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Related Concept Videos

Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

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.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
Chromatin Packaging02:21

Chromatin Packaging

Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter? 
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
Chromatin Packaging01:32

Chromatin Packaging

Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
Chromatin Packaging02:21

Chromatin Packaging

Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter? 
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.

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Updated: May 13, 2026

Analyzing Telomeric Protein-DNA Interactions Using Single-Molecule Magnetic Tweezers
11:21

Analyzing Telomeric Protein-DNA Interactions Using Single-Molecule Magnetic Tweezers

Published on: August 30, 2024

Chromatin structure in telomere dynamics.

Alessandra Galati1, Emanuela Micheli, Stefano Cacchione

  • 1Dipartimento di Biologia e Biotecnologie, Istituto Pasteur - Fondazione Cenci Bolognetti, Sapienza Università di Roma Rome, Italy.

Frontiers in Oncology
|March 9, 2013
PubMed
Summary
This summary is machine-generated.

Telomeres protect chromosome ends, but shortening triggers cell aging. This review explores how chromatin modifications influence telomere function and cancer, highlighting knowledge gaps in telomere maintenance.

Keywords:
epigeneticstelomeretelomere dynamicstelomeric chromatin

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Area of Science:

  • Genetics and Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Telomeres are crucial nucleoprotein structures protecting chromosome ends from DNA damage recognition.
  • Critical telomere shortening induces replicative senescence via DNA damage response.
  • Telomere dysfunction is linked to genomic instability, cell transformation, and cancer development.

Purpose of the Study:

  • To review recent findings on chromatin modifications at telomeres.
  • To explore the dynamic changes in telomere states (protected vs. deprotected).
  • To elucidate the role of these modifications in telomere maintenance and function.

Main Methods:

  • Literature review of recent research on telomere chromatin.
  • Analysis of studies on chromatin modifications and telomere dynamics.
  • Synthesis of findings on the link between telomere state and function.

Main Results:

  • Chromatin modifications dynamically regulate telomere structure and function.
  • Changes in telomere chromatin are associated with transitions between protected and deprotected states.
  • Understanding these modifications is key to telomere maintenance and its role in aging and cancer.

Conclusions:

  • Chromatin modifications are central to telomere regulation.
  • Further research into telomere chromatin is essential for understanding cell turnover, aging, and cancer.
  • Targeting telomere chromatin may offer therapeutic strategies for cancer.