DOM: Dual Optical Mapping Integrating Sequence-Specific Barcodes and A/T Density Profiles
Jaeyoung Bae1, Yunchul Kim2, Joohee Choe1
1Department of Chemistry, Sogang University, Seoul, South Korea.
Small Methods
|July 23, 2026
Summary
Dual Optical Mapping (DOM) combines barcode and intensity data for precise single-molecule genome mapping. This novel approach significantly improves accuracy and confidence in mapping bacterial and human genomes.
Area of Science:
- Genomics
- Molecular Biology
- Bioinformatics
Background:
- Single-molecule optical genome mapping is crucial for understanding genomic structure and function.
- Current methods using only barcodes or intensity profiles have limitations in accuracy.
- Integrating diverse data sources is key to advancing genome mapping technologies.
Purpose of the Study:
- To develop a novel dual-channel framework for enhanced single-molecule genome mapping.
- To improve the accuracy and confidence of optical genome mapping by combining complementary data.
- To establish a scalable method applicable to both bacterial and human genomes.
Main Methods:
- Developed Dual Optical Mapping (DOM), integrating sequence-specific barcodes with AT frequency-dependent intensity profiles.
- Applied DOM to the E. coli genome (4.6 Mbp) for validation.
- Extended DOM to the human genome using genome-wide cross-correlation scanning and placement score ranking.
Main Results:
- DOM achieved high accuracy in mapping the E. coli genome, with 95% of molecules correctly identified as the top match.
- 98% of E. coli molecules were validated after quality control, demonstrating robustness.
- The framework proved scalable and effective for the complex human genome.
Conclusions:
- Dual Optical Mapping (DOM) offers a significant advancement in single-molecule genome mapping accuracy.
- The unified dual-channel framework enhances positional specificity and alignment confidence.
- DOM is a scalable and powerful tool for high-accuracy genome mapping across diverse species.
