Related Experiment Video
Updated: Jun 4, 2026
09:13
Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates
Published on: May 12, 2023
Chromatin higher-order structures and gene regulation.
1National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, People's Republic of China.
Current Opinion in Genetics & Development
|February 24, 2011
Summary
This review details the structure of the 30-nm chromatin fiber, exploring its dynamics, epigenetic inheritance, and role in gene regulation. Understanding chromatin organization is key to eukaryotic gene expression.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Eukaryotic genomic DNA is packaged into chromatin by histones.
- Higher-order chromatin compaction is vital for DNA processes like transcription.
- Factors like histone modifications and proteins influence chromatin structure.
Purpose of the Study:
- To review recent advancements in understanding the 30-nm chromatin fiber structure.
- To discuss the plasticity, dynamics, and epigenetic inheritance of higher-order chromatin.
- To explore the role of chromatin higher-order organization in eukaryotic gene regulation.
Main Methods:
- Literature review of recent studies on chromatin structure.
- Analysis of factors regulating chromatin organization.
- Discussion of experimental and theoretical models for chromatin fibers.
Main Results:
- While nucleosome structure is known, higher-order chromatin structure remains under investigation.
- Recent progress has been made in elucidating the 30-nm chromatin fiber.
- Structural plasticity and epigenetic inheritance are key aspects of higher-order chromatin.
Conclusions:
- The 30-nm chromatin fiber's structure and dynamics are crucial for gene regulation.
- Further research is needed to fully understand higher-order chromatin organization.
- Chromatin higher-order structure plays a significant role in eukaryotic gene expression.
Related Concept Videos
02:05Duplication of Chromatin Structure
The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
02:38Heterochromatin
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...
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...
02:38Heterochromatin
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...
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...
02:41Chromatin Structure Regulates pre-mRNA Processing
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
01:01Euchromatin
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...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
01:01Euchromatin
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...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...