Related Experiment Video
Updated: May 12, 2026
13:47
Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
Published on: February 24, 2015
25.5K
MethPhaser: methylation-based long-read haplotype phasing of human genomes.
Yilei Fu1, Sergey Aganezov2, Medhat Mahmoud3,4
1Department of Computer Science, Rice University, Houston, TX, USA.
Nature Communications
|June 22, 2024
Summary
MethPhaser uses methylation signals to improve haplotype phasing, extending beyond short read limitations. This method enhances understanding of mutation interactions and their impact on phenotype and disease.
Area of Science:
- Genomics
- Epigenetics
- Bioinformatics
Background:
- Haplotype phasing is critical for understanding mutation effects on phenotype and disease.
- Current phasing methods are limited by read length and homozygous regions.
Purpose of the Study:
- To develop a novel method, MethPhaser, to overcome phasing limitations using methylation signals.
- To demonstrate the utility of long-read methylation data for extending haplotype phasing.
Main Methods:
- MethPhaser utilizes methylation signals from Oxford Nanopore Technologies.
- The method integrates methylation data with Single Nucleotide Variation (SNV)-based phasing.
- Evaluated on cell line and patient blood sample data.
Main Results:
- MethPhaser significantly increases phase length (N50 by 78%-151%) with high accuracy (83.4-98.7%).
- Improvements were observed even with varying tissue purity and methylation noise.
- Enhanced phasing across medically relevant genes like HLA.
Conclusions:
- Haplotype-specific methylations are prevalent in human genomes and can be leveraged for phasing.
- MethPhaser offers a powerful approach to improve genomic variant phasing, applicable to human and non-human genomes.
- This advancement aids in understanding complex genotype-phenotype relationships and disease mechanisms.
