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Length Discrimination of Homo-oligomeric Nucleic Acids with Single-molecule Measurement

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Abstract

Single-molecule DNA/RNA sequencing based on single-molecule measurement is a prominent method for higher throughput sequencing. In a previous report, the single-molecule DNA/RNA sequencing method has applied to detect each base-conductance difference in the tunneling current time profiles, and determined the sequence. However, discrimination of identical base lengths has not yet been achieved. The number of the identical contiguous bases has importance in biology because some homopolymers of nucleic acid control gene expression. In this study, we aimed to develop a method for discriminating the length of homopolymer of nucleic acids of adenosine monophosphate (AMP) using a single-molecule sequencing technique. We carried out single-molecule conductance measurements of adenine pentamer, hexamer and heptamer. The single-molecule signals of the oligomers are not distinguishable from current and duration time histograms. The three oligomers were discriminated by our developed machine learning-based analysis with accuracy of 0.54 for a single signal, and 99% for 40 signals. This method will be applied to the single signals and identify the contiguous bases in the sequence and provide new biological insights.

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Authors and Affiliations

  1. The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

    Yuki Komoto, Takahito Ohshiro & Masateru Taniguchi

  2. Artificial Intelligence Research Center The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

    Yuki Komoto

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  1. Yuki Komoto
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  2. Takahito Ohshiro
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  3. Masateru Taniguchi
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Correspondence to Masateru Taniguchi.

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Komoto, Y., Ohshiro, T. & Taniguchi, M. Length Discrimination of Homo-oligomeric Nucleic Acids with Single-molecule Measurement. ANAL. SCI. 37, 513–517 (2021). https://doi.org/10.2116/analsci.20SCP13

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  • DOI: https://doi.org/10.2116/analsci.20SCP13

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