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Updated: Jul 10, 2026

Nanopore DNA Sequencing for Metagenomic Soil Analysis
Published on: December 14, 2017
Toward single molecule DNA sequencing: direct identification of ribonucleoside and deoxyribonucleoside
Yann Astier1, Orit Braha, Hagan Bayley
1Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, OX1 3TA, Oxford, UK.
Abstract:
Individual nucleic acid molecules might be sequenced by the identification of nucleoside 5'-monophosphates as they are released by processive exonucleases. Here, we show that single molecule detection with a modified protein nanopore can be used to identify ribonucleoside and 2'-deoxyribonucleoside 5'-monophosphates, thereby taking a step along this path. Distinct levels of current block are observed for each of the four members of a set of nucleoside 5'-monophosphates when the molecules bind within a mutant alpha-hemolysin pore, (M113R)(7), equipped with the molecular adapter heptakis-(6-deoxy-6-amino)-beta-cyclodextrin. While our results compare favorably with alternative approaches, further work will be required to improve the accuracy of identification of the nucleic acid bases, to feed each released nucleotide into the pore, and to ensure that every nucleotide is captured by the adapter.
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