Cited by 37Epigenetics and DNA MethylationSingle-cell and spatial transcriptomicsGenomics and Chromatin Dynamics

CpG Transformer for imputation of single-cell methylomes

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De Waele, Gaetan, Clauwaert, Jim, Menschaert, Gerben, Waegeman, Willem·2022·Bioinformatics

Published version of a preprint

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
Published
2021-10-28
Volume
38
Issue
3
Pages
597-603
ISSN
  • 1367-4803 (ISSN-L)
  • 1367-4811
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
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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