Systematic Approach toward Accurate and Efficient DNA Sequencing via Nanoconfinement

Area of Science:

• Computational physics
• Nanotechnology
• Biophysics

Background:

• Nanochannel analysis offers potential for DNA sequencing but faces limitations.
• High cost, low throughput, and low accuracy hinder widespread adoption of current long-read technologies.

Purpose of the Study:

• To optimize DNA loading mechanics within nanoscale confinements for improved sequencing device design.
• To develop a systematic workflow for balancing efficiency and accuracy in DNA sequencing.
• To provide design recommendations for high-throughput, accurate base-pair detection.

Main Methods:

• Employing coarse-grained modeling to simulate DNA mechanics and polymer conformations.
• Calculating mean first-passage time for DNA loading as a function of nanochannel geometry and electric field.
• Analyzing the interplay between confinement free energy and electric potential energy.

Main Results:

• Predicting semiflexible polymer conformations within nanoscale confinements.
• Quantifying DNA loading efficiency and accuracy metrics for design optimization.
• Investigating single-read probability as a key metric for sequencing accuracy and sensing strategy.

Conclusions:

• The developed workflow provides a scalable approach for optimizing DNA sequencing devices for long molecules and complex geometries.
• This systematic approach directly addresses limitations of current nanochannel analysis and long-read technologies.
• Design recommendations are provided to enhance throughput and accuracy in DNA sequencing devices.