1oep

Structure of Trypanosoma brucei enolase reveals the inhibitory divalent metal site

spinqualitylabelsall models 1oep, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1oep is a 1 chain structure with sequence from Trybb. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: EDO, SO4, ZN Activity: Phosphopyruvate hydratase, with EC number 4.2.1.11 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 glycolytic enzymes of the trypanosomatids, that cause a variety of medically and agriculturally important diseases, are validated targets for drug design. Design of species-specific inhibitors is facilitated by the availability of structural data. Irreversible inhibitors, that bound covalently to the parasite enzyme alone, would be potentially particularly effective. Here we determine the crystal structure of enolase from Trypanosoma brucei and show that two cysteine residues, located in a water-filled cavity near the active-site, are modified by iodoacetamide leading to loss of catalytic activity. Since these residues are specific to the Trypanosomatidae lineage, this finding opens the way for the development of parasite-specific, irreversibly binding enolase inhibitors. In the present structure, the catalytic site is partially occupied by sulphate and two zinc ions. Surprisingly, one of these zinc ions illustrates the existence of a novel enolase-binding site for divalent metals. Evidence suggests that this is the first direct visualization of the elusive inhibitory metal site, whose existence has hitherto only been inferred from kinetic data. The crystal structure of Trypanosoma brucei enolase: visualisation of the inhibitory metal binding site III and potential as target for selective, irreversible inhibition.,da Silva Giotto MT, Hannaert V, Vertommen D, de A S Navarro MV, Rider MH, Michels PA, Garratt RC, Rigden DJ J Mol Biol. 2003 Aug 15;331(3):653-65. PMID:12899835 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Enolase 3D structures

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