Biological Nanopore Approach for Single-Molecule Protein Sequencing

Area of Science:

• Biophysics
• Molecular Biology
• Analytical Chemistry

Background:

• Proteins play crucial roles in disease occurrence and treatment, making protein sequencing vital for clinical diagnostics and proteomics.
• Single-molecule DNA sequencing using biological nanopores has been successful, but challenges remain for protein sequencing due to the complexity of 20 amino acids.

Purpose of the Study:

• To review recent advances in biological nanopore-based single-molecule protein sequencing (SMPS).
• To highlight progress in native protein unfolding, peptide translocation control, and amino acid identification.
• To discuss the potential applications of SMPS in disease detection.

Main Methods:

• Utilizing biological nanopore technology for single-molecule analysis.
• Investigating native protein unfolding dynamics.
• Developing methods for controlled peptide translocation through nanopores.
• Implementing techniques for identifying individual amino acids based on nanopore signal characteristics.

Main Results:

• Demonstrated feasibility of single-molecule protein sequencing using nanopore confinement.
• Addressed challenges related to the diverse properties of amino acids (charge, volume, hydrophobicity, structure).
• Showcased advancements in controlling protein/peptide movement through the nanopore.
• Explored the potential for real-time amino acid identification.

Conclusions:

• Biological nanopore technology shows significant promise for single-molecule protein sequencing.
• Overcoming amino acid complexity is key to advancing SMPS.
• SMPS holds potential for revolutionizing proteomics and clinical diagnostics, including disease detection.