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Related Concept Videos

Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

5.7K
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...
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Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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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...
6.5K
Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
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Epigenetic Regulation01:37

Epigenetic Regulation

3.1K
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...
3.1K
Euchromatin01:01

Euchromatin

7.2K
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...
7.2K
Heterochromatin02:38

Heterochromatin

14.3K
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...
14.3K

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Related Experiment Video

Updated: Sep 3, 2025

An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
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An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues

Published on: April 5, 2018

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Chromatin structure in cancer.

Meng Wang1, Benjamin D Sunkel1, William C Ray2,3

  • 1Center for Childhood Cancer and Blood Diseases, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, 43205, USA.

BMC Molecular and Cell Biology
|July 28, 2022
PubMed
Summary
This summary is machine-generated.

Altered chromosome structure can drive cancer development. Understanding these chromatin changes is key to diagnosing and treating rare cancers and other diseases.

Keywords:
Cancer epigeneticsChromatin imagingChromatin structureGenome sequencingSarcomaStructural variation

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CRISPR-Mediated Reorganization of Chromatin Loop Structure
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An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
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CRISPR-Mediated Reorganization of Chromatin Loop Structure
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Area of Science:

  • Genomics
  • Molecular Biology
  • Cancer Research

Background:

  • Sequence-based methods and in situ approaches are advancing our understanding of chromosome organization.
  • Recent single-molecule imaging reveals cell-to-cell variations in chromatin structure.
  • The link between chromatin structure and disease, particularly cancer, is an emerging area of study.

Purpose of the Study:

  • To investigate whether altered chromatin structure can drive tumorigenesis.
  • To explore the role of genome architecture disruptions in human cancer.
  • To understand chromatin-driven pathology in rare diseases and low mutational frequency cancers.

Main Methods:

  • Literature analysis of recent insights into genome architecture in human cancer.
  • Review of sequence-based methods and in situ approaches for chromosome organization.
  • Integration of findings from single-cell imaging and chromatin structural sequencing.

Main Results:

  • Multiple pathways, including structural variation, noncoding mutations, and metabolism, can disrupt chromatin structure.
  • Deregulation of genome structure is a characteristic of distinct classes of chromatin-driven tumors.
  • Cell-to-cell chromatin structural variation is evident, impacting disease understanding.

Conclusions:

  • Altered chromatin structure is a significant factor in tumorigenesis.
  • Understanding genome architecture is crucial for diagnosing and treating chromatin-driven diseases.
  • Integrating diverse imaging and sequencing data will clarify genome structure-function relationships in disease.