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Related Concept Videos

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...
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...
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...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin01:01

Euchromatin

The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...

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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
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Chromatin architecture defines the glucocorticoid response.

Craig J Burd1, Trevor K Archer

  • 1Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, United States.

Molecular and Cellular Endocrinology
|April 3, 2013
PubMed
Summary

The glucocorticoid receptor (GR) regulates genes by interacting with DNA. Chromatin structure is key to how GR functions differently in various cell types, a topic explored in recent research.

Keywords:
ChromatinGlucocorticoid receptorNuclear receptor

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Area of Science:

  • Molecular Biology
  • Genomics
  • Cell Biology

Background:

  • The glucocorticoid receptor (GR) controls numerous physiological processes.
  • GR's diverse roles are cell-type specific, despite widespread tissue expression.
  • Understanding GR regulation mechanisms is crucial for cell-specific functions.

Purpose of the Study:

  • To review recent advances in understanding GR specificity.
  • To highlight the role of chromatin structure in dictating GR function.
  • To elucidate mechanisms regulating cell-type specific GR actions.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of whole genome approaches related to GR.
  • Focus on studies investigating chromatin structure and GR interaction.

Main Results:

  • Recent studies reveal intricate details of GR diversity.
  • Chromatin structure plays a significant role in determining GR specificity.
  • Mechanisms of cell-type specific GR regulation are being elucidated.

Conclusions:

  • Chromatin structure is a critical determinant of glucocorticoid receptor (GR) specificity.
  • Advances in genomics are shedding light on the complex regulation of GR.
  • Further research into chromatin-mediated regulation will enhance understanding of GR's diverse physiological roles.