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Methodology for Accurate Detection of Mitochondrial DNA Methylation
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DAMEfinder: a method to detect differential allele-specific methylation.

Stephany Orjuela1,2, Dania Machlab3, Mirco Menigatti2

  • 1Institute of Molecular Life Sciences and SIB Swiss Institute of Bioinformatics, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland.

Epigenetics & Chromatin
|June 4, 2020
PubMed
Summary

A new R package, DAMEfinder, screens for differential allele-specific methylation (ASM) by analyzing bisulfite sequencing data. It identifies regions with altered ASM, aiding in understanding DNA methylation

Keywords:
Allele-specific methylation (ASM)DNA methylationDifferential methylationImprinting

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Area of Science:

  • Epigenetics
  • Genomics
  • Computational Biology

Background:

  • DNA methylation is a key epigenetic regulator of gene expression.
  • Allele-specific methylation (ASM) is crucial for genomic imprinting and X chromosome inactivation.
  • Sequence-dependent ASM is linked to genetic variations like SNPs.

Purpose of the Study:

  • To develop a computational method for screening genomic regions with altered ASM.
  • To identify differential ASM (DAMEs) between conditions using bisulfite sequencing data.
  • To provide an R package, DAMEfinder, for analyzing ASM changes.

Main Methods:

  • Developed a novel ASM scoring method using bisulfite sequencing data.
  • Leveraged existing computational techniques within the DAMEfinder R package.
  • Quantified ASM changes between conditions and clustered regions with consistent alterations.

Main Results:

  • DAMEfinder accurately distinguishes imprinted/non-imprinted regions and sexes based on X inactivation.
  • The method identified differential ASM signatures in colorectal cancer subtypes.
  • Successfully re-identified known instances of loss of imprinting.

Conclusions:

  • DAMEfinder detects differential ASM (DAMEs), offering a refined view beyond differential methylation.
  • This tool aids in deciphering the complex roles of DNA methylation in development and disease.
  • The package facilitates the discovery of novel ASM patterns relevant to various biological contexts.