Direct identification of on-bead peptides using surface-enhanced Raman spectroscopic barcoding system for...

Area of Science:

• Chemistry
• Biotechnology
• Spectroscopy

Background:

• Compound library screening is crucial for drug discovery, biomarker detection, and biomolecular profiling.
• Existing encoding/decoding methods like chemical, graphical, and optical encoding have limitations.
• There is a need for efficient and reliable methods for identifying and screening large compound libraries.

Purpose of the Study:

• To present a simple and efficient surface-enhanced Raman spectroscopic (SERS) barcoding method for compound library screening.
• To demonstrate the capability of SERS nanoparticles (SERS ID) in generating unique codes for library identification.
• To validate the stability and reliability of the SERS barcoding method under bioassay conditions.

Main Methods:

• Development of a SERS barcoding system utilizing highly sensitive SERS nanoparticles (SERS ID).
• Encoding of 44 distinct SERS IDs, with potential for over a million unique codes through combinations.
• Application of the SERS ID encoding platform for identifying peptide ligands and quantifying protein binding affinity.

Main Results:

• The SERS barcoding method demonstrated high stability and reliability in bioassay conditions.
• The platform successfully identified peptide ligands attached to beads.
• The method allowed for the quantification of binding affinity between ligands and specific proteins.

Conclusions:

• The presented SERS barcoding technology is a promising tool for screening one-bead-one-compound (OBOC) libraries.
• This method offers a simple, efficient, and reliable approach for accelerating drug discovery processes.
• SERS ID-based screening enhances the capabilities of biomarker detection and biomolecular profiling.