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High-throughput enantiopurity analysis using enantiomeric DNA-based sensors
Trevor A Feagin1, David P V Olsen1, Zachary C Headman1
1Department of Chemistry and the Center for Cell and Genome Science, University of Utah, Salt Lake City, Utah 84112, United States.
Journal of the American Chemical Society
|March 10, 2015
Summary
This study introduces a novel fluorescence-based DNA aptamer biosensor for rapid, high-throughput analysis of enantiopurity and concentration in small molecules. The method enables simultaneous quantification of both enantiomers, accelerating chiral synthesis optimization.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Molecular Biology
Background:
- Distinguishing between molecular enantiomers is crucial but challenging due to similar physical properties.
- Current methods like chromatography are time-consuming, limiting analytical throughput.
- There is a need for rapid, high-throughput methods for enantiopurity and concentration analysis.
Purpose of the Study:
- To develop a fluorescence-based method for rapid, high-throughput analysis of small-molecule enantiopurity and concentration.
- To utilize enantiomeric DNA aptamer biosensors for simultaneous quantification of both enantiomers.
- To accelerate reaction optimization for chiral small molecule synthesis.
Main Methods:
- Development of enantiomeric DNA biosensors synthesized from D- and L-DNA, labeled with orthogonal fluorophores.
- Application of selective molecular recognition by DNA aptamers to bind specific enantiomers.
- Transduction of target molecule presence into a dose-dependent fluorescence signal.
- Utilizing reciprocal chiral substrate specificity for simultaneous enantiomer quantification.
Main Results:
- Demonstrated rapid and accurate measurement of enantiopurity and concentration for L- and D-tyrosinamide mixtures using DNA biosensors.
- Successfully applied enantiomeric biosensors to optimize reaction conditions for D-tyrosinamide synthesis.
- Mathematical modeling indicated that modest binding selectivity in DNA biosensors is sufficient for fluorescence-based enantiopurity measurement.
Conclusions:
- The developed method provides a generalizable approach for high-throughput analysis of reaction mixtures.
- This technique is anticipated to significantly accelerate reaction optimization for synthesizing high-value chiral small molecules.
- Enantiomeric DNA aptamer biosensors offer a powerful tool for chiral analysis and synthesis development.
