Cited by 142Genomics and Chromatin DynamicsProtein Structure and DynamicsNuclear Structure and Function

Histone acetylation regulates chromatin accessibility: Role of H4K16 in inter-nucleosome interaction

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Zhang, Ruihan, Erler, Jochen, Langowski, Jörg·2017·Biophysical Journal

Abstract

The N-terminal tail of histone H4 is an indispensable mediator for inter-nucleosome interaction, which is required for chromatin fiber condensation. H4K16 acetylation (H4K16Ac) activates gene transcription by influencing both chromatin structure and interplay with nonhistone proteins. To understand the influence of H4K16Ac on inter-nucleosome interaction, we performed a simulation study for the H4 tail in the context of two nucleosomes in neighboring unit cells in the crystal structure. The binding conformation of H4 tail with/without K16Ac was sampled by replica exchange with solute tempering, and the free energy landscape was explored by metadynamics. The results indicate two important features of H4K16: 1) it is the first button to anchor the H4 tail on the adjacent nucleosome; and 2) it is the only acetylation site interacting with the acidic patch. H4K16Ac disrupts the electrostatic interactions of K16, weakens H4 tail-acidic patch binding, and significantly increases H4 tail conformation diversity. Our study suggests that H4K16Ac directly reduces the inter-nucleosome interaction mediated by the H4 tail, which might further encourage the binding of nonhistone proteins on the acidic patch.

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Crossref · 10.1016/j.bpj.2016.11.015

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  • Under physiological conditions, the balance between HDAC activity and histone acetylation shapes chromatin accessibility and thereby influences gene expression in the nervous system.

    “Under physiological conditions, the balance between HDAC activity and histone acetylation shapes chromatin accessibility and thereby influences gene expression in the nervous system (Zhang et al., 2017).”

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Authors
Zhang, R., Erler, J., & Langowski, J.
Affiliations
German Cancer Research Center (DE)
Corresponding author
Langowski, Jörg
Venue
Biophysical Journal
Publisher
Elsevier BV
Published
2017-02
Volume
112
Issue
3
Pages
450-459
ISSN
0006-3495 (ISSN-L)
OpenAlex
W2560656057
Cited by
142
References
55
Citations by year
2026: 9 · 2025: 15 · 2024: 12 · 2023: 8 · 2022: 14 · 2021: 14 · 2020: 23 · 2019: 26 · 2018: 16 · 2017: 5
FWCI
8.14
Type
journal article
Language
en
Open access
Locations
  • Biophysical Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HGS MathComp
  • DFG (GSC 220)
  • Boehringer Ingelheim Fonds
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
Keywords
histone acetylation, chromatin accessibility, nucleosome, acidic patch, electrostatic interactions, free energy landscape
MeSH terms
Acetylation, Histones, Hydrogen-Ion Concentration, Lysine, Models, Molecular, Nucleic Acid Conformation, Nucleosomes, Protein Structure, Quaternary, Protein Multimerization, Protein Stability

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