Related Experiment Video
Updated: May 31, 2026
08:38
Targeted DNA Methylation Analysis by Next-generation Sequencing
Published on: February 24, 2015
Comparative analyses of DNA methylation and sequence evolution using Nasonia genomes
Jungsun Park1, Zuogang Peng, Jia Zeng
1Bioinformatics and Biostatistics Laboratory, Interdisciplinary Program in Bioinformatics, Department of Statistics, Seoul National University, Seoul, Korea.
Molecular Biology and Evolution
|June 23, 2011
Summary
DNA methylation is prevalent in Nasonia insects, influencing gene regulation and genome evolution. Lower methylation correlates with higher mutation rates, revealing its role in sequence evolution.
Area of Science:
- Insect genomics
- Epigenetics
- Evolutionary biology
Background:
- The role of DNA methylation in insect genomes is not fully understood.
- Nasonia species offer a valuable model for comparative genomics due to available related genomes.
Purpose of the Study:
- To investigate the prevalence and functional significance of DNA methylation in Nasonia vitripennis.
- To explore the correlation between DNA methylation, CpG depletion, and genome evolution in Nasonia.
Main Methods:
- Direct sequencing of bisulfite-converted DNA from Nasonia vitripennis.
- Comparative analysis of DNA methylation patterns and CpG depletion across Nasonia and honeybee orthologous genes.
- Correlation analysis between CpG depletion and substitution rates in closely related Nasonia species.
Main Results:
- Substantial DNA methylation was found in 17 out of 18 Nasonia vitripennis genes, strongly correlating with CpG depletion.
- The sex-determining transformer locus showed differential methylation patterns in alternatively spliced exons.
- Nasonia and honeybee orthologous genes displayed similar CpG depletion levels and functional enrichments despite significant divergence.
- CpG depletion negatively correlated with substitution rates, suggesting mutation rates increase with decreased germline methylation.
Conclusions:
- DNA methylation is widespread in the Nasonia genome and likely plays roles in gene regulation, including sex determination and alternative splicing.
- DNA methylation levels are linked to genome and sequence evolution, potentially by influencing mutation rates.
- Comparative genomic analyses highlight conserved patterns of DNA methylation and CpG depletion between Nasonia and honeybees, underscoring evolutionary significance.
Related Concept Videos
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
03:00Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
01:29Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...