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• W1940696028 endingPage "99" @default.
• W1940696028 startingPage "96" @default.
• W1940696028 abstract "Nitrogenases are the enzymes by which certain microorganisms convert atmospheric dinitrogen (N2) to ammonia, thereby providing essential nitrogen atoms for higher organisms. The most common nitrogenases reduce atmospheric N2 at the FeMo cofactor, a sulfur-rich iron-molybdenum cluster (FeMoco). The central iron sites that are coordinated to sulfur and carbon atoms in FeMoco have been proposed to be the substrate binding sites, on the basis of kinetic and spectroscopic studies. In the resting state, the central iron sites each have bonds to three sulfur atoms and one carbon atom. Addition of electrons to the resting state causes the FeMoco to react with N2, but the geometry and bonding environment of N2-bound species remain unknown. Here we describe a synthetic complex with a sulfur-rich coordination sphere that, upon reduction, breaks an Fe-S bond and binds N2. The product is the first synthetic Fe-N2 complex in which iron has bonds to sulfur and carbon atoms, providing a model for N2 coordination in the FeMoco. Our results demonstrate that breaking an Fe-S bond is a chemically reasonable route to N2 binding in the FeMoco, and show structural and spectroscopic details for weakened N2 on a sulfur-rich iron site." @default.
• W1940696028 created "2016-06-24" @default.
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• W1940696028 date "2015-09-23" @default.
• W1940696028 modified "2023-10-10" @default.
• W1940696028 title "Binding of dinitrogen to an iron–sulfur–carbon site" @default.
• W1940696028 cites W1986546695 @default.
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• W1940696028 doi "https://doi.org/10.1038/nature15246" @default.
• W1940696028 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4592811" @default.
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