6FQ8
Class 3 : translocated nucleosome
Summary for 6FQ8
| Entry DOI | 10.2210/pdb6fq8/pdb |
| EMDB information | 4297 4299 4299 |
| Descriptor | Histone H3.3C, Histone H4, Histone H2A, ... (6 entities in total) |
| Functional Keywords | nucleosome, cryo em, nucleosome sliding, chromatin remodeling, gene regulation |
| Biological source | Xenopus laevis (African clawed frog) More |
| Total number of polymer chains | 10 |
| Total formula weight | 179028.77 |
| Authors | Bilokapic, S.,Halic, M. (deposition date: 2018-02-13, release date: 2018-04-18, Last modification date: 2024-05-15) |
| Primary citation | Bilokapic, S.,Strauss, M.,Halic, M. Structural rearrangements of the histone octamer translocate DNA. Nat Commun, 9:1330-1330, 2018 Cited by PubMed Abstract: Nucleosomes, the basic unit of chromatin, package and regulate expression of eukaryotic genomes. Nucleosomes are highly dynamic and are remodeled with the help of ATP-dependent remodeling factors. Yet, the mechanism of DNA translocation around the histone octamer is poorly understood. In this study, we present several nucleosome structures showing histone proteins and DNA in different organizational states. We observe that the histone octamer undergoes conformational changes that distort the overall nucleosome structure. As such, rearrangements in the histone core α-helices and DNA induce strain that distorts and moves DNA at SHL 2. Distortion of the nucleosome structure detaches histone α-helices from the DNA, leading to their rearrangement and DNA translocation. Biochemical assays show that cross-linked histone octamers are immobilized on DNA, indicating that structural changes in the octamer move DNA. This intrinsic plasticity of the nucleosome is exploited by chromatin remodelers and might be used by other chromatin machineries. PubMed: 29626188DOI: 10.1038/s41467-018-03677-z PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (4.8 Å) |
Structure validation
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