DNA aptamers that recognize fluorophore using on-chip screening in combination with an in silico evolution

Area of Science:

• Biotechnology
• Molecular Biology
• Bioinformatics

Background:

• Developing efficient methods for DNA aptamer discovery is crucial for molecular recognition applications.
• Traditional screening methods can be time-consuming and may lack specificity.
• The need for targeted DNA ligands that can bind specific molecules, like fluorophores, is increasing.

Purpose of the Study:

• To develop and validate a novel, efficient screening method for acquiring DNA aptamers.
• To demonstrate the method's capability in selectively recognizing a target molecule, resorufin.
• To combine on-chip screening with in silico evolution for optimized aptamer selection.

Main Methods:

• Development of a novel screening technique integrating on-chip selection with in silico evolution.
• Application of a genetic algorithm to generate a combinatorial library of oligonucleotide sequences.
• Utilizing a DNA microarray for analyzing the binding affinity of the aptamer library against resorufin.

Main Results:

• The developed method efficiently screened for single-stranded DNA aptamers.
• Selective recognition of the fluorophore resorufin was achieved through the combined approach.
• Increased fluorescence intensity on the DNA microarray after three selection rounds indicated successful aptamer enrichment.

Conclusions:

• A novel and efficient screening method for DNA aptamer acquisition has been successfully developed.
• The integration of on-chip selection and computer-evolved sequences provides a powerful tool for DNA ligand screening.
• This method facilitates the identification of high-affinity DNA aptamers for specific molecular targets like resorufin.