Synthetic ligands discovered by in vitro selection

Area of Science:

• Biochemistry
• Molecular Biology
• Drug Discovery

Background:

• Biopolymers' functional properties arise from evolution and in vitro mimicry.
• DNA-programmed synthesis offers potential for evolutionary small-molecule discovery.

Purpose of the Study:

• To test the feasibility of evolutionary strategies for small-molecule discovery.
• To identify novel ligands for the N-terminal SH3 domain of the proto-oncogene Crk.

Main Methods:

• Utilized DNA-programmed combinatorial chemistry to synthesize 100 million distinct compounds.
• Applied an evolutionary selection process over six generations.
• Screened compounds for binding to the Crk SH3 domain.

Main Results:

• Converged molecular population yielded novel SH3 domain ligands.
• Identified ligands exhibit binding affinities comparable to peptide ligands.
• Demonstrated successful application of evolutionary approach in small-molecule discovery.

Conclusions:

• Evolutionary strategies are effective for discovering high-affinity small-molecule ligands.
• DNA-programmed chemistry accelerates and simplifies small-molecule discovery.
• This approach holds significant potential for future drug discovery efforts.