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Updated: Jun 28, 2026

A Mass Spectrometry-Based Proteomics Approach for Global and High-Confidence Protein R-Methylation Analysis
09:40

A Mass Spectrometry-Based Proteomics Approach for Global and High-Confidence Protein R-Methylation Analysis

Published on: April 28, 2022

Methylation-sensitive representational difference analysis (MS-RDA).

Toshikazu Ushijima1, Satoshi Yamashita

  • 1Carcinogenesis Division, National Cancer Center Research Institute, Tokyo, Japan.

Methods in Molecular Biology (Clifton, N.J.)
|November 7, 2008
PubMed
Summary

Methylation-sensitive representational difference analysis (MS-RDA) isolates differentially methylated DNA fragments between genomes. This powerful technique enriches unmethylated CpG-rich regions, aiding in genomic analysis across various organisms.

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Area of Science:

  • Genomics
  • Epigenetics
  • Molecular Biology

Background:

  • Methylation-sensitive representational difference analysis (MS-RDA) is a genome subtraction technique.
  • It identifies DNA fragments with differential methylation between two genomes.
  • MS-RDA is applicable across diverse organisms, including those lacking microarray resources.

Purpose of the Study:

  • To describe the methodology and utility of Methylation-sensitive representational difference analysis (MS-RDA).
  • To highlight MS-RDA's capability to enrich unmethylated CpG-rich regions.
  • To underscore the importance of the representational difference analysis (RDA) procedure in identifying methylation differences.

Main Methods:

  • Utilizes genome subtraction to isolate differentially methylated DNA fragments.
  • Enriches for unmethylated CpG-rich regions, which often represent unique genomic sequences.
  • Employs representational difference analysis (RDA) to identify differences between DNA samples.

Main Results:

  • MS-RDA successfully isolates DNA fragments with differential methylation.
  • The method enriches for unmethylated CpG-rich amplicons.
  • Differential methylation patterns can be identified by comparing amplicons from different samples.

Conclusions:

  • MS-RDA is a versatile genome subtraction method for detecting differential DNA methylation.
  • The technique's enrichment of unmethylated CpG-rich regions is a key characteristic.
  • Successful application requires careful execution of the representational difference analysis (RDA) procedure.