Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface
The aerolysin nanopore displays a charming sensing capability for single oligonucleotide discrimination. When reading from the electrochemical signal, stronger interaction between the aerolysin nanopore and oligonucleotide represent prolonged duration time, thereby amplifying the hidden but intrinsi...
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doaj-52c7284469de4f81970033d035b186e92020-11-24T21:54:55ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462019-07-01710.3389/fchem.2019.00528478057Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing InterfaceMeng-Yin Li0Ya-Qian Wang1Yao Lu2Yi-Lun Ying3Yi-Lun Ying4Yi-Tao Long5Yi-Tao Long6School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, ChinaSchool of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, ChinaSchool of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, ChinaSchool of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, ChinaState Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, ChinaSchool of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, ChinaState Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, ChinaThe aerolysin nanopore displays a charming sensing capability for single oligonucleotide discrimination. When reading from the electrochemical signal, stronger interaction between the aerolysin nanopore and oligonucleotide represent prolonged duration time, thereby amplifying the hidden but intrinsic signal thus improving the sensitivity. In order to further understand and optimize the performance of the aerolysin nanopore, we focus on the investigation of the hydrogen bond interaction between nanopore, and analytes. Taking advantage of site-direct mutagenesis, single residue is replaced. According to whole protein sequence screening, the region near K238 is one of the key sensing regions. Such a positively charged amino acid is then mutagenized into cysteine and tyrosine denoted as K238C, and K238Y. As (dA)4 traverses the pores, K238C dramatically produces a six times longer duration time than the WT aerolysin nanopore at the voltage of +120 mV. However, K238Y shortens the dwell time which suggests the acceleration of the translocation causing poor sensitivity. Referring to our previous findings in K238G, and K238F, our results suggest that the hydrogen bond does not dominate the dynamic translocation process, but enhances the interaction between pores and analytes confined in such nanopore space. These insights give detailed information for the rational design of the sensing mechanism of the aerolysin nanopore, thereby providing further understanding for the weak interactions between biomolecules and the confined space for nanopore sensing.https://www.frontiersin.org/article/10.3389/fchem.2019.00528/fullsingle-molecule interfaceoligonucleotidenanoporehydrogen bondnanoconfinement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Meng-Yin Li Ya-Qian Wang Yao Lu Yi-Lun Ying Yi-Lun Ying Yi-Tao Long Yi-Tao Long |
spellingShingle |
Meng-Yin Li Ya-Qian Wang Yao Lu Yi-Lun Ying Yi-Lun Ying Yi-Tao Long Yi-Tao Long Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface Frontiers in Chemistry single-molecule interface oligonucleotide nanopore hydrogen bond nanoconfinement |
author_facet |
Meng-Yin Li Ya-Qian Wang Yao Lu Yi-Lun Ying Yi-Lun Ying Yi-Tao Long Yi-Tao Long |
author_sort |
Meng-Yin Li |
title |
Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface |
title_short |
Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface |
title_full |
Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface |
title_fullStr |
Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface |
title_full_unstemmed |
Single Molecule Study of Hydrogen Bond Interactions Between Single Oligonucleotide and Aerolysin Sensing Interface |
title_sort |
single molecule study of hydrogen bond interactions between single oligonucleotide and aerolysin sensing interface |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Chemistry |
issn |
2296-2646 |
publishDate |
2019-07-01 |
description |
The aerolysin nanopore displays a charming sensing capability for single oligonucleotide discrimination. When reading from the electrochemical signal, stronger interaction between the aerolysin nanopore and oligonucleotide represent prolonged duration time, thereby amplifying the hidden but intrinsic signal thus improving the sensitivity. In order to further understand and optimize the performance of the aerolysin nanopore, we focus on the investigation of the hydrogen bond interaction between nanopore, and analytes. Taking advantage of site-direct mutagenesis, single residue is replaced. According to whole protein sequence screening, the region near K238 is one of the key sensing regions. Such a positively charged amino acid is then mutagenized into cysteine and tyrosine denoted as K238C, and K238Y. As (dA)4 traverses the pores, K238C dramatically produces a six times longer duration time than the WT aerolysin nanopore at the voltage of +120 mV. However, K238Y shortens the dwell time which suggests the acceleration of the translocation causing poor sensitivity. Referring to our previous findings in K238G, and K238F, our results suggest that the hydrogen bond does not dominate the dynamic translocation process, but enhances the interaction between pores and analytes confined in such nanopore space. These insights give detailed information for the rational design of the sensing mechanism of the aerolysin nanopore, thereby providing further understanding for the weak interactions between biomolecules and the confined space for nanopore sensing. |
topic |
single-molecule interface oligonucleotide nanopore hydrogen bond nanoconfinement |
url |
https://www.frontiersin.org/article/10.3389/fchem.2019.00528/full |
work_keys_str_mv |
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