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A Duplex Polymerization Strategy for General, Programmable and High-Resolution Nanopore-Based Sensing.

Ruiping Wu1,2, Yesheng Wang1,3, Jin Yu1,3

  • 1State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China.

Angewandte Chemie (International Ed. in English)
|May 25, 2023
PubMed
Summary
This summary is machine-generated.

A new target-induced duplex polymerization strategy (DPS) enhances nanopore sensing for single molecule analysis. This method creates specific, amplified signals, improving resolution and enabling multiplexed assays for diverse applications.

Keywords:
Multiplex AssayNanoporesResolution EnhancementSignal TransductionVirus Detection

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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Molecular Biology

Background:

  • Nanopore sensing offers promise for single-molecule analysis but faces challenges in signal specificity and resolution, particularly with solid-state nanopores.
  • Existing strategies for signal transduction in nanopore sensing are limited, hindering broad applications.

Purpose of the Study:

  • To introduce a high-resolution signal-production concept, the target-induced duplex polymerization strategy (DPS), for enhanced molecular analysis.
  • To demonstrate DPS's ability to generate target-specific signals with controllable characteristics for improved nanopore sensing.

Main Methods:

  • Developed DPS by linking duplex substrates (DSs) with linkers (L) and optional structure tags (ST) to form target-specific polymers.
  • Experimentally validated DPS through mono-polymerization and co-polymerization of DSs.
  • Utilized tetrahedron-DNA structures as STs to generate secondary peaks for enhanced resolution and multiplexing.

Main Results:

  • DPS generates target-specific polymers with controllable duration times and intervals, where polymer duration is the sum of monomer DS durations.
  • Structure tags (STs) provide distinct secondary peaks, significantly enhancing resolution.
  • Demonstrated successful co-polymerization of multiple DSs for complex assays.

Conclusions:

  • DPS is a general, programmable strategy for single-molecule investigation, offering size and concentration amplification with signal specificity.
  • The strategy shows promise for applications including polymerization degree analysis, structure/side chain conformation studies, and programmable multiplex decoding.