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  4. Enhanced Analytes Capture by Engineering Electrostatics at the Entry of Aerolysin Nanopore
 
research article

Enhanced Analytes Capture by Engineering Electrostatics at the Entry of Aerolysin Nanopore

Chazli, Marwan El
•
Juarez, Juan F. Bada  
•
Perrin, Louis W.
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May 9, 2025
Helvetica Chimica Acta

Nanopore technology is a powerful single‐molecule platform for detecting and sequencing a wide range of biomolecules. Among nanopores, aerolysin has emerged as a particularly promising candidate for peptide sensing. However, its ability to capture long biopolymers is limited due to its lack of a vestibule structure. In this study, we engineered electrostatics at the entry of the aerolysin pore and observed an increase in event frequency – up to 2 times higher for DNA and for the peptide compared to wild‐type aerolysin. Importantly, this modification did not affect the pore's current‐voltage characteristics. When tested with DNA and α‐synuclein peptides, the engineered pore (D209R) exhibited comparable dwell times and current blockages to the wild‐type pore, while ion selectivity and electroosmotic flux show an increase. These findings highlight that fine‐tuning the electrostatic properties at the pore entry can significantly enhance event frequency without compromising key transport properties such as current blockage or dwell time. This improvement expands the utility of aerolysin nanopores for sensing and sequencing applications and paves the way for more effective diagnostic tools and analytical methods in the field of proteomics and biomarker discovery.

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Type
research article
DOI
10.1002/hlca.202400180
Author(s)
Chazli, Marwan El

École Polytechnique Fédérale de Lausanne

Juarez, Juan F. Bada  

École Polytechnique Fédérale de Lausanne

Perrin, Louis W.

University of Geneva

Gao, Jinai

University of Geneva

Cao, Chan

University of Geneva

Date Issued

2025-05-09

Publisher

Wiley

Published in
Helvetica Chimica Acta
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
UPDALPE  
FunderFunding(s)Grant NumberGrant URL

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

PR00P3_193090

Available on Infoscience
May 13, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/250085
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