Nanopore Detector based analysis of single-molecule conformational kinetics and binding interactions

Area of Science:

• Biophysics
• Analytical Chemistry
• Molecular Biology

Background:

• Nanopore detectors convert single molecule events into measurable channel current changes.
• These detectors can analyze molecular kinetics directly through blockade properties or indirectly using reporter molecules.
• The embedded kinetic information in blockade measurements provides insights into molecular adsorption-desorption and conformational changes.

Purpose of the Study:

• To investigate the potential of nanopore detection for observing single-molecule reaction histories.
• To explore applications in DNA sequencing, single nucleotide polymorphism (SNP) analysis, and biosensing.
• To demonstrate nanopore capabilities in discriminatory biosensing, binding strength characterization, and immunological screening.

Main Methods:

• Utilizing nanopore-based detectors to transduce single molecule events into ionic current changes.
• Analyzing blockade properties and kinetic information of individual molecules.
• Employing reporter molecules for indirect molecular characterization.

Main Results:

• Preliminary results support the hypothesis that reaction histories of individual molecules can be observed in various systems (DNA/DNA, DNA/Protein, Protein/Protein).
• Demonstrated nanopore detection capabilities for highly discriminatory biosensing.
• Showcased potential for binding strength characterization and rapid immunological screening.

Conclusions:

• Nanopore detection offers a novel single-molecule observation method for chemistry.
• This technique allows tracking of both external molecular binding states and internal conformation states.
• The method opens new avenues for detailed molecular analysis and various applications.