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Chromatin immunoprecipitation (ChIP) coupled to detection by quantitative real-time PCR to study transcription factor binding to DNA in Caenorhabditis elegans

Nature Protocols volume 3, pages 698709 (2008) | Download Citation

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Abstract

In order to determine how signaling pathways differentially regulate gene expression, it is necessary to identify the interactions between transcription factors (TFs) and their cognate cis-regulatory DNA elements. Here, we have outlined a chromatin immunoprecipitation (ChIP) protocol for use in whole Caenorhabditis elegans extracts. We discuss optimization of the procedure, including growth and harvesting of the worms, formaldehyde fixation, TF immunoprecipitation and analysis of bound sequences through real-time PCR. It takes 10–12 d to obtain the worm culture for ChIP; the ChIP procedure is spaced out over a period of 2.5 d with two overnight incubations.

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Acknowledgements

H.A.T. is a William Randolph Hearst Young Investigator. This project was funded in part by a Burroughs Wellcome Career Award in the Biomedical Sciences to H.A.T., an endowment from the William Randolph Hearst Foundation, and grants from the National Institute of Diabetes and Digestive and Kidney Diseases (DK068429 to A.J.M.W.) and National Institute of Aging (AG25891 to H.A.T.).

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  1. Program in Gene Function and Expression, Program in Molecular Medicine, Aaron Lazare Research Building, University of Massachusetts Medical School, 364 Plantation Street, Worcester, Massachusetts 01605, USA.

    • Arnab Mukhopadhyay
    • , Bart Deplancke
    • , Albertha J M Walhout
    •  & Heidi A Tissenbaum

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Contributions

A.M. and B.D. contributed equally to the work.

Corresponding author

Correspondence to Heidi A Tissenbaum.

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https://doi.org/10.1038/nprot.2008.38

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