permanent damage to the H-cluster. Like in the case of oxygen inhibition, the reaction with CO engages the entire H-cluster, rather than only the Fe2 subsite.
Articolo in rivista - Articolo scientifico
Iron-hydrogenasis; Electrochemistry; Density Functional theory; Protein Film Voltammetry; CO binding
English
2011
133
7
2096
2099
none
Baffert, C., Bertini, L., Lautier, T., Greco, C., Sybirna, K., Ezanno, P., et al. (2011). CO Disrupts the Reduced H-Cluster of FeFe Hydrogenase. A Combined DFT and Protein Film Voltammetry Study. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133(7), 2096-2099 [10.1021/ja110627b].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/23810
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