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Related Concept Videos

Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

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.
Types of ChIP
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...
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer is an enzyme that can...
Nucleosome Remodeling02:54

Nucleosome Remodeling

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...
Heterochromatin02:38

Heterochromatin

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 9th...
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...
Combinatorial Gene Control02:33

Combinatorial Gene Control

Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...

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Related Experiment Video

Updated: May 27, 2026

Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

Associated Chromosome Trap for Identifying Long-range DNA Interactions

Published on: April 23, 2011

Uncovering combinatorial interactions in chromatin.

Ian C Wood1

  • 1Institute of Membrane & Systems Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK. i.c.wood@leeds.ac.uk

Epigenomics
|November 30, 2011
PubMed
Summary
This summary is machine-generated.

DNA packaging involves histone proteins forming nucleosomes, a platform for cellular function. Understanding how multiple histone modifications work together is crucial for cell biology research.

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

Published on: April 30, 2012

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
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Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

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Related Experiment Videos

Last Updated: May 27, 2026

Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

Associated Chromosome Trap for Identifying Long-range DNA Interactions

Published on: April 23, 2011

Chromatin Interaction Analysis with Paired-End Tag Sequencing (ChIA-PET) for Mapping Chromatin Interactions and Understanding Transcription Regulation
21:55

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

Published on: April 30, 2012

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
09:32

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C

Published on: October 14, 2022

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • DNA is organized around histone proteins into nucleosomes, facilitating genome packaging.
  • Histone post-translational modifications play crucial roles in cellular processes like DNA repair, replication, and gene transcription.
  • The functional interplay between different histone modifications remains largely unexplored.

Purpose of the Study:

  • To investigate the combinatorial effects of multiple histone modifications.
  • To understand how cells interpret complex patterns of histone marks.

Main Methods:

  • Utilizing advanced quantitative proteomics techniques.
  • Leveraging large-scale genomic data from high-throughput studies.

Main Results:

  • Emerging insights into the cellular interpretation of combined histone modifications.
  • New understanding of how multiple marks influence cellular functions.

Conclusions:

  • Quantitative proteomics and genomics are advancing our knowledge of histone modification crosstalk.
  • Further research is needed to fully elucidate the functional consequences of combinatorial histone marks.