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- Title
An Fe<sub>6</sub>C Core in All Nitrogenase Cofactors.
- Authors
Decamps, Laure; Rice, Derek B.; DeBeer, Serena
- Abstract
The biological process of dinitrogen reduction to ammonium occurs at the cofactors of nitrogenases, the only enzymes that catalyze this challenging chemical reaction. Three types of nitrogenases have been described, named according to the heterometal in their cofactor: molybdenum, vanadium or iron nitrogenases. Spectroscopic and structural characterization allowed the unambiguous identification of the cofactors of molybdenum and vanadium nitrogenases and revealed a central μ6‐carbide in both of them. Although genetic studies suggested that the cofactor of the iron nitrogenase contains a similar Fe6C core, this has not been experimentally demonstrated. Here we report Valence‐to‐Core X‐ray Emission Spectroscopy providing experimental evidence that this cofactor contains a carbide, thereby making the Fe6C core a feature of all nitrogenase cofactors.
- Subjects
X-ray emission spectroscopy; COFACTORS (Biochemistry); NITROGENASES; IRON; MOLYBDENUM enzymes; MOLYBDENUM
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 41, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202209190