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Angew Chem Int Ed Engl. 2013 Sep 27;52(40):10529-32. doi: 10.1002/anie.201303877. Epub 2013 Aug 21.

The sixteenth iron in the nitrogenase MoFe protein.

Author information

1
Division of Chemistry and Chemical Engineering, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA 91125 (USA).

Abstract

Another iron in the fire: X-ray anomalous diffraction studies on the nitrogenase MoFe protein show the presence of a mononuclear iron site, designated as Fe16, which was previously identified as either Ca(2+) or Mg(2+). The position of the absorption edge indicates that this site is in the oxidation state +2. The high sequence conservation of the residues coordinated to Fe16 emphasizes the potential importance of the site in nitrogenase.

KEYWORDS:

iron; metalloproteins; multiple-wavelength anomalous diffraction; nitrogen fixation; nitrogenases

PMID:
23963815
PMCID:
PMC3891402
DOI:
10.1002/anie.201303877
[Indexed for MEDLINE]
Free PMC Article
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