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Updated: May 23, 2026
08:38
Targeted DNA Methylation Analysis by Next-generation Sequencing
Published on: February 24, 2015
Ultra-low-input, tagmentation-based whole-genome bisulfite sequencing.
1Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA.
Genome Research
|April 3, 2012
Summary
We developed Tn5mC-seq, a new method for whole-genome bisulfite sequencing. This technique significantly reduces DNA input requirements, enabling efficient methylome analysis even with minimal samples.
Area of Science:
- Genomics
- Epigenetics
- Molecular Biology
Background:
- Whole-genome bisulfite sequencing (WGBS) is crucial for studying DNA methylation.
- Conventional WGBS protocols require substantial amounts of input DNA, limiting their application.
- Developing methods that reduce DNA input is essential for broader accessibility.
Purpose of the Study:
- To adapt transposase-based tagmentation for whole-genome bisulfite sequencing.
- To create a more efficient and DNA-sparing method for methylome analysis.
- To enable high-quality methylome sequencing from low-input DNA samples.
Main Methods:
- Adapted transposase-based in vitro shotgun library construction (tagmentation).
- Developed a novel protocol named Tn5mC-seq.
- Applied Tn5mC-seq to sequence the methylome of a human lymphoblastoid cell line.
Main Results:
- Achieved a >100-fold reduction in starting material compared to conventional protocols.
- Generated highly complex bisulfite sequencing libraries from as little as 10 ng of input DNA.
- Obtained ample useful sequences from 1 ng of input DNA, with ~8.6× high-quality coverage.
Conclusions:
- Tn5mC-seq is a highly efficient method for whole-genome bisulfite sequencing.
- The protocol significantly lowers DNA input requirements for methylome analysis.
- Tn5mC-seq facilitates robust epigenomic studies with limited biological samples.
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