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    Effects of nucleosome stability on remodeler-catalyzed repositioning

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    Morgan_2018.pdf (1.086Mb)
    Issue Date
    2018-03-30
    Author
    Morgan, Aaron M.
    LeGresley, Sarah E.
    Briggs, Koan
    Al-Ani, Gada K.
    Fischer, Christopher J.
    Publisher
    American Physical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    ©2018 American Physical Society
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    Abstract
    Chromatin remodelers are molecular motors that play essential roles in the regulation of nucleosome positioning and chromatin accessibility. These machines couple the energy obtained from the binding and hydrolysis of ATP to the mechanical work of manipulating chromatin structure through processes that are not completely understood. Here we present a quantitative analysis of nucleosome repositioning by the imitation switch (ISWI) chromatin remodeler and demonstrate that nucleosome stability significantly impacts the observed activity. We show how DNA damage induced changes in the affinity of DNA wrapping within the nucleosome can affect ISWI repositioning activity and demonstrate how assay-dependent limitations can bias studies of nucleosome repositioning. Together, these results also suggest that some of the diversity seen in chromatin remodeler activity can be attributed to the variations in the thermodynamics of interactions between the remodeler, the histones, and the DNA, rather than reflect inherent properties of the remodeler itself.
    URI
    http://hdl.handle.net/1808/29813
    DOI
    https://doi.org/10.1103/PhysRevE.97.032422
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Aaron M. Morgan, Sarah E. LeGresley, Koan Briggs, Gada Al-Ani, and Christopher J. Fischer. Effects of Nucleosome Stability on Remodeler-Catalyzed Repositioning. Physical Review E, 97(2018).

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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