1nf6

X-ray structure of the Desulfovibrio desulfuricans bacterioferritin: the diiron site in different catalytic states ("cycled" structure: reduced in solution and allowed to reoxidise before crystallisation)

spinqualitylabelsall models 1nf6, resolution 2.35Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1nf6 is a 16 chain structure with sequence from Desulfovibrio desulfuricans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FE, FEC, GOL, SO4 Related: 1nf4, 1nfv Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [BFR_DESDA] Iron-storage protein, whose ferroxidase center binds Fe(2+) ions, oxidizes them by dioxygen to Fe(3+), and participates in the subsequent Fe(3+) oxide mineral core formation within the central cavity of the protein complex. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The first crystal structure of a native di-iron center in an iron-storage protein (bacterio)ferritin is reported. The protein, isolated from the anaerobic bacterium Desulfovibrio desulfuricans, has the unique property of having Fe-coproporphyrin III as its heme cofactor. The three-dimensional structure of this bacterioferritin was determined in three distinct catalytic/redox states by X-ray crystallography (at 1.95, 2.05 and 2.35 A resolution), corresponding to different intermediates of the di-iron ferroxidase site. Conformational changes associated with these intermediates support the idea of a route for iron entry into the protein shell through a pore that passes through the di-iron center. Molecular surface and electrostatic potential calculations also suggest the presence of another ion channel, distant from the channels at the three- and four-fold axes proposed as points of entry for the iron atoms. The nature of the di-iron site in the bacterioferritin from Desulfovibrio desulfuricans.,Macedo S, Romao CV, Mitchell E, Matias PM, Liu MY, Xavier AV, LeGall J, Teixeira M, Lindley P, Carrondo MA Nat Struct Biol. 2003 Apr;10(4):285-90. PMID:12627224 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ferritin

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