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Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates
Published on: March 5, 2019
Chiral resolution capabilities of DNA oligonucleotides
Luma Tohala1, Farid Oukacine1, Corinne Ravelet1
1Université Grenoble Alpes, DPM UMR 5063, F-38041 Grenoble, CNRS, DPM UMR 5063, F-38041 Grenoble, France.
DNA oligonucleotides (ONs) effectively separate chiral molecules. Researchers screened ten diverse ON sequences, demonstrating their capability to resolve approximately 20 different racemates, including drugs and amino acids, in capillary electrophoresis. This highlights ONs as versatile chiral separation tools.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Molecular Biology
Background:
- Chiral resolution is crucial for pharmaceuticals and biochemistry.
- Developing novel, efficient chiral selectors remains an active research area.
- DNA oligonucleotides (ONs) offer unique structural diversity for molecular recognition.
Purpose of the Study:
- To investigate the potential of diverse DNA oligonucleotides (ONs) as chiral selectors.
- To assess the enantioselective capabilities of various ON structures in capillary electrophoresis.
- To establish a broad analyte selectivity spectrum for nucleic acid-based chiral separation.
Main Methods:
- Screening of ten DNA oligonucleotides with varied compositions and structures (homo-oligonucleotides, duplexes, hairpins, junctions).
- Assessing enantioselective features using ONs as running buffer additives in partial-filling capillary electrophoresis.
- Testing resolution of approximately 20 racemates, including drugs, illegal drugs, amino acids, and nucleosides.
Main Results:
- All screened DNA oligonucleotide sequences demonstrated enantiodiscrimination capabilities for small aromatic compounds.
- Effective chiral resolution was achieved for around 20 racemates using (sub)millimolar DNA concentrations.
- A combination of just three ON sequences sufficed for resolving multiple classes of chiral analytes.
Conclusions:
- DNA oligonucleotides are effective and versatile chiral selectors.
- This study presents the first demonstration of a broad analyte selectivity spectrum for nucleic acid-based chiral separation.
- ONs offer a promising platform for developing novel chiral separation technologies.
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