Two-dimensional SERS encoding method for on-bead peptide sequencing in high-throughput bioanalysis.

Area of Science:

• Biochemistry
• Analytical Chemistry
• Materials Science

Background:

• High-throughput screening (HTS) is crucial for drug discovery and biological research.
• Current peptide encoding methods face limitations in scalability and code capacity.
• Developing novel, high-capacity encoding strategies is essential for advancing HTS bioassays.

Purpose of the Study:

• To develop a ready-to-read, on-bead peptide encoding method for HTS bioassays.
• To achieve a high code capacity using a limited number of Raman label compounds.
• To enable efficient and scalable screening of peptides.

Main Methods:

• Development of two-dimensional surface-enhanced Raman scattering nano-identifiers (2D-SERS IDs).
• Concurrent labeling of 2D-SERS IDs with two distinct Surface-Enhanced Raman Scattering (SERS) codes.
• Encoding information based on coupling steps and amino acid types.
• On-bead peptide encoding for direct integration into bioassays.

Main Results:

• Generation of over 10 trillion unique codes.
• Utilization of only 30 Raman label compounds to achieve this vast code space.
• Demonstration of a ready-to-read, on-bead encoding system.
• High-throughput compatibility of the developed method.

Conclusions:

• The novel 2D-SERS ID-based peptide encoding method offers unprecedented code capacity for HTS.
• This approach significantly enhances the scalability and efficiency of peptide-based bioassays.
• The technology holds promise for accelerating drug discovery and fundamental biological research through advanced screening capabilities.