Related Experiment Video
Updated: May 20, 2026
06:32
Deciphering Molecular Mechanism of Histone Assembly by DNA Curtain Technique
Published on: March 9, 2022
SATB1-mediated functional packaging of chromatin into loops
Terumi Kohwi-Shigematsu1, Yoshinori Kohwi, Keiko Takahashi
1Life Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA. TKohwi-Shigematsu@lbl.gov
Methods (San Diego, Calif.)
|July 12, 2012
Summary
Chromatin looping, a key feature of genome organization, brings distant DNA regions together. New methods analyze protein-mediated chromatin interactions, using SATB1 as an example to understand gene regulation.
Area of Science:
- Genomics
- Molecular Biology
- Epigenetics
Background:
- Mammalian genomes exhibit complex higher-order chromatin structures.
- Chromatin looping is crucial for bringing distal genomic loci into proximity, impacting gene regulation.
- Fundamental questions remain regarding proteins, genomic marks, and mechanisms of chromatin folding.
Purpose of the Study:
- To describe methods for analyzing protein-mediated chromatin interactions.
- To investigate the role of specific nuclear proteins in chromatin folding and looping.
- To understand the functional consequences of distal genomic locus interactions.
Main Methods:
- Development and application of high-resolution methods to capture higher-order chromatin structures.
- Utilizing specific nuclear proteins as models for studying chromatin organization.
- Focusing on the global genome-organizer protein SATB1 as an example.
Main Results:
- Established methods for analyzing protein-mediated chromatin interactions.
- Demonstrated the role of SATB1 in mediating chromatin looping.
- Provided insights into the mechanisms of higher-order chromatin structure formation.
Conclusions:
- High-resolution methods are essential for studying protein-mediated chromatin interactions.
- SATB1 plays a significant role in organizing chromatin structure through looping.
- Further research is needed to fully elucidate the functional importance of chromatin looping in gene regulation.
Related Concept Videos
02:21Chromatin Packaging
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
02:21Chromatin Packaging
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
01:32Chromatin Packaging
Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
00:58DNA Packaging
Overview
00:58DNA Packaging
Overview
02:54Nucleosome Remodeling
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...