Download MendeleyHigh-Resolution Cryo-EM Analyses of Nucleosomes.
Takizawa, Y., Ho, C.H., Sato, S., Danev, R., Kurumizaka, H.(2025) Methods Mol Biol 2919: 91-107
- PubMed: 40257559 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.1007/978-1-0716-4486-7_6
- Primary Citation Related Structures:
7VZ4 - PubMed Abstract:
The fundamental chromatin unit is the nucleosome, in which approximately 150 base pairs of DNA are bound to the surface of a symmetric histone octamer containing 2 copies each of histones H2A, H2B, H3, and H4. Over the years, numerous structures of nucleosomes have been determined by X-ray crystallography. However, their structural and functional versatility may not have been fully revealed, due to crystal packing effects. Various structures of nucleosomes and their complexes with nucleosome-binding proteins are now being determined by cryo-electron microscopy (cryo-EM) single-particle analysis, allowing the visualization of their structural diversity. In this report, we present a method for high-resolution structural analyses of nucleosomes by cryo-EM and describe the detailed procedures for nucleosome purification, cryo-EM grid preparation, data collection, and data processing. This method can serve as a good starting point for cryo-EM investigations of nucleosomes and their wide range of complexes.
- Laboratory of Chromatin Structure and Function, Institute for Quantitative Biosciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
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