Related Experiment Video
Updated: Aug 2, 2026
09:26
Chromatin Extraction from Frozen Chimeric Liver Tissue for Chromatin Immunoprecipitation Analysis
Published on: March 23, 2021
Hanging on to histones. Chromatin
1Laboratory of Molecular Embryology, National Institute of Child Health and Human Development, Building 6, Room B1A13, National Institutes of Health, Bethesda, Maryland 20892-2710, USA.
Current Biology : CB
|March 1, 1996
Summary
Regulatory proteins selectively recognize core histones to control gene transcription. This highlights how eukaryotic transcription machinery adapts to the chromosomal environment.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Gene transcription is a fundamental process in eukaryotes.
- The chromosomal environment, including histones, presents unique challenges for transcription.
- Regulatory proteins play a crucial role in modulating gene expression.
Purpose of the Study:
- To investigate the role of specific histone recognition in transcriptional control.
- To elucidate how regulatory proteins interact with core histones.
- To understand the adaptation of eukaryotic transcription machinery to chromatin.
Main Methods:
- Analysis of protein-DNA interactions.
- Biochemical assays for histone recognition.
- Studies on promoter activity in vitro and in vivo.
Main Results:
- Demonstrated highly selective recognition of individual core histones by regulatory proteins.
- Identified specific recognition mechanisms involved in transcriptional control.
- Provided evidence for the adaptation of transcription machinery to the chromosomal context.
Conclusions:
- Selective histone recognition by regulatory proteins is a key mechanism for transcriptional control.
- This mechanism allows eukaryotic transcription to function effectively within the chromatin environment.
Related Concept Videos
02:25Spreading of Chromatin Modifications
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer is an enzyme that can...
Writers
The writer is an enzyme that can...
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...
02:38Heterochromatin
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...
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...