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Updated: Dec 22, 2025
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Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging
Published on: January 31, 2019
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The human telomeric nucleosome displays distinct structural and dynamic properties
Aghil Soman1, Chong Wai Liew2, Hsiang Ling Teo2
1School of Biological Sciences, Nanyang Technology University, 60 Nanyang Drive, Singapore 637551, Singapore.
Nucleic Acids Research
|May 7, 2020
Summary
Human telomeric nucleosomes, crucial for genomic integrity, were structurally and dynamically characterized. The study revealed a dynamic solution structure, offering insights into telomere function.
Area of Science:
- Molecular Biology
- Chromatin Biology
- Genomics
Background:
- Telomeres protect chromosome ends and are vital for genomic stability during cell division.
- The molecular-level structure and dynamics of telomeric chromatin remain incompletely understood.
Purpose of the Study:
- To elucidate the structure, dynamics, and solution properties of the human telomeric nucleosome.
- To gain molecular insights into telomeric DNA nucleosome and chromatin formation.
Main Methods:
- Determined the crystal structure of a human telomeric nucleosome core particle (NCP) at 2.2 Å resolution.
- Assessed the solution structure and dynamics of the telomeric nucleosome using biophysical methods.
Main Results:
- The crystal structure revealed a DNA helical path and symmetric stretching within the NCP, similar to the '601' NCP.
- In solution, telomeric nucleosomes displayed reduced stability and increased dynamics compared to NCPs with DNA positioning sequences.
Conclusions:
- The findings provide a molecular understanding of how telomeric DNA forms nucleosomes and chromatin.
- This research advances comprehension of the unique biological roles of telomeres in maintaining genomic integrity.
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