3mzb

X-ray structure of NikA in complex with the doubly hydroxylated iron complex, 1-O2

spinqualitylabelsall models 3mzb, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3mzb is a 2 chain structure with sequence from Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.7Å Ligands: ACT, BHR, CL, DTD, FE, GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NIKA_ECOLI Involved in a nickel transport system, probably represents the nickel binder. Publication Abstract from PubMed Chemical reactions inside single crystals are quite rare because crystallinity is difficult to retain owing to atomic rearrangements. Protein crystals in general have a high solvent content. This allows for some molecular flexibility, which makes it possible to trap reaction intermediates of enzymatic reactions without disrupting the crystal lattice. A similar approach has not yet been fully implemented in the field of inorganic chemistry. Here, we have combined model chemistry and protein X-ray crystallography to study the intramolecular aromatic dihydroxylation by an arene-containing protein-bound iron complex. The bound complex was able to activate dioxygen in the presence of a reductant, leading to the formation of catechol as the sole product. The structure determination of four of the catalytic cycle intermediates and the end product showed that the hydroxylation reaction implicates an iron peroxo, generated by reductive O(2) activation, an intermediate already observed in iron monooxygenases. This strategy also provided unexpected mechanistic details such as the rearrangement of the iron coordination sphere on metal reduction. Crystallographic snapshots of the reaction of aromatic C-H with O(2) catalysed by a protein-bound iron complex.,Cavazza C, Bochot C, Rousselot-Pailley P, Carpentier P, Cherrier MV, Martin L, Marchi-Delapierre C, Fontecilla-Camps JC, Menage S Nat Chem. 2010 Dec;2(12):1069-76. Epub 2010 Oct 10. PMID:21107372 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also ABC transporter 3D structures

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