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research article

Exploring New Nanopore Sensors from the Aerolysin Family

Bada Juarez, Juan F.  
•
Cirauqui, Nuria
•
Meireles, Fernando Augusto T. P.
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July 7, 2025
Small

Aerolysin‐like proteins are a family of pore‐forming toxins with potential biotechnological applications as nanopore sensors for biomolecular detection and sequencing. Despite their conserved structural fold, the low sequence identity complicates sequence alignment, limiting the understanding of their pore structure and properties. Here, the pore structures of three family members – Clostridium perfringens epsilon toxin (ETX), Laetiporus sulphureus lectin (LSL), and Bacillus thuringiensis parasporin‐2 – are analyzed and compared to aerolysin and assess their single‐strand DNA (ssDNA) sensing capabilities through in silico methods. ETX is further characterized experimentally, revealing three distinct pore conformations, each with specific open pore currents, only one of which translocates ssDNA. Notably, ETX exhibited higher current blockage depth compared to aerolysin during ssDNA translocation, indicating a higher sensitivity for molecular sensing. The findings open new avenues for improving and diversifying nanopore capabilities in molecular sensing.

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Type
research article
DOI
10.1002/smll.202501219
Author(s)
Bada Juarez, Juan F.  

École Polytechnique Fédérale de Lausanne

Cirauqui, Nuria

École Polytechnique Fédérale de Lausanne

Meireles, Fernando Augusto T. P.

École Polytechnique Fédérale de Lausanne

Perrin, Louis W.
Barry, Julian  

École Polytechnique Fédérale de Lausanne

Bokori‐Brown, Monika
Marcaida, Maria J.  

École Polytechnique Fédérale de Lausanne

Cao, Chan
Dal Peraro, Matteo  

École Polytechnique Fédérale de Lausanne

Date Issued

2025-07-07

Publisher

Wiley

Published in
Small
Article Number

2501219

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
UPDALPE  
FunderFunding(s)Grant NumberGrant URL

Novartis Foundation

532589

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

PR00P3_193090,310030_215073,205321_192371

Available on Infoscience
July 14, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/252212
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