Volume 9, Issue 4 2401532
Research Article

Tuning the Sensitivity of MoS2 Nanopores: From Labeling to Labeling-Free Detection of DNA Methylation

Chunxiao Zhao

Chunxiao Zhao

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

Search for more papers by this author
Yibo Yang

Yibo Yang

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

Search for more papers by this author
Pinlong Zhao

Pinlong Zhao

School of Cyberspace, Hangzhou Dianzi University, Hangzhou, 310018 P. R. China

Search for more papers by this author
Chongbin Shi

Chongbin Shi

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

Search for more papers by this author
Tianhui Tan

Tianhui Tan

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

Search for more papers by this author
Hongzhen Bai

Corresponding Author

Hongzhen Bai

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

E-mail: [email protected]; [email protected]

Search for more papers by this author
Jiandong Feng

Corresponding Author

Jiandong Feng

Laboratory of Experimental Physical Biology, Department of Chemistry, Zhejiang University, Hangzhou, 310058 P. R. China

E-mail: [email protected]; [email protected]

Search for more papers by this author
First published: 18 November 2024
Citations: 1

Abstract

DNA methylation discrimination is often challenged by complicated pretreatment, insufficient sensitivity, and suboptimal accuracy. Here, single-molecule readout of DNA methylation is reported using single-layer MoS2 nanopores. By tuning pore dimension, the sensitivity of MoS2 nanopores is manipulated, empowering both labeling and labeling-free strategies for DNA methylation discrimination. With methyl-CpG-binding domain protein 1 (MBD1)-labeled methylated DNA translocation in customized nanopores, multiple methylated sites with distance as short as 70 bp in double strand DNA can be resolved. To further improve spatial resolution, small MoS2 nanopores are engineered with single-nucleotide sensitivity, realizing labeling-free methylation detection with single-nucleotide resolution to recognize two nucleotides with only one methyl difference. This study demonstrates the availability of engineered MoS2 nanopores in DNA methylation detection, underscoring their potential for epigenetic alteration research at the single-molecule level.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.