5fsd | pdb_00005fsd

1.75 A resolution 2,5-dihydroxybenzensulfonate inhibited Sporosarcina pasteurii urease

spinqualitylabelsall models 5fsd, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5fsd is a 3 chain structure with sequence from Sporosarcina pasteurii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: DBX, EDO, NI, OH, SO4 NonStd Res: CXM, KCX Related: 5fse Activity: Urease, with EC number 3.5.1.5 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Publication Abstract from PubMed The high activity of urease, a Ni(ii) enzyme, has several adverse effects on human health and agriculture, and its modulation needs the use of inhibitors. 1,4-Benzoquinone (BQ) irreversibly inactivates Sporosarcina pasteurii urease (SPU), with first order kinetics for both the inhibitor and the enzyme. This reaction is stoichiometrically quenched in the presence of sulphite. The 2.07 A crystal structure of SPU bound to BQ shows the presence of a 1,4-hydroquinone moiety covalently bound to the thiol group of alphaCys322, a key residue found on the mobile flap regulating the substrate access to the active site. The 1.75 A crystal structure obtained when sulphite is added to a solution of SPU previously incubated with BQ shows the presence of a 2,5-dihydroxy-benzenesulphonate moiety bound to the alphaCys322 thiol group. These data reveal how the active site cysteine reacts with a prototypical BQ moiety, found in a large number of natural substances potentially suitable to control the urease activity. Inactivation of urease by 1,4-benzoquinone: chemistry at the protein surface.,Mazzei L, Cianci M, Musiani F, Ciurli S Dalton Trans. 2016 Apr 7;45(13):5455-9. doi: 10.1039/c6dt00652c. Epub 2016 Mar, 10. PMID:26961812 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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