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Sequence and chromatin determinants of cell-type–specific transcription factor binding

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Arvey, Aaron, Agius, Phaedra, Noble, William Stafford, Leslie, Christina·2012·Genome Research

Abstract

Gene regulatory programs in distinct cell types are maintained in large part through the cell-type–specific binding of transcription factors (TFs). The determinants of TF binding include direct DNA sequence preferences, DNA sequence preferences of cofactors, and the local cell-dependent chromatin context. To explore the contribution of DNA sequence signal, histone modifications, and DNase accessibility to cell-type–specific binding, we analyzed 286 ChIP-seq experiments performed by the ENCODE Consortium. This analysis included experiments for 67 transcriptional regulators, 15 of which were profiled in both the GM12878 (lymphoblastoid) and K562 (erythroleukemic) human hematopoietic cell lines. To model TF-bound regions, we trained support vector machines (SVMs) that use flexible k-mer patterns to capture DNA sequence signals more accurately than traditional motif approaches. In addition, we trained SVM spatial chromatin signatures to model local histone modifications and DNase accessibility, obtaining significantly more accurate TF occupancy predictions than simpler approaches. Consistent with previous studies, we find that DNase accessibility can explain cell-line–specific binding for many factors. However, we also find that of the 10 factors with prominent cell-type–specific binding patterns, four display distinct cell-type–specific DNA sequence preferences according to our models. Moreover, for two factors we identify cell-specific binding sites that are accessible in both cell types but bound only in one. For these sites, cell-type–specific sequence models, rather than DNase accessibility, are better able to explain differential binding. Our results suggest that using a single motif for each TF and filtering for chromatin accessible loci is not always sufficient to accurately account for cell-type–specific binding profiles.

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Metadata

Authors
Arvey, A., Agius, P., Noble, W. S., & Leslie, C.
Venue
Genome Research
Published
2012-09
Volume
22
Issue
9
Pages
1723-1734
ISSN
1088-9051 (ISSN-L)
OpenAlex
W1989338936
Cited by
222
References
9
Type
posted content
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Sequence and chromatin determinants of cell-type–specific transcription factor binding. https://app.cochat.ai/papers/10.1101/gr.127712.111
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Arvey, A., Agius, P., Noble, W. S., & Leslie, C. (2012). Sequence and chromatin determinants of cell-type–specific transcription factor binding. Genome Research. https://doi.org/10.1101/gr.127712.111

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