Abstract
Sequencing of DNase I hypersensitive sites (DNase-seq) is a powerful technique for identifying cis-regulatory elements across the genome. We studied the key experimental parameters to optimize performance of DNase-seq. Sequencing short fragments of 50–100 base pairs (bp) that accumulate in long internucleosome linker regions was more efficient for identifying transcription factor binding sites compared to sequencing longer fragments. We also assessed the potential of DNase-seq to predict transcription factor occupancy via generation of nucleotide-resolution transcription factor footprints. In modeling the sequence-specific DNase I cutting bias, we found a strong effect that varied over more than two orders of magnitude. This indicates that the nucleotide-resolution cleavage patterns at many transcription factor binding sites are derived from intrinsic DNase I cleavage bias rather than from specific protein-DNA interactions. In contrast, quantitative comparison of DNase I hypersensitivity between states can predict transcription factor occupancy associated with particular biological perturbations.
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Acknowledgements
This work was supported by grants from the US National Institutes of Health (1R01 GM099409 to X.S.L.; 1U41 HG007000 to X.S.L. and C.A.M.; 2P50 CA090381-06 to C.A.M. and M.B.; 2R01 DK074967-06 to M.B. and X.S.L., 1K99CA172948-01 to H.H.H.); the Mazzone Award (to X.S.L.), the Department of Defense (W81XWH-10-1-0557 to H.H.H.) and the Prostate Cancer Foundation (to M.B.).
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H.H.H., C.A.M., H.L., X.S.L. and M.B. designed the experiments and wrote the manuscript. M.-W.C. and H.H.H. performed the experiments with the help from Y.L., P.K.R. and T.F. C.A.M., S.S.H. and H.H.H. conducted the data analysis with the help from C.Z. and H.X.
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He, H., Meyer, C., Hu, S. et al. Refined DNase-seq protocol and data analysis reveals intrinsic bias in transcription factor footprint identification. Nat Methods 11, 73–78 (2014). https://doi.org/10.1038/nmeth.2762
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DOI: https://doi.org/10.1038/nmeth.2762
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