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Related Concept Videos

Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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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...
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Chromosome Structure02:40

Chromosome Structure

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A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
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Chromosome Structure02:40

Chromosome Structure

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Centrioles and Centrosomes01:13

Centrioles and Centrosomes

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Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
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Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

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The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
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Attachment of Sister Chromatids02:57

Attachment of Sister Chromatids

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As cells progress into mitosis, the nuclear envelope breaks down, and the condensed chromosomes are exposed to the array of bipolar microtubules of the mitotic spindle. The kinetochore, a large, disc-shaped protein complex, is present at the centromere region of the sister chromatids and acts as a binding site for the microtubules.  Usually, the plus-end of a single microtubule is embedded within the kinetochore. However, some kinetochores first establish lateral contact with the side-wall...
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Related Experiment Video

Updated: Dec 28, 2025

Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
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Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins

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Centromere chromatin structure - Lessons from neocentromeres.

Catherine Naughton1, Nick Gilbert1

  • 1Medical Research Council Human Genetics Unit, Institute of Genetics and Molecular Medicine, The University of Edinburgh, Edinburgh, UK.

Experimental Cell Research
|February 12, 2020
PubMed
Summary
This summary is machine-generated.

Neocentromeres, formed on unique DNA, offer insights into centromere structure. Studying these specialized genomic regions advances understanding of genome stability during cell division.

Keywords:
CentromereChromatinNeocentromereα-satellite

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Area of Science:

  • Genetics
  • Molecular Biology
  • Epigenetics

Background:

  • Centromeres are crucial for genome stability during mitosis.
  • Native centromeric chromatin structure is difficult to study due to repetitive DNA sequences.
  • Neocentromeres provide a unique model for investigating centromeric chromatin.

Purpose of the Study:

  • To review findings from neocentromere studies.
  • To elucidate the structure of canonical centromeric chromatin.
  • To understand how neocentromeres inform about centromere function.

Main Methods:

  • Literature review of independent neocentromere studies.
  • Analysis of findings related to centromeric chromatin structure.
  • Comparative analysis between neocentromeres and native centromeres.

Main Results:

  • Neocentromere studies have revealed key aspects of centromeric chromatin.
  • Insights into the DNA sequence and epigenetic modifications at centromeres.
  • Understanding the role of specific proteins in centromere formation and function.

Conclusions:

  • Neocentromeres are valuable models for studying centromeric chromatin structure.
  • Research on neocentromeres significantly advances knowledge of genome stability mechanisms.
  • This review consolidates findings, highlighting progress in understanding canonical centromeres.