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Related Experiment Video

Updated: Aug 27, 2025

Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
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Reduced Representation Bisulfite Sequencing (RRBS).

Kazuhiko Nakabayashi1, Michihiro Yamamura2, Keita Haseagawa3

  • 1Department of Maternal-Fetal Biology, Research Institute, National Center for Child Health and Development, Setagaya, Tokyo, Japan. nakabaya-k@nccd.go.jp.

Methods in Molecular Biology (Clifton, N.J.)
|September 29, 2022
PubMed
Summary

Reduced representation bisulfite sequencing (RRBS) provides a cost-effective method for analyzing DNA methylation patterns in CpG-rich regions. This study details streamlined, gel-free protocols for RRBS library preparation, quality control, and data analysis.

Keywords:
DNA methylationMethylomeMspINext-generation sequencingReduced representation bisulfite sequencing

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Area of Science:

  • Genomics
  • Epigenetics
  • Molecular Biology

Background:

  • Reduced representation bisulfite sequencing (RRBS) is a widely used technique for studying DNA methylation.
  • It enriches CpG-rich genomic regions, enabling methylation analysis at 5-10% of mammalian CpG sites.
  • Current RRBS protocols can be time-consuming and labor-intensive.

Purpose of the Study:

  • To present optimized, gel-free protocols for RRBS library preparation.
  • To streamline quality control, sequencing, and data analysis procedures for RRBS.
  • To provide a faster and more efficient RRBS workflow.

Main Methods:

  • Utilized MspI restriction enzyme for CpG-rich region enrichment.
  • Developed gel-free library preparation protocols.
  • Incorporated quality control, sequencing, and data analysis steps.

Main Results:

  • The described protocols enable efficient RRBS library preparation from 100 ng of genomic DNA.
  • Library preparation and quality control can be completed for up to eight samples in 3 days.
  • Typically requires nine cycles of polymerase chain reaction (PCR) amplification.

Conclusions:

  • The presented gel-free RRBS protocols offer a streamlined and efficient approach for DNA methylation analysis.
  • These optimized methods reduce hands-on time and facilitate large-scale epigenomic studies.
  • The protocols are suitable for investigating DNA methylation patterns in gene promoters and CpG islands.