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. 2022 Feb;27(1):37-47.
doi: 10.1007/s00775-021-01909-0. Epub 2021 Oct 29.

Mono- and dinuclear zinc complexes bearing identical bis(thiosemicarbazone) ligand that exhibit alkaline phosphatase-like catalytic reactivity

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Mono- and dinuclear zinc complexes bearing identical bis(thiosemicarbazone) ligand that exhibit alkaline phosphatase-like catalytic reactivity

Hyeri Jeon et al. J Biol Inorg Chem. 2022 Feb.

Abstract

Mono- and dinuclear zinc(II) complexes bearing bis(thiosemicarbazone) (bTSC) ligand were employed in the cleavage of phosphoester bonds. Comparative kinetic studies combined with theory suggested that the P-O bond cleavage is much accelerated by dinuclear zinc(II) complex in the presence of base. Based on the DFT-optimized structures of the proposed intermediates, it is plausible that (1) the removal of sulfur atoms of bTSC ligand from the zinc center provides two vacant sites for the binding of water (or hydroxide ion) and phosphoester and (2) the H-bonding between water (or hydroxide ion) and phosphoester, through several water molecules, may also assist the P-O bond cleavage and facilitate the nucleophilic attack. The kinetic and catalytic studies on the hydrolysis of phosphoester by dinuclear zinc complex showed a much-enhanced reactivity under basic reaction conditions, reaching over 95% conversion yield within 4 h. The currently presented compounds are arguably one of the faster synthetic Zn-based model performing phosphatase-like activity presented so far.

Keywords: Computational chemistry; Density functional theory; Enzyme kinetics; Hydrolysis; Model compound.

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References

    1. Kimura E (2000) Dimetallic hydrolases and their models. Curr Opin Chem Biol 4:207–213 - PubMed
    1. Weston J (2005) Mode of action of bi- and trinuclear zinc hydrolases and their synthetic analogues. Chem Rev 105:2151–2174 - PubMed
    1. Mitić N, Smith SJ, Neves A, Guddat LW, Ga-han LR, Schenk G, (2006) The catalytic mechanisms of binuclear metallohydrolases. Chem Rev 106:3338–3363
    1. Jonas S, Hollfelder F (2009) Mapping catalytic promiscuity in the alkaline phosphatase superfamily Stefanie Jonas and Florian Hollfelder. Pure Appl Chem 81:731–742
    1. Jarenmark M, Csapó E, Singh J, Wöckel S, Farkas E, Meyer F, Haukka M, Nordlander E (2010) Unsymmetrical dizinc complexes as models for the active sites of phosphohydrolases. Dalton Trans 39:8183–8194 - PubMed

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