H3 H4 Tetramer
H3 H4 Tetramer - Related Videos
09:43
Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue
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Cited by 2 •
2018
The purpose of this article is to provide a comprehensive, systematic guide to the efficient purification of histones H3 and H4 and the quantification of acetylated histone residues.
07:24
A Protocol for the Production of KLRG1 Tetramer
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Cited by 2 •
2010
This protocol describes the production of KLRG1 tetramer, which is a powerful tool for the analysis of KLRG1 ligands.
13:58
Peptide:MHC Tetramer-based Enrichment of Epitope-specific T cells
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Cited by 28 •
2012
This protocol describes the use of peptide:MHC tetramers and magnetic microbeads to isolate low frequency populations of epitope-specific T cells and analyze them by flow cytometry. This method enables the direct study of endogenous T cell populations of interest from in vivo experimental systems.
03:17
Inheritance of Chromatin Structures
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2020
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...
15:42
Visualizing Antigen Specific CD4+ T Cells using MHC Class II Tetramers
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Cited by 28 •
2009
This procedure demonstrates the purification and in vitro expansion of antigen specific CD4+ T cells from whole peripheral blood and their visualization using MHC class II tetramers. Tetramers permit the direct visualization of T cells with a single antigen specificity and defined MHC class II restriction.
FAQs
Stability depends on several protein-protein interfaces rather than a single contact. The two H3 molecules interact with one another, while additional interactions help stabilize the H4 subunits within the assembled complex. These combined contacts allow the tetramer to persist as a coherent histone unit, which is important for its subsequent association with DNA during nucleosome formation.
After assembly, the tetramer associates with DNA as part of a nucleosome. This interaction contributes to genome packaging, but the resulting chromatin structure is not simply sealed away from cellular regulation. The balance between compaction and accessibility makes the complex relevant to processes that require regulatory access to DNA, including gene regulation and chromatin-state maintenance.
The tetrameric state joins two H3-H4 dimers through additional stabilizing contacts, creating a larger and more organized assembly intermediate. This organization matters because nucleosome construction depends on coordinated histone association with DNA, not only on isolated subunits. Studying the transition from dimers to the tetramer therefore helps clarify how stable chromatin architecture is established.
Their role in nucleosome assembly connects histone organization with the inheritance of chromatin states. During DNA replication, understanding how these complexes are deposited helps explain how chromatin features may be maintained as genetic material is copied. This relationship makes H3-H4 tetramers relevant to epigenetic memory, where regulatory states persist beyond a single round of DNA synthesis.
A focused investigation can examine the complex at several linked stages: formation of H3-H4 dimers, stabilization of the tetramer through protein interfaces, association with DNA, and participation in nucleosome assembly. Connecting these stages provides a more informative outcome than studying protein association alone, because it relates molecular structure to chromatin organization and regulatory accessibility.
Genome stability depends partly on how DNA is packaged and how chromatin is reorganized during cellular processes. Because H3-H4 tetramers contribute to nucleosome construction and are relevant to histone deposition during DNA replication, they provide a biochemical framework for examining how chromatin organization supports stable genome maintenance. Their study also links structural mechanisms with gene regulation and inherited chromatin states.