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Title: In silico evidence for sequence-dependent nucleosome sliding

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1];  [2];  [3]
  1. Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637,
  2. Laboratory for Molecular and Computational Genomics, Department of Chemistry, University of Wisconsin–Madison, Madison, WI 53706,, Laboratory of Genetics, University of Wisconsin–Madison, Madison, WI 53706,, UW-Biotechnology Center, University of Wisconsin–Madison, Madison, WI 53706,
  3. Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637,, Materials Science Division, Argonne National Laboratory, Argonne, IL 60439

Nucleosomes represent the basic building block of chromatin and provide an important mechanism by which cellular processes are controlled. The locations of nucleosomes across the genome are not random but instead depend on both the underlying DNA sequence and the dynamic action of other proteins within the nucleus. Furthermore, these processes are central to cellular function, and the molecular details of the interplay between DNA sequence and nudeosome dynamics remain poorly understood. In this work, we investigate this interplay in detail by relying on a molecular model, which permits development of a comprehensive picture of the underlying free energy surfaces and the corresponding dynamics of nudeosome repositioning. The mechanism of nudeosome repositioning is shown to be strongly linked to DNA sequence and directly related to the binding energy of a given DNA sequence to the histone core. It is also demonstrated that chromatin remodelers can override DNA-sequence preferences by exerting torque, and the histone H4 tail is then identified as a key component by which DNA-sequence, histone modifications, and chromatin remodelers could in fact be coupled.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; US Department of Commerce; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Midwest Integrated Center for Computational Materials (MICCoM); National Institutes of Health (NIH), National Human Genome Research Institute (NHGRI); National Institute of Standards and Technology (NIST), Center for Hierarchical Materials Design (CHiMaD)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1400015
Alternate ID(s):
OSTI ID: 1419955
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Vol. 114 Journal Issue: 44; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 46 works
Citation information provided by
Web of Science

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