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Revealing the Absolute Configuration of the CO and CN- Ligands at the Active Site of a [NiFe] Hydrogenase
Zitatschlüssel ISI:000312038200016
Autor Rippers, Yvonne and Horch, Marius and Hildebrandt, Peter and Zebger, Ingo and Mroginski, Maria Andrea
Seiten 3852-3856
Jahr 2012
ISSN 1439-4235
DOI 10.1002/cphc.201200562
Adresse BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
Journal CHEMPHYSCHEM
Jahrgang 13
Nummer 17
Monat DEC 7
Verlag WILEY-V C H VERLAG GMBH
Zusammenfassung Combined molecular dynamics (MD) and quantum mechanical/molecular mechanical (QM/MM) calculations were performed on the crystal structure of the reduced membrane-bound [NiFe] hydrogenase (MBH) from Ralstonia eutropha to determine the absolute configuration of the CO and the two CN- ligands bound to the active-site iron of the enzyme. For three models that include the CO ligand at different positions, often indistinguishable on the basis of the crystallographic data, we optimized the structures and calculated the ligand stretching frequencies. Comparison with the experimental IR data reveals that the CO ligand is in trans position to the substrate-binding site of the bimetallic [NiFe] cluster.
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