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A nucleotide-copper(II) complex possessing a monooxygenase-like catalytic function.

Haifeng Wu1, Shichao Xu1, Peidong Du1

  • 1State Key Laboratory of Organic-Inorganic Composites, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China. wangzg@mail.buct.edu.cn.

Journal of Materials Chemistry. B
|July 6, 2023
PubMed
Summary
This summary is machine-generated.

We developed a novel nucleotide-copper complex that mimics enzyme activity, catalyzing specific hydroxylation reactions. This artificial catalyst shows enhanced thermal stability compared to natural enzymes.

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Area of Science:

  • Bioinorganic Chemistry
  • Catalysis
  • Enzyme Mimicry

Background:

  • Designing artificial biocatalysts with enzyme-like functions is a significant challenge in chemistry.
  • Minimalist monooxygenases catalyze hydroxylation reactions, but their design is complex.

Purpose of the Study:

  • To create a novel nucleotide-copper complex for artificial biocatalysis.
  • To investigate its catalytic activity in ortho-hydroxylation reactions.
  • To explore its potential as an oxidase-mimetic catalyst.

Main Methods:

  • One-pot synthesis of a nucleotide-Cu2+ complex.
  • Experimental and theoretical studies to elucidate the catalytic mechanism.
  • Investigation of substrate (tyramine) and hydrogen peroxide (H2O2) interactions.
  • Assessment of catalytic properties across a temperature range (25°C–75°C).

Main Results:

  • The nucleotide-Cu2+ complex effectively catalyzes ortho-hydroxylation of tyramine.
  • A ternary-complex intermediate involving the catalyst, H2O2, and tyramine was identified.
  • The single copper center mimics the function of natural dicopper sites in catalysis.
  • The artificial catalyst exhibits thermophilic properties, remaining active up to 75°C, unlike native enzymes deactivated above 35°C.

Conclusions:

  • The developed nucleotide-Cu2+ complex serves as a functional artificial biocatalyst for hydroxylation.
  • This work provides insights into designing primitive metallocentre-dependent enzymes and oxidase-mimetic catalysts.
  • The catalyst's enhanced thermal stability offers advantages over native enzymes.