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Small molecule electro-optical binding assay using nanopores

Author

Listed:
  • Shenglin Cai

    (Imperial College London)

  • Jasmine Y. Y. Sze

    (IMED Biotech Unit)

  • Aleksandar P. Ivanov

    (Imperial College London)

  • Joshua B. Edel

    (Imperial College London)

Abstract

The identification of short nucleic acids and proteins at the single molecule level is a major driving force for the development of novel detection strategies. Nanopore sensing has been gaining in prominence due to its label-free operation and single molecule sensitivity. However, it remains challenging to detect small molecules selectively. Here we propose to combine the electrical sensing modality of a nanopore with fluorescence-based detection. Selectivity is achieved by grafting either molecular beacons, complementary DNA, or proteins to a DNA molecular carrier. We show that the fraction of synchronised events between the electrical and optical channels, can be used to perform single molecule binding assays without the need to directly label the analyte. Such a strategy can be used to detect targets in complex biological fluids such as human serum and urine. Future optimisation of this technology may enable novel assays for quantitative protein detection as well as gene mutation analysis with applications in next-generation clinical sample analysis.

Suggested Citation

  • Shenglin Cai & Jasmine Y. Y. Sze & Aleksandar P. Ivanov & Joshua B. Edel, 2019. "Small molecule electro-optical binding assay using nanopores," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09476-4
    DOI: 10.1038/s41467-019-09476-4
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    Cited by:

    1. Ren Ren & Shenglin Cai & Xiaona Fang & Xiaoyi Wang & Zheng Zhang & Micol Damiani & Charlotte Hudlerova & Annachiara Rosa & Joshua Hope & Nicola J. Cook & Peter Gorelkin & Alexander Erofeev & Pavel Nov, 2023. "Multiplexed detection of viral antigen and RNA using nanopore sensing and encoded molecular probes," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    2. Jianxin Yang & Tianle Pan & Zhenming Xie & Wu Yuan & Ho-Pui Ho, 2024. "In-tube micro-pyramidal silicon nanopore for inertial-kinetic sensing of single molecules," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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