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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.

Genomic Imprinting and Inheritance

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

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 DNA...

Position-effect Variegation

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

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 deacetylase,...

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Related Experiment Video

Updated: May 18, 2026

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

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

Published on: August 18, 2022

[DNA methylation in vertebrate embryogenesis].

Xiao-Dan Yang¹, Wei Han, Feng Liu

¹School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang 110016, China. yangxiaodan333@163.com

Yi Chuan = Hereditas

|September 29, 2012

Summary

This summary is machine-generated.

DNA methylation is crucial for vertebrate development, controlling gene expression during embryogenesis and organogenesis. Disrupting DNA methyltransferases (Dnmt) genes leads to developmental defects in mice and zebrafish.

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Immunostaining for DNA Modifications: Computational Analysis of Confocal Images

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images

Published on: September 7, 2017

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Last Updated: May 18, 2026

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

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

Published on: August 18, 2022

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images

Published on: September 7, 2017

Area of Science:

Epigenetics and Developmental Biology
Molecular Biology

Context:

DNA methylation is a key epigenetic mechanism regulating gene expression.
Vertebrate early embryogenesis and organogenesis rely on DNA methylation.
Dnmt gene function is critical for normal development.

Purpose:

To summarize the dynamic expression of DNA methyltransferases (Dnmt) genes.
To elucidate the roles of DNA methylation in vertebrate embryogenesis and organogenesis.
To explore the interplay between DNA methylation and histone modifications in gene regulation.

Summary:

This review details the expression patterns of Dnmt genes during vertebrate development.
It highlights the essential roles of DNA methylation in controlling cell fate, differentiation, and organogenesis in mice and zebrafish.
The paper examines the cooperative regulation of gene transcription by DNA methylation and histone modifications.

Impact:

Advances understanding of DNA methylation's role in vertebrate embryogenesis.
Provides insights into potential therapeutic strategies for DNA methylation-related human diseases.
Offers a foundation for further research into epigenetic regulation during development.