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Epigenetic Regulation

Epigenetic Regulation

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...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Histone Modification

Histone Modification

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.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...

Histone Modification

Histone Modification

Chromatin Immunoprecipitation- ChIP

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...

Inheritance of Chromatin Structures

Inheritance of Chromatin Structures

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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Related Experiment Video

Updated: Apr 14, 2026

High Sensitivity 5-hydroxymethylcytosine Detection in Balb/C Brain Tissue

High Sensitivity 5-hydroxymethylcytosine Detection in Balb/C Brain Tissue

Published on: February 1, 2011

Deciphering Epigenetic Cytosine Modifications by Direct Molecular Recognition.

Grzegorz Kubik¹, Daniel Summerer¹

¹Department of Chemistry, Zukunftskolleg, and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany.

ACS Chemical Biology

|April 22, 2015

Summary

New epigenetic marks like 5-hydroxymethylcytosine expand our understanding of gene regulation. Analytical methods are crucial for distinguishing these cytosine modifications and uncovering their biological roles.

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Last Updated: Apr 14, 2026

High Sensitivity 5-hydroxymethylcytosine Detection in Balb/C Brain Tissue

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Published on: February 1, 2011

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Rapid and Efficient Spatiotemporal Monitoring of Normal and Aberrant Cytosine Methylation within Intact Zebrafish Embryos

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Published on: August 18, 2022

Area of Science:

Epigenetics
Molecular Biology
Genomics

Background:

Cytosine modifications, beyond 5-methylcytosine (mC), including 5-hydroxymethyl-, 5-formyl-, and 5-carboxylcytosine, are newly discovered epigenetic marks.
These modifications are key intermediates in active mC demethylation and may possess distinct biological functions.

Purpose of the Study:

To review analytical techniques for deciphering epigenetic cytosine modifications.
To emphasize approaches based on direct molecular recognition of these modifications in DNA.

Main Methods:

Discussion of analytical strategies for differentiating cytosine 5-modifications.
Comparison of chemoselective conversions and selective molecular recognition events.
Focus on molecular recognition for profiling untreated DNA and single-cell analysis.

Main Results:

Chemoselective conversions are effective for in vitro genomic profiling.
Molecular recognition offers potential for simplified profiling of natural DNA.
Molecular recognition enables applications like single-cell analysis and in vivo monitoring.

Conclusions:

Accurate differentiation of cytosine 5-modifications is critical for understanding their roles.
Molecular recognition-based approaches present promising avenues for analyzing epigenetic modifications in various biological contexts.