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Related Concept Videos

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.
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...
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,...
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...

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Related Experiment Video

Updated: Jun 6, 2026

Methylated DNA Immunoprecipitation
21:24

Methylated DNA Immunoprecipitation

Published on: January 2, 2009

Every methyl counts--epigenetic calculus.

Annette N D Scharf1, Axel Imhof

  • 1Adolf-Butenandt Institute and Munich Center of Integrated Protein Science (CIPSm), Ludwig Maximilians University of Munich, Munich, Germany.

FEBS Letters
|November 27, 2010
PubMed
Summary
This summary is machine-generated.

Histone methylation patterns form an epigenetic memory, maintaining cellular identity across generations. Understanding different methylation states is key to epigenetic inheritance.

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Area of Science:

  • Epigenetics and Molecular Biology
  • Cellular Biology

Background:

  • Histone modifications are crucial for epigenetic memory and cellular identity.
  • The histone code hypothesis suggests patterns are inherited, maintaining gene expression without transcription factors.
  • Histone methylation is vital, with associated enzyme mutations impacting cellular function.

Purpose of the Study:

  • To review recent data on the molecular functions of different histone methylation states.
  • To discuss the impact of histone methylation on epigenetic inheritance.

Main Methods:

  • Review of current scientific literature.
  • Analysis of recent experimental data on histone methylation.
  • Discussion of cellular physiology and epigenetic inheritance.

Main Results:

  • Different lysine methylation states (mono-, di-, tri-) have distinct, yet not fully understood, molecular functions.
  • Histone methylation patterns are critical for maintaining cellular identity and gene expression inheritance.
  • Enzymes regulating histone methylation are essential for cellular physiology.

Conclusions:

  • Further research into the specific roles of mono-, di-, and tri-methylation is needed.
  • Histone methylation is a fundamental mechanism for epigenetic inheritance.
  • Understanding histone methylation dynamics is crucial for comprehending cellular identity maintenance.