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Related Concept Videos

Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
Epigenetic Regulation01:37

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 Regulation01:46

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 Inheritance02:30

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 Structures03:17

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...
Histone Modification02:32

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 27, 2026

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images
09:42

Immunostaining for DNA Modifications: Computational Analysis of Confocal Images

Published on: September 7, 2017

Guiding DNA methylation.

Alexander Meissner1

  • 1Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA. alexander_meissner@harvard.edu

Cell Stem Cell
|November 8, 2011
PubMed
Summary
This summary is machine-generated.

Methylation-determining regions (MDRs) can establish cell-type-specific DNA methylation patterns. These regions within promoters are sufficient to control endogenous methylation dynamics, clarifying epigenetic pattern formation.

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Genomics

Background:

  • Cell-type-specific epigenetic patterns are crucial for cellular identity and function.
  • DNA methyltransferases (DNMTs) are key enzymes in establishing these patterns.
  • The precise mechanisms by which DNMTs achieve target specificity remain largely unknown.

Discussion:

  • This study investigates the role of methylation-determining regions (MDRs) in controlling DNA methylation patterns.
  • Researchers examined whether specific DNA sequences within promoter regions could dictate methylation.
  • The findings explore the sufficiency of MDRs in recapitulating endogenous methylation dynamics.

Key Insights:

  • Methylation-determining regions (MDRs) located in promoter areas are sufficient to establish cell-type-specific DNA methylation patterns.
  • These MDRs effectively recapitulate the endogenous patterns and dynamics of DNA methylation.
  • This provides a mechanistic insight into how epigenetic information is maintained across cell types.

Outlook:

  • Further research can explore the sequence features within MDRs that confer specificity.
  • Understanding MDRs could lead to novel therapeutic strategies for epigenetic dysregulation.
  • Investigating MDRs in different genomic contexts will broaden our understanding of epigenetic regulation.