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==Cryo-EM structure of a chromatosome containing human linker histone H1.0== | |||
<StructureSection load='7k5x' size='340' side='right'caption='[[7k5x]], [[Resolution|resolution]] 2.93Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[7k5x]] is a 13 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7K5X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7K5X FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.93Å</td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7k5x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7k5x OCA], [https://pdbe.org/7k5x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7k5x RCSB], [https://www.ebi.ac.uk/pdbsum/7k5x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7k5x ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The repeating structural unit of metazoan chromatin is the chromatosome, a nucleosome bound to a linker histone, H1. There are 11 human H1 isoforms with diverse cellular functions, but how they interact with the nucleosome remains elusive. Here, we determined the cryoelectron microscopy (cryo-EM) structures of chromatosomes containing 197 bp DNA and three different human H1 isoforms, respectively. The globular domains of all three H1 isoforms bound to the nucleosome dyad. However, the flanking/linker DNAs displayed substantial distinct dynamic conformations. Nuclear magnetic resonance (NMR) and H1 tail-swapping cryo-EM experiments revealed that the C-terminal tails of the H1 isoforms mainly controlled the flanking DNA orientations. We also observed partial ordering of the core histone H2A C-terminal and H3 N-terminal tails in the chromatosomes. Our results provide insights into the structures and dynamics of the chromatosomes and have implications for the structure and function of chromatin. | |||
Distinct Structures and Dynamics of Chromatosomes with Different Human Linker Histone Isoforms.,Zhou BR, Feng H, Kale S, Fox T, Khant H, de Val N, Ghirlando R, Panchenko AR, Bai Y Mol Cell. 2021 Jan 7;81(1):166-182.e6. doi: 10.1016/j.molcel.2020.10.038. Epub , 2020 Nov 24. PMID:33238161<ref>PMID:33238161</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 7k5x" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Antibody 3D structures|Antibody 3D structures]] | |||
*[[Histone 3D structures|Histone 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | |||
[[Category: Bai Y]] | |||
[[Category: Zhou B-R]] |