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RESEARCH PRODUCT

A Thermophilic Tetramolecular G-Quadruplex/Hemin DNAzyme.

Huangxian JuJun ZhouJielin ChenMingpan ChengDavid MonchaudYuehua Guo

subject

Catalytic transformationDNAzymeoxidationDeoxyribozymeaptamersspecificityNanotechnologyBiocompatible MaterialsdnainsightsG-quadruplex010402 general chemistry[ CHIM ] Chemical Sciences01 natural sciencesperoxidase-mimicking dnazymesCatalysisCatalysischemistry.chemical_compoundOxidizing agent[CHIM]Chemical SciencesBenzothiazolesthermophilicityComputingMilieux_MISCELLANEOUSPeroxidaseChemistry010405 organic chemistryThermophileperoxidase activityGeneral Chemistry[CHIM.CATA]Chemical Sciences/CatalysisGeneral MedicineDNA CatalyticHydrogen PeroxideCombinatorial chemistry0104 chemical sciencesG-QuadruplexesMethylene BluekineticsHeminactivity enhancementSulfonic AcidsporphyrinOxidation-ReductioncomplexHemin

description

International audience; The quadruplex-based DNAzyme system is one of the most useful artificial enzymes or catalysts; their unique properties make them reliable alternatives to proteins for performing catalytic transformation. The first prototype of a thermally stable DNAzyme system is presented. This thermophilic DNAzyme is capable of oxidizing substrates at high temperatures (up to 95 degrees C) and long reaction times (up to 18 h at 75 degrees C). The catalytic activity of the DNAzymes were investigated with the standard peroxidase-mimicking oxidation of 2,2'-azino-bis(3-ethylbenzothiozoline-6-sulfonic acid) (ABTS) by H2O2. The step-by-step design of this unique heat-activated G-quadruplex/hemin catalyst, including the modification of adenines at both ends of G-tracts, the choice of cation, and its concentration for DNAzyme stabilization, is described. This work investigates thoroughly the molecular basis of these catalytic properties and provides an example of an industrially relevant application.

10.1002/anie.201708964https://pubmed.ncbi.nlm.nih.gov/29105965