8UA7
Medusavirus Nucleosome Core Particle
Summary for 8UA7
| Entry DOI | 10.2210/pdb8ua7/pdb |
| EMDB information | 42053 |
| Descriptor | Histone H3, Histone H4, Histone H2A, ... (6 entities in total) |
| Functional Keywords | dna protein complex, nucleosome, giant virus, ncldv, dna binding protein, dna binding protein-dna complex, dna binding protein/dna |
| Biological source | Medusavirus More |
| Total number of polymer chains | 10 |
| Total formula weight | 303178.51 |
| Authors | Toner, C.M.,Hoitsma, N.M.,Weerawarana, S.,Luger, K. (deposition date: 2023-09-20, release date: 2024-10-30, Last modification date: 2024-11-06) |
| Primary citation | Toner, C.M.,Hoitsma, N.M.,Weerawarana, S.,Luger, K. Characterization of Medusavirus encoded histones reveals nucleosome-like structures and a unique linker histone. Nat Commun, 15:9138-9138, 2024 Cited by PubMed Abstract: The organization of DNA into nucleosomes is a ubiquitous and ancestral feature that was once thought to be exclusive to the eukaryotic domain of life. Intriguingly, several representatives of the Nucleocytoplasmic Large DNA Viruses (NCLDV) encode histone-like proteins that in Melbournevirus were shown to form nucleosome-like particles. Medusavirus medusae (MM), a distantly related giant virus, encodes all four core histone proteins and, unique amongst most giant viruses, a putative acidic protein with two domains resembling eukaryotic linker histone H1. Here, we report the structure of nucleosomes assembled with MM histones and highlight similarities and differences with eukaryotic and Melbournevirus nucleosomes. Our structure provides insight into how variations in histone tail and loop lengths are accommodated within the context of the nucleosome. We show that MM-histones assemble into tri-nucleosome arrays, and that the putative linker histone H1 does not function in chromatin compaction. These findings expand our limited understanding of chromatin organization by virus-encoded histones. PubMed: 39443461DOI: 10.1038/s41467-024-53364-5 PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (3.3 Å) |
Structure validation
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