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Reproducibility and Consistency of In Vitro Nucleosome Reconstitutions Demonstrated by Invitrosome Isolation and Sequencing

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  • Colton E Kempton
  • Justin R Heninger
  • Steven M Johnson

Abstract

Nucleosomes and their positions in the eukaryotic genome play an important role in regulating gene expression by influencing accessibility to DNA. Many factors influence a nucleosome's final position in the chromatin landscape including the underlying genomic sequence. One of the primary reasons for performing in vitro nucleosome reconstitution experiments is to identify how the underlying DNA sequence will influence a nucleosome's position in the absence of other compounding cellular factors. However, concerns have been raised about the reproducibility of data generated from these kinds of experiments. Here we present data for in vitro nucleosome reconstitution experiments performed on linear plasmid DNA that demonstrate that, when coverage is deep enough, these reconstitution experiments are exquisitely reproducible and highly consistent. Our data also suggests that a coverage depth of 35X be maintained for maximal confidence when assaying nucleosome positions, but lower coverage levels may be generally sufficient. These coverage depth recommendations are sufficient in the experimental system and conditions used in this study, but may vary depending on the exact parameters used in other systems.

Suggested Citation

  • Colton E Kempton & Justin R Heninger & Steven M Johnson, 2014. "Reproducibility and Consistency of In Vitro Nucleosome Reconstitutions Demonstrated by Invitrosome Isolation and Sequencing," PLOS ONE, Public Library of Science, vol. 9(8), pages 1-11, August.
  • Handle: RePEc:plo:pone00:0103752
    DOI: 10.1371/journal.pone.0103752
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    References listed on IDEAS

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    1. Anton Valouev & Steven M. Johnson & Scott D. Boyd & Cheryl L. Smith & Andrew Z. Fire & Arend Sidow, 2011. "Determinants of nucleosome organization in primary human cells," Nature, Nature, vol. 474(7352), pages 516-520, June.
    2. Noam Kaplan & Irene K. Moore & Yvonne Fondufe-Mittendorf & Andrea J. Gossett & Desiree Tillo & Yair Field & Emily M. LeProust & Timothy R. Hughes & Jason D. Lieb & Jonathan Widom & Eran Segal, 2009. "The DNA-encoded nucleosome organization of a eukaryotic genome," Nature, Nature, vol. 458(7236), pages 362-366, March.
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