, Volume 12, Issue 4, pp 429-442
Date: 21 Feb 2007

Crystallographic evidence for dioxygen interactions with iron proteins

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The interaction of dioxygen with iron plays a key role in many important biological processes, such as dioxygen transport in the bloodstream and the reduction of dioxygen by iron in respiration. However, the catalytic mechanisms employed, for example in ligand oxidation, are not fully understood at the current time despite intensive biochemical, spectroscopic and structural studies. This review outlines the structural evidence obtained by X-ray crystallographic methods for the nature of the interactions between dioxygen and the metal in iron-containing proteins. Proteins involved in iron transport or electron transfer are not included.