Cited by 172Genomics and Chromatin DynamicsChromosomal and Genetic VariationsBioinformatics and Genomic Networks

A supervised learning framework for chromatin loop detection in genome-wide contact maps

Open access
Salameh, Tarik J., Wang, Xiaotao, Song, Fan, Zhang, Bo, Wright, Sage M., Khunsriraksakul, Chachrit, Ruan, Yijun, Yue, Feng·2020·Nature Communications

Published version of a preprint

Abstract

Accurately predicting chromatin loops from genome-wide interaction matrices such as Hi-C data is critical to deepening our understanding of proper gene regulation. Current approaches are mainly focused on searching for statistically enriched dots on a genome-wide map. However, given the availability of orthogonal data types such as ChIA-PET, HiChIP, Capture Hi-C, and high-throughput imaging, a supervised learning approach could facilitate the discovery of a comprehensive set of chromatin interactions. Here, we present Peakachu, a Random Forest classification framework that predicts chromatin loops from genome-wide contact maps. We compare Peakachu with current enrichment-based approaches, and find that Peakachu identifies a unique set of short-range interactions. We show that our models perform well in different platforms, across different sequencing depths, and across different species. We apply this framework to predict chromatin loops in 56 Hi-C datasets, and release the results at the 3D Genome Browser.

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  • Peakachu detects loops as CTCF or H3K27ac loops depending on a pre-trained CTCF model or H3K27ac model.

    “Peakachu detects loops as CTCF or H3K27ac loops depending on a pre-trained CTCF model or H3K27ac model.”
  • Peakachu reports a probability score associated with each loop that demarcates confidence of loop calling and is positively associated with loop intensity.

    “Peakachu reports a probability score associated with each loop which demarcates confidence of loop calling. The probability score is also positively associated with the loop intensity, making it convenient for differential loop analysis.”

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Authors
Salameh, T. J., Wang, X., Song, F., Zhang, B., Wright, S. M., Khunsriraksakul, C., Ruan, Y., & Yue, F.
Affiliations
  • Pennsylvania State University (US)
  • Northwestern University (US)
  • The Jackson Laboratory for Genomic Medicine (US)
Corresponding author
  • Wang, Xiaotao
  • Yue, Feng
Venue
Nature Communications
Published
2020-07-09
Volume
11
Issue
1
Pages
3428-3428
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3041895828
Cited by
165
References
57
Citations by year
2026: 26 · 2025: 33 · 2024: 34 · 2023: 32 · 2022: 18 · 2021: 18 · 2020: 4
FWCI
6.33
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • The Mouseion at the JAXlibrary (Jackson Laboratory) (submittedVersion)
Funders
  • U.S. Department of Health & Human Services | NIH | National Human Genome Research Institute (R01HG009906)
  • U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (R35GM124820)
  • U.S. Department of Health & Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (R24DK106766)
  • U.S. Department of Health & Human Services | NIH | NCI | Division of Cancer Epidemiology and Genetics, National Cancer Institute (U01CA200060)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
Keywords
Hi-C contact maps, random forest classification, 3D genome organization, gene expression regulation, ChIA-PET, HiChIP, Capture Hi-C
MeSH terms
Supervised Machine Learning, Chromatin, Humans, Organ Specificity, Species Specificity, Genome, Sequence Analysis, DNA, K562 Cells, Databases, Genetic

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