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Published on: January 14, 2016
Chromatin and the genome integrity network
Manolis Papamichos-Chronakis1, Craig L Peterson
1Institut Curie, Research Section, UMR218 CNRS, Nuclear Dynamics and Genome Plasticity, Pavillon Pasteur, 26 rue d'Ulm, 75248 Paris CEDEX 05, France.
Nature Reviews. Genetics
|December 19, 2012
Summary
Chromatin regulators are crucial for maintaining genome integrity by coordinating DNA repair and replication. These factors also play a novel role in preventing aneuploidy through chromosome segregation.
Area of Science:
- Molecular Biology
- Genetics
- Epigenetics
Background:
- Genome integrity is vital for organism survival and heredity.
- Genomic instability, leading to mutations and aberrations, arises from DNA damage, replication errors, or cell division defects.
- Chromatin regulators, influencing the epigenetic landscape, are increasingly recognized for their roles in genome maintenance.
Purpose of the Study:
- To review the functions of chromatin regulators in DNA damage repair and replication.
- To explore the emerging role of chromatin remodelers in chromosome segregation and aneuploidy prevention.
Main Methods:
- Literature review of recent research on chromatin regulation and genome integrity.
- Analysis of studies focusing on DNA repair pathways.
- Examination of research on DNA replication fidelity.
- Synthesis of evidence linking chromatin remodelers to chromosome segregation and aneuploidy.
Main Results:
- Chromatin regulators act as key coordinators and gatekeepers in DNA damage repair.
- These factors are essential for accurate DNA replication.
- Emerging evidence highlights their novel functions in ensuring proper chromosome segregation.
- Chromatin remodelers are implicated in preventing aneuploidy.
Conclusions:
- Chromatin regulators are central to maintaining genome integrity through diverse mechanisms.
- Their roles extend beyond DNA repair and replication to encompass chromosome segregation and aneuploidy prevention.
- Further research into chromatin regulation offers insights into preventing genetic instability and associated diseases.
Related Concept Videos
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...
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...
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...
02:35Chromatin 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...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...