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Updated: Sep 11, 2025
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High-Density DNA and RNA microarrays - Photolithographic Synthesis, Hybridization and Preparation of Large Nucleic Acid Libraries
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Design and synthesis of a chemically diverse, lead-like DNA-encoded library from sequential amide coupling
Cameron E Taylor1, Grace Roper1, Rhianna Young2
1Cancer Research Horizons Newcastle Drug Discovery Unit, Chemistry, School of Natural and Environmental Sciences, Newcastle University Bedson Building Newcastle upon Tyne NE1 7RU UK mike.waring@ncl.ac.uk.
RSC Medicinal Chemistry
|August 11, 2025
Summary
We developed DNA-encoded libraries (DELs) using simple chemistry, creating 300 thousand and 3 million-member libraries. These DELs are effective for drug discovery screening and are available to researchers.
Area of Science:
- Medicinal Chemistry
- Chemical Biology
- Drug Discovery
Background:
- DNA-encoded libraries (DELs) offer cost-effective, large-scale compound screening for identifying protein ligands.
- The synthesis and application of DELs are currently limited to a few specialized laboratories.
- There is a need for accessible and robust DEL platforms to broaden their use in drug discovery.
Purpose of the Study:
- To describe the design and synthesis of a medium-sized DNA-encoded library using straightforward amide coupling.
- To detail the chemical and enzymatic methodologies employed in DEL construction.
- To demonstrate the effectiveness, integrity, and chemical diversity of the synthesized DELs.
Main Methods:
- Amide coupling procedures for DEL synthesis.
- Incorporation of chemical and enzymatic steps for library construction.
- Screening of DELs against carbonic anhydrase IX and in silico diversity analysis.
Main Results:
- Successfully synthesized DNA-encoded libraries with 300,000 and 3 million members.
- Demonstrated the integrity of the DELs through successful screening against carbonic anhydrase IX.
- Confirmed the chemical diversity of the DELs via in silico comparison with existing libraries.
Conclusions:
- The described DELs provide a valuable resource for accelerating hit identification in early-phase drug discovery.
- The simple synthesis methods make DEL technology more accessible to a wider range of laboratories.
- These DNA-encoded libraries are available to the academic community, fostering collaborative research efforts.
