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Related Concept Videos

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. 
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The 3-dimensional positioning of chromatin in the nucleus influences the...
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Chromatin Immunoprecipitation- ChIP02:36

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Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
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ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
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Nucleosome Remodeling02:54

Nucleosome Remodeling

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Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
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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.
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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Euchromatin01:01

Euchromatin

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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...
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Chromatin Packaging01:32

Chromatin Packaging

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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...
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Related Experiment Video

Updated: Sep 27, 2025

Chromatin Interaction Analysis with Paired-End Tag Sequencing ChIA-PET for Mapping Chromatin Interactions and Understanding Transcription Regulation
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Chromatin Interaction Analysis with Paired-End Tag Sequencing ChIA-PET for Mapping Chromatin Interactions and Understanding Transcription Regulation

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[RNA-Chromatin Interactome: What? Where? When?]

G K Ryabykh1,2,3, D E Mylarshchikov1, S V Kuznetsov4

  • 1Faculty of Bioengineering and Bioinformatics, Moscow State University, Moscow, 119234 Russia.

Molekuliarnaia Biologiia
|April 11, 2022
PubMed
Summary
This summary is machine-generated.

Chromatin-associated RNAs, particularly noncoding RNAs, play crucial roles in gene regulation. Modern methods now allow detailed study of these RNA-chromatin interactions and their impact on cellular functions.

Keywords:
RNA-chromatin interactomechromatinepigeneticsnoncoding RNAstranscription

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Last Updated: Sep 27, 2025

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High-Resolution Mapping of Protein-DNA Interactions in Mouse Stem Cell-Derived Neurons using Chromatin Immunoprecipitation-Exonuclease ChIP-Exo
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Area of Science:

  • Molecular Biology
  • Genetics
  • Epigenetics

Background:

  • Since the 1960s, a significant association between RNA and chromatin has been observed.
  • The precise nature, location, and function of these chromatin-associated RNAs remain areas of active investigation.

Purpose of the Study:

  • To review modern experimental and computational approaches for studying RNA-chromatin interactions.
  • To highlight the functional significance of noncoding RNAs in modulating chromatin architecture and gene expression.

Main Methods:

  • Genome-wide methods for mapping RNA-chromatin interactomes.
  • Techniques for analyzing interactions between individual RNAs and chromatin.
  • Data processing strategies for experimental results.

Main Results:

  • Advanced techniques enable comprehensive mapping of RNA-chromatin interactions.
  • Focus on noncoding RNAs reveals their close association with chromatin and associated protein complexes.
  • Biological examples demonstrate the regulatory roles of these RNAs.

Conclusions:

  • Chromatin-associated RNAs are integral to cellular system functions.
  • These RNAs fine-tune chromatin architecture, thereby altering gene expression levels.
  • Further research using these methods will elucidate the complex roles of RNA in epigenetics.