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Updated: Jun 11, 2026
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Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
Published on: February 24, 2015
Bisulfite sequencing of DNA
Russell P Darst1, Carolina E Pardo, Lingbao Ai
1University of Florida College of Medicine, Gainesville, Florida, USA.
Current Protocols in Molecular Biology
|June 29, 2010
Summary
Bisulfite genomic sequencing (BGS) precisely maps 5-methylcytosine (m(5)C) on single DNA strands. This method converts unmethylated cytosines to uracil, enabling single-nucleotide resolution of DNA methylation patterns.
Area of Science:
- Molecular Biology
- Genetics
- Epigenetics
Background:
- DNA methylation is a critical epigenetic modification.
- Accurate detection of DNA methylation is essential for understanding gene regulation.
- Existing methods may lack single-molecule resolution.
Purpose of the Study:
- To describe a Bisulfite Genomic Sequencing (BGS) technique.
- To enable precise mapping of 5-methylcytosine (m(5)C) at single-nucleotide resolution.
- To provide guidance for experimental design and error mitigation.
Main Methods:
- Treatment of DNA with bisulfite ions to deaminate unmethylated cytosines.
- Conversion of deaminated cytosines to uracil.
- Amplification of target DNA regions and sequencing of cloned amplicons.
Main Results:
- Determination of 5-methylcytosine positions on single DNA strands.
- Achieved single-nucleotide resolution of DNA methylation.
- Demonstrated applicability to various DNA sources, including formaldehyde-fixed tissue.
Conclusions:
- Bisulfite genomic sequencing offers unparalleled single-molecule resolution for DNA methylation analysis.
- The described BGS technique is versatile and applicable to diverse DNA samples.
- Careful experimental design is crucial for reliable BGS results.
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