CpG Transformer for imputation of single-cell methylomes
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Abstract
Motivation: The adoption of current single-cell DNA methylation sequencing protocols is hindered by incomplete coverage, outlining the need for effective imputation techniques. The task of imputing single-cell (methylation) data requires models to build an understanding of underlying biological processes. Results: We adapt the transformer neural network architecture to operate on methylation matrices through combining axial attention with sliding window self-attention. The obtained CpG Transformer displays state-of-the-art performances on a wide range of scBS-seq and scRRBS-seq datasets. Furthermore, we demonstrate the interpretability of CpG Transformer and illustrate its rapid transfer learning properties, allowing practitioners to train models on new datasets with a limited computational and time budget. Availability and implementation: CpG Transformer is freely available at https://github.com/gdewael/cpg-transformer. Supplementary information: Supplementary data are available at Bioinformatics online.
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- Authors
- De Waele, G., Clauwaert, J., Menschaert, G., & Waegeman, W.
- Affiliations
- Department of Data Analysis and Mathematical Modelling, Ghent University , Ghent 9000, Belgium
- Ghent University (BE)
- Corresponding author
- Waegeman, Willem
- Venue
- Bioinformatics
- Publisher
- Oxford University Press (OUP)
- Published
- 2021-10-28
- Volume
- 38
- Issue
- 3
- Pages
- 597-603
- ISSN
- 1367-4803 (ISSN-L)
- 1367-4811
- PMC
- PMC8756163
- OpenAlex
- W3210982033
- Cited by
- 37
- References
- 8
- Citations by year
- 2026: 8 · 2025: 8 · 2024: 5 · 2023: 10 · 2022: 6
- FWCI
- 1.65
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Bioinformatics (publishedVersion, cc-by)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Ghent University Academic Bibliography (Ghent University) (submittedVersion, cc-by)
- Funders
- Ghent University (BOFGOA2020000703)
- Flemish Government under the ‘Onderzoeksprogramma Artificiële Intelligentie (AI) Vlaanderen’ Programme
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
- Keywords
- single-cell DNA methylation, transformer models, axial attention, interpretability, transfer learning
- MeSH terms
- Epigenome, Base Sequence, Neural Networks, Computer, Sequence Analysis, DNA, DNA Methylation
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