The sixteenth iron in the nitrogenase MoFe protein.

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.

SUBMITTER: Zhang L 

PROVIDER: S-EPMC3891402 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature