Multitasking water-soluble synthetic G-quartets: from preferential RNA-quadruplex interaction to biocatalytic activity.
Natural G-quartets, a cyclic and coplanar array of four guanine residues held together through a Watson-Crick/Hoogsteen hydrogen-bond network, have received recently much attention due to their involvement in G-quadruplex DNA, an alternative higher-order DNA structure strongly suspected to play important roles in key cellular events. Besides this, synthetic G-quartets (SQ), which artificially mimic native G-quartets, have also been widely studied for their involvement in nanotechnological applications (i.e., nanowires, artificial ion channels, etc.). In contrast, intramolecular synthetic G-quartets (iSQ), also named template-assembled synthetic G-quartets (TASQ), have been more sparingly investigated, despite a technological potential just as interesting. Herein, we report on a particular iSQ named (PNA) DOTASQ, which demonstrates very interesting properties in terms of DNA and RNA interaction (notably its selective recognition of quadruplexes according to a bioinspired process) and catalytic activities, through its ability to perform peroxidase-like hemin-mediated oxidations either in an autonomous fashion (i.e., as pre-catalyst for TASQzyme reactions) or in conjunction with quadruplex DNA (i.e., as enhancing agents for DNAzyme processes). These results provide a solid scientific basis for TASQ to be used as multitasking tools for bionanotechnological applications.
Institut de Chimie Moléculaire de l'Université de Bourgogne, ICMUB CNRS UMR6302, 9, Avenue Alain Savary, 21000 Dijon (France), Fax: (+33) 380-396-117.
Romain
R
Haudecoeur
Loic
L
Stefan
David
D
Monchaud
D055162:Biocatalysis; D004247:DNA / Q000737:chemistry; D054856:G-Quadruplexes; D006427:Hemin / Q000737:chemistry / Q000378:metabolism; D010084:Oxidation-Reduction; D012313:RNA / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D014867:Water; D012313:RNA; D006427:Hemin; D004247:DNA
DNA; G-quadruplexes; G-quartets; RNA; supramolecular chemistry