9uz7: Difference between revisions
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==Cryo-EM structure of the nucleosome core particle with site-specific DNA-histone crosslinking== | |||
<StructureSection load='9uz7' size='340' side='right'caption='[[9uz7]], [[Resolution|resolution]] 3.24Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[9uz7]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9UZ7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9UZ7 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]] 3.24Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=YCM:S-(2-AMINO-2-OXOETHYL)-L-CYSTEINE'>YCM</scene></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=9uz7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9uz7 OCA], [https://pdbe.org/9uz7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9uz7 RCSB], [https://www.ebi.ac.uk/pdbsum/9uz7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9uz7 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/H31_HUMAN H31_HUMAN] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
DNA-histone cross-links (DHCs) frequently arise within nucleosomes during DNA damage and repair processes. However, the functional consequences of DHC within nucleosomes remain largely unexplored. In this study, we prepared structurally homogeneous nucleosomes containing a single, site-specific DHC using click chemistry and systematically evaluated the impact of DHC on nucleosome structure and function. Our results show that DHC markedly enhances nucleosome thermal stability and completely blocks both thermally induced passive sliding and chromatin remodeler-mediated active sliding. Moreover, DHC obstructs SP6 RNA polymerase-driven transcription elongation through nucleosomes, leading to premature termination approximately 15 bp upstream of the cross-linking site. DHC also increases histone resistance to proteolytic digestion within nucleosomes. These findings suggest that even a single DHC can substantially lock and rigidify the nucleosome structure and broadly interfere with the recognition and processing of nucleosomes by various cellular machineries, thereby rendering DHC a highly toxic and persistent form of DNA damage. This in vitro study highlights the unique impact of DHC on nucleosome architecture and is expected to motivate further exploration of its biological roles in vivo. | |||
DNA - histone cross-link locks the nucleosome structure and disrupts its recognition and processing.,Shan X, Ji G, Li J, Ren M, Ma J, Zhou Y, Li H, Zhou C Protein Cell. 2025 Nov 5:pwaf094. doi: 10.1093/procel/pwaf094. PMID:41206067<ref>PMID:41206067</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 9uz7" style="background-color:#fffaf0;"></div> | ||
[[Category: Ji | == References == | ||
[[Category: Shan | <references/> | ||
[[Category: | __TOC__ | ||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Synthetic construct]] | |||
[[Category: Ji GY]] | |||
[[Category: Li HT]] | |||
[[Category: Shan XJ]] | |||
[[Category: Zhou CZ]] | |||
