Spatially multiplexed single-molecule translocations through a nanopore at controlled speeds.
Nat Nanotechnol
; 18(9): 1078-1084, 2023 09.
Article
en En
| MEDLINE
| ID: mdl-37337057
In current nanopore-based label-free single-molecule sensing technologies, stochastic processes influence the selection of translocating molecule, translocation rate and translocation velocity. As a result, single-molecule translocations are challenging to control both spatially and temporally. Here we present a method using a glass nanopore mounted on a three-dimensional nanopositioner to spatially select molecules, deterministically tethered on a glass surface, for controlled translocations. By controlling the distance between the nanopore and glass surface, we can actively select the region of interest on the molecule and scan it a controlled number of times and at a controlled velocity. Decreasing the velocity and averaging thousands of consecutive readings of the same molecule increases the signal-to-noise ratio by two orders of magnitude compared with free translocations. We demonstrate the method's versatility by assessing DNA-protein complexes, DNA rulers and DNA gaps, achieving down to single-nucleotide gap detection.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Nanoporos
Idioma:
En
Revista:
Nat Nanotechnol
Año:
2023
Tipo del documento:
Article
País de afiliación:
Suiza
Pais de publicación:
Reino Unido