2eff | pdb_00002eff

Crystal structure analysis of the complex between CyaY and Co(II)

spinqualitylabelsall models 2eff, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2eff is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CO Related: 1ew4, 1soy Gene: CYAY, B3807 (Escherichia coli) Resources: FirstGlance, OCA, RCSB, PDBsum 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 Deficiency of the small mitochondrial protein frataxin causes Friedreich's ataxia, a severe neurodegenerative pathology. Frataxin, which has been highly conserved throughout evolution, is thought to be involved in, among other processes, Fe-S cluster formation. Independent evidence shows that it binds iron directly, although with very distinct features and low affinity. Here, we have carried out an extensive study of the binding properties of CyaY, the bacterial ortholog of frataxin, to different divalent and trivalent cations, using NMR and X-ray crystallography. We demonstrate that the protein has low cation specificity and contains multiple binding sites able to chelate divalent and trivalent metals with low affinity. Binding does not involve cavities or pockets, but exposed glutamates and aspartates, which are residues that are unusual for iron chelation when not assisted by histidines and/or cysteines. We have related how such an ability to bind cations on a relatively large area through an electrostatic mechanism could be a valuable asset for protein function. Understanding the binding properties of an unusual metal-binding protein--a study of bacterial frataxin.,Pastore C, Franzese M, Sica F, Temussi P, Pastore A FEBS J. 2007 Aug;274(16):4199-210. Epub 2007 Jul 25. PMID:17651435 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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