Modifications of H3 and H4 during chromatin replication, nucleosome assembly, and histone exchange

Laura J. Benson, Yongli Gu, Tatyana Yakovleva, Kevin Tong, Courtney Barrows, Christine L. Strack, Richard G. Cook, Craig Andrew Mizzen, Anthony T. Annunziato

Research output: Contribution to journalArticle

Abstract

Histone posttranslational modifications that accompany DNA replication, nucleosome assembly, and H2A/H2B exchange were examined in human tissue culture cells. Through microsequencing analysis and chromatin immunoprecipitation, it was found that a subset of newly synthesized H3.2/H3.3 is modified by acetylation and methylation at sites that correlate with transcriptional competence. Immunoprecipitation experiments suggest that cytosolic predeposition complexes purified from cells expressing FLAG-H4 contain H3/H4 dimers, not tetramers. Studies of the deposition of newly synthesized H2A/H2B onto replicating and nonreplicating chromatin demonstrated that H2A/H2B exchange takes place in chromatin regions that contain acetylated H4; however, there is no single pattern of H4 acetylation that accompanies exchange. H2A/H2B exchange is also largely independent of the deposition of replacement histone variant, H3.3. Finally, immunoprecipitation of nucleosomes replicated in the absence of de novo nucleosome assembly showed that histone modifications do not prevent the transfer of parental histones to newly replicated DNA and thus have the potential to serve as means of epigenetic inheritance. Our experiments provide an in-depth analysis of the "histone code" associated with chromatin replication and dynamic histone exchange in human cells.

Original languageEnglish (US)
Pages (from-to)9287-9296
Number of pages10
JournalJournal of Biological Chemistry
Volume281
Issue number14
DOIs
StatePublished - Apr 7 2006

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Histone Code
Nucleosomes
Histones
Chromatin
Acetylation
Immunoprecipitation
Chromatin Immunoprecipitation
Post Translational Protein Processing
DNA Replication
Epigenomics
Mental Competency
Methylation
Ion exchange
Cell Culture Techniques
Cells
Tissue culture
DNA
Dimers
Experiments

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Benson, L. J., Gu, Y., Yakovleva, T., Tong, K., Barrows, C., Strack, C. L., ... Annunziato, A. T. (2006). Modifications of H3 and H4 during chromatin replication, nucleosome assembly, and histone exchange. Journal of Biological Chemistry, 281(14), 9287-9296. https://doi.org/10.1074/jbc.M512956200

Modifications of H3 and H4 during chromatin replication, nucleosome assembly, and histone exchange. / Benson, Laura J.; Gu, Yongli; Yakovleva, Tatyana; Tong, Kevin; Barrows, Courtney; Strack, Christine L.; Cook, Richard G.; Mizzen, Craig Andrew; Annunziato, Anthony T.

In: Journal of Biological Chemistry, Vol. 281, No. 14, 07.04.2006, p. 9287-9296.

Research output: Contribution to journalArticle

Benson, LJ, Gu, Y, Yakovleva, T, Tong, K, Barrows, C, Strack, CL, Cook, RG, Mizzen, CA & Annunziato, AT 2006, 'Modifications of H3 and H4 during chromatin replication, nucleosome assembly, and histone exchange', Journal of Biological Chemistry, vol. 281, no. 14, pp. 9287-9296. https://doi.org/10.1074/jbc.M512956200
Benson, Laura J. ; Gu, Yongli ; Yakovleva, Tatyana ; Tong, Kevin ; Barrows, Courtney ; Strack, Christine L. ; Cook, Richard G. ; Mizzen, Craig Andrew ; Annunziato, Anthony T. / Modifications of H3 and H4 during chromatin replication, nucleosome assembly, and histone exchange. In: Journal of Biological Chemistry. 2006 ; Vol. 281, No. 14. pp. 9287-9296.
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