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Related Concept Videos

Histone Variants at the Centromere02:30

Histone Variants at the Centromere

Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer is an enzyme that can...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Heterochromatin02:38

Heterochromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Heterochromatin02:38

Heterochromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...

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Related Experiment Video

Updated: Jun 22, 2026

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
05:35

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

Published on: March 3, 2016

A reader for centromeric chromatin.

Nikolina Sekulic, Ben E Black

    Nature Cell Biology
    |July 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Centromere protein N (CENP-N) acts as a crucial epigenetic mark reader. It physically recognizes the mark generated by CENP-A histone variant incorporation in centromeric nucleosomes for epigenetic information transmission.

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    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
    05:35

    Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

    Published on: March 3, 2016

    Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
    09:32

    Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

    Published on: October 14, 2022

    A Multilabel Single Molecule Localization Microscopy Protocol for Investigation of Chromatin in the Dense Nuclear Environment
    08:49

    A Multilabel Single Molecule Localization Microscopy Protocol for Investigation of Chromatin in the Dense Nuclear Environment

    Published on: June 5, 2026

    Area of Science:

    • Epigenetics
    • Molecular Biology
    • Chromatin Biology

    Background:

    • Epigenetic information relies on physical recognition of marks by 'reader' proteins.
    • Centromeric nucleosomes are specified by the histone H3 variant CENP-A.

    Discussion:

    • CENP-N functions as the reader for the centromere-specifying epigenetic mark.
    • This recognition is essential for the transmission of epigenetic information during cell division.

    Key Insights:

    • Identification of CENP-N as a direct reader of the CENP-A epigenetic mark.
    • Establishes a molecular mechanism for centromere identity maintenance.

    Outlook:

    • Further investigation into CENP-N interactions and regulatory mechanisms.
    • Potential therapeutic targets for epigenetic disorders affecting centromere function.