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Related Concept Videos

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Inheritance of Chromatin Structures03:17

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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...
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Histone Modification02:32

Histone Modification

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
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Duplication of Chromatin Structure02:05

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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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Related Experiment Video

Updated: Nov 17, 2025

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images
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Structural dynamics of DNA depending on methylation pattern.

Takeru Kameda1,2, Miho M Suzuki3, Akinori Awazu4,5

  • 1Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan.

Physical Review. E
|February 19, 2021
PubMed
Summary
This summary is machine-generated.

DNA methylation alters DNA structure and flexibility, impacting gene expression. This study reveals how methylation changes DNA mechanics, crucial for epigenetic regulation.

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DNA Methylation: Bisulphite Modification and Analysis
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Enhanced Reduced Representation Bisulfite Sequencing for Assessment of DNA Methylation at Base Pair Resolution
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Area of Science:

  • Molecular Biology
  • Biophysics
  • Epigenetics

Background:

  • DNA methylation is vital for epigenetic regulation and gene expression.
  • Methylation is hypothesized to alter DNA mechanical properties, influencing biological processes.
  • Systematic investigation into methylation's structural and dynamic effects on DNA is lacking.

Purpose of the Study:

  • To elucidate the effects of DNA methylation on the structural and dynamic features of DNA.
  • To understand how methylation influences DNA mechanics at an atomic level.

Main Methods:

  • Fully atomic molecular dynamics simulations were employed.
  • Simulations included double-stranded DNA with various methylation patterns.
  • Analysis focused on base-step variables to assess DNA structural changes.

Main Results:

  • Methylation induced characteristic changes in local DNA flexibility.
  • Altered flexibility affected overall DNA geometry and stiffness.
  • Specific methylation patterns led to distinct mechanical property modifications.

Conclusions:

  • DNA methylation significantly impacts DNA mechanics, including local flexibility, geometry, and stiffness.
  • These methylation-dependent DNA dynamics are relevant to epigenetic regulation under physiological conditions.
  • Findings provide a foundation for understanding DNA's mechanical response to methylation.