Modular assembly and encoding strategies for dual-display DNA-encoded chemical libraries

Area of Science:

• Biochemistry
• Molecular Biology
• Medicinal Chemistry

Background:

• DNA-encoded chemical libraries (DELs) are powerful tools for identifying protein ligands.
• Conventional DELs typically display one or two molecules on DNA strands.
• Exploring novel DNA structures can enhance DEL capabilities.

Purpose of the Study:

• To investigate the use of diverse DNA structures for dual-molecule display in DELs.
• To compare the performance of hairpin, circular, and linear DNA formats for DEL construction.
• To assess the amplifiability and selection efficiency of these novel DEL formats.

Main Methods:

• Construction of dual-display DELs using hairpin, circular, and linear DNA formats.
• Evaluation of polymerase chain reaction (PCR) amplifiability for each DNA format.
• Affinity capture selection experiments to determine the performance of each DEL methodology.

Main Results:

• Demonstrated feasibility of encoding dual-molecule displays using various DNA structures.
• Compared PCR amplifiability and selection performance across hairpin, circular, and linear formats.
• Highlighted the modularity and adaptability of these novel encoding strategies.

Conclusions:

• Diverse DNA structures can be effectively employed for dual-molecule display in DELs.
• These advanced encoding strategies expand the potential of DNA-encoded chemistry.
• This approach is particularly promising for identifying compounds targeting adjacent epitopes on proteins.