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    A structural and catalytic model for zinc phosphoesterases


    Buchholz, Rebecca R. and Etienne, Morgan E. and Dorgelo, Anneke and Mirams, Ruth E. and Smith, Sarah J. and Chow, Shiao Yun and Hanton, Lyall R. and Jameson, Geoffrey B. and Schenk, Gerhard and Gahan, Lawrence R. (2008) A structural and catalytic model for zinc phosphoesterases. Dalton Transactions, 43. pp. 6045-6054. ISSN 1477-9226

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    Abstract

    A structural model for the active site of phosphoesterases, enzymes that degrade organophosphate neurotoxins, has been synthesised. The ligand 2-((2-hydroxy-3-(((2-hydroxyethyl)(pyridin-2-ylmethyl)amino)methyl)-5-methylbenzyl)(pyridin-2-ylmethyl)amino)acetic acid (H(3)L1) and two Zn(ii) complexes have been prepared and characterised as and The ligand (H(3)L1) and complex were characterised through (1)H NMR, (13)C NMR, mass spectroscopy and microanalysis. The X-ray crystal structure of revealed a tetramer of dinuclear complexes, bridged by two phosphate molecules and bifurcating acetic acid arms. Functional studies of the zinc complex with the substrate bis(4-nitrophenyl)phosphate (bNPP) determined the complex with HL1(2-) to be a competent catalyst with k(cat) = 1.26 0.06 x 10(-6) s(-1).

    Item Type: Article
    Keywords: zinc phosphoesterases;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 3691
    Depositing User: Gary Schenk
    Date Deposited: 29 May 2012 08:36
    Journal or Publication Title: Dalton Transactions
    Publisher: Royal Society of Chemistry
    Refereed: Yes
    URI:

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