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Related Experiment Video

Updated: Dec 24, 2025

Targeted DNA Methylation Analysis by Next-generation Sequencing
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Methylation-driven model for analysis of dinucleotide evolution in genomes.

Jian-Hong Sun1,2, Shi-Meng Ai3, Shu-Qun Liu4

  • 1State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan & School of Life Sciences, Yunnan University, Kunming, 650091, China.

Theoretical Biology & Medical Modelling
|April 9, 2020
PubMed
Summary

CpG mutations significantly influence vertebrate genome evolution. A new methylation-driven model (MDM) accurately predicts changes in dinucleotide frequencies and GC content, particularly in mammalian genomes.

Keywords:
DinucleotideGenome compositionGenome evolutionMethylation-induced mutation

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Area of Science:

  • Genomics
  • Molecular Evolution
  • Bioinformatics

Background:

  • CpGs are key methylation sites in vertebrate genomes.
  • CpG to TpG/CpA mutations impact genome composition evolution.
  • Quantitative effects of these mutations on dinucleotide frequencies are not well understood.

Purpose of the Study:

  • To develop a model predicting genome composition changes due to CpG mutations.
  • To quantify the impact of methylation on dinucleotide frequencies and GC content evolution.

Main Methods:

  • Proposed a methylation-driven model (MDM) based on neutral theory.
  • Applied MDM to 10 published vertebrate genomes.
  • Predicted changes in 16 dinucleotide frequencies and GC content.

Main Results:

  • MDM showed good consistency between predicted and observed trends for most dinucleotides and GC content.
  • The model performed better on mammalian genomes than lower-vertebrate genomes.
  • Model performance varied based on genome characteristics and initial states.

Conclusions:

  • The methylation-driven model has potential for studying methylation's role in genome evolution.
  • Successful application to mammalian genomes highlights its utility.
  • Further refinement may address limitations and improve accuracy for all vertebrate genomes.