9tay: Difference between revisions
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==Structure of the human inner kinetochore CCAN bound to a di-CENP-A nucleosome== | |||
<StructureSection load='9tay' size='340' side='right'caption='[[9tay]], [[Resolution|resolution]] 15.50Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[9tay]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9TAY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9TAY 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]] 15.5Å</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=9tay FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9tay OCA], [https://pdbe.org/9tay PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9tay RCSB], [https://www.ebi.ac.uk/pdbsum/9tay PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9tay ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CENPH_HUMAN CENPH_HUMAN] Component of the CENPA-NAC (nucleosome-associated) complex, a complex that plays a central role in assembly of kinetochore proteins, mitotic progression and chromosome segregation. The CENPA-NAC complex recruits the CENPA-CAD (nucleosome distal) complex and may be involved in incorporation of newly synthesized CENPA into centromeres. Required for chromosome congression and efficiently align the chromosomes on a metaphase plate.<ref>PMID:14536089</ref> <ref>PMID:16875666</ref> <ref>PMID:18007590</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Human kinetochores assemble onto centromeric DNA comprising repetitive arrays of the 171 bp alpha-satellite sequence. To understand the higher-order architecture of the inner kinetochore assembled onto alpha-satellite arrays, we show cryo-EM structures of CCAN with free DNA, and alpha-satellite repeat monomers and dimers with CENP-A nucleosomes. CCAN bound to free DNA and a monomeric CENP-A nucleosome engages 70 bp of DNA comprising 30 bp of an upstream alpha-satellite repeat. This upstream DNA interacts with the histone-fold domain subunits of the CENP-TWSX module in a manner resembling how nucleosomes wrap DNA gyres. A complex of CCAN assembled onto a dimeric alpha-satellite repeat with two CENP-A nucleosomes shows that CCAN can only be accommodated on the linker DNA by unwrapping DNA from both the CENP-TWSX module and the upstream nucleosome. We discuss the implications of these results for models of CCAN assembly on arrays of alpha-satellite chromatin containing CENP-A nucleosomes. | |||
Models for the architecture of the human inner kinetochore on centromeric alpha-satellite CENP-A nucleosome arrays.,Yu C, Muir KW, Yang J, Zhang Z, McLaughlin SH, Barford D Nat Commun. 2026 May 12. doi: 10.1038/s41467-026-72856-0. PMID:42120391<ref>PMID:42120391</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 9tay" style="background-color:#fffaf0;"></div> | ||
[[Category: Barford | == References == | ||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Barford D]] | |||
[[Category: Yu C]] | |||
Latest revision as of 11:46, 24 May 2026
Structure of the human inner kinetochore CCAN bound to a di-CENP-A nucleosome
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