Vanadium(v) is reduced by the ‘as isolated’ nitrogenase Fe-protein at neutral pH
Literature Information
Karl Fisher, David J. Lowe, Jan Petersen
Orthovanadate has been investigated in the presence of the nitrogenase Fe-protein. Electron paramagnetic resonance (EPR) spectra demonstrate that vanadium(V) is reduced by the reduced Fe-protein to vanadium(IV) which then probably binds to the nucleotide binding site in place of the Mg2+ which is normally present. In contrast, the oxidized Fe-protein is unable to reduce vanadate. In this case vanadate has potential for use as a phosphate analogue where it acts as transition state mimic for hydrolysis.
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