View source for 8syp


==Genomic CX3CR1 nucleosome==
<StructureSection load='8syp' size='340' side='right'caption='[[8syp]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8syp]] is a 12 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=8SYP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8SYP 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]] 2.6&#8491;</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=8syp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8syp OCA], [https://pdbe.org/8syp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8syp RCSB], [https://www.ebi.ac.uk/pdbsum/8syp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8syp ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Pioneer transcription factors are vital for cell fate changes. PU.1 and C/EBPalpha work together to regulate hematopoietic stem cell differentiation. However, how they recognize in vivo nucleosomal DNA targets remains elusive. Here we report the structures of the nucleosome containing the mouse genomic CX3CR1 enhancer DNA and its complexes with PU.1 alone and with both PU.1 and the C/EBPalpha DNA binding domain. Our structures reveal that PU.1 binds the DNA motif at the exit linker, shifting 17 bp of DNA into the core region through interactions with H2A, unwrapping ~20 bp of nucleosomal DNA. C/EBPalpha binding, aided by PU.1's repositioning, unwraps ~25 bp of entry DNA. The PU.1 Q218H mutation, linked to acute myeloid leukemia, disrupts PU.1-H2A interactions. PU.1 and C/EBPalpha jointly displace linker histone H1 and open the H1-condensed nucleosome array. Our study unveils how two pioneer factors can work cooperatively to open closed chromatin by altering DNA positioning in the nucleosome.

Structural mechanism of synergistic targeting of the CX3CR1 nucleosome by PU.1 and C/EBPalpha.,Lian T, Guan R, Zhou BR, Bai Y Nat Struct Mol Biol. 2024 Apr;31(4):633-643. doi: 10.1038/s41594-023-01189-z. , Epub 2024 Jan 24. PMID:38267599<ref>PMID:38267599</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8syp" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Bai Y]]
[[Category: Guan R]]
[[Category: Lian T]]