Abstract
We recently introduced Cleavage Under Targets & Tagmentation (CUT&Tag), an epigenomic profiling strategy in which antibodies are bound to chromatin proteins in situ in permeabilized nuclei. These antibodies are then used to tether the cut-and-paste transposase Tn5. Activation of the transposase simultaneously cleaves DNA and adds adapters (‘tagmentation’) for paired-end DNA sequencing. Here, we introduce a streamlined CUT&Tag protocol that suppresses DNA accessibility artefacts to ensure high-fidelity mapping of the antibody-targeted protein and improves the signal-to-noise ratio over current chromatin profiling methods. Streamlined CUT&Tag can be performed in a single PCR tube, from cells to amplified libraries, providing low-cost genome-wide chromatin maps. By simplifying library preparation CUT&Tag requires less than a day at the bench, from live cells to sequencing-ready barcoded libraries. As a result of low background levels, barcoded and pooled CUT&Tag libraries can be sequenced for as little as $25 per sample. This enables routine genome-wide profiling of chromatin proteins and modifications and requires no special skills or equipment.
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Acknowledgements
We thank Christine Codomo for pooling Illumina sequencing libraries and members of our laboratory and colleagues at the Fred Hutch for providing input. We are especially grateful to the many Protocols.io subscribers around the world who have tried CUT&Tag and provided helpful comments and feedback that have enriched this protocol. This work was supported by the Howard Hughes Medical Institute (H.S.K.-O. and S.H.), grants R01 HG010492 (S.H.) and R01 GM108699 (K.A.) from the National Institutes of Health and an HCA Seed Network grant from the Chan-Zuckerberg Initiative (S.H.).
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H.S.K.-O. and S.H. developed the protocol with input from K.A and D.H.J. S.H. performed the experiments, and with J.G.H. analyzed the data. S.H. and K.A. wrote the manuscript with input from H.S.K.-O, D.H.J., and J.G.H.
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H.S.K.-O. and S.H. have filed patent applications related to this work.
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Peer review information Nature Protocols thanks Sabrina Krueger, Julia Zeitlinger and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Kaya-Okur, H. S. et al. Nat. Commun. 10, 1930 (2019): https://doi.org/10.1038/s41467-019-09982-5
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Supplementary Note 1 and Supplementary Fig. 1.
Supplementary Table 1
Primer Sequences.
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Kaya-Okur, H.S., Janssens, D.H., Henikoff, J.G. et al. Efficient low-cost chromatin profiling with CUT&Tag. Nat Protoc 15, 3264–3283 (2020). https://doi.org/10.1038/s41596-020-0373-x
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DOI: https://doi.org/10.1038/s41596-020-0373-x
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