View source for 7xti


==RNA polymerase II elongation complex transcribing a nucleosome (EC58hex)==
<StructureSection load='7xti' size='340' side='right'caption='[[7xti]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7xti]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Komagataella_phaffii Komagataella phaffii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7XTI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7XTI 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]] 3.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=7xti FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7xti OCA], [https://pdbe.org/7xti PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7xti RCSB], [https://www.ebi.ac.uk/pdbsum/7xti PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7xti ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C4R4Y0_KOMPG C4R4Y0_KOMPG] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[RuleBase:RU004279]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
During gene transcription, RNA polymerase II (RNAPII) traverses nucleosomes in chromatin, but the mechanism has remained elusive. Using cryo-electron microscopy, we obtained structures of the RNAPII elongation complex (EC) passing through a nucleosome in the presence of the transcription elongation factors Spt6, Spn1, Elf1, Spt4/5, and Paf1C and the histone chaperone FACT (facilitates chromatin transcription). The structures show snapshots of EC progression on DNA mediating downstream nucleosome disassembly, followed by its reassembly upstream of the EC, which is facilitated by FACT. FACT dynamically adapts to successively occurring subnucleosome intermediates, forming an interface with the EC. Spt6, Spt4/5, and Paf1C form a "cradle" at the EC DNA-exit site and support the upstream nucleosome reassembly. These structures explain the mechanism by which the EC traverses nucleosomes while maintaining the chromatin structure and epigenetic information.

Structural basis of nucleosome disassembly and reassembly by RNAPII elongation complex with FACT.,Ehara H, Kujirai T, Shirouzu M, Kurumizaka H, Sekine SI Science. 2022 Sep 9;377(6611):eabp9466. doi: 10.1126/science.abp9466. Epub 2022 , Aug 18. PMID:35981082<ref>PMID:35981082</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7xti" style="background-color:#fffaf0;"></div>

==See Also==
*[[RNA polymerase 3D structures|RNA polymerase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Komagataella phaffii]]
[[Category: Large Structures]]
[[Category: Ehara H]]
[[Category: Kujirai T]]
[[Category: Kurumizaka H]]
[[Category: Sekine S]]
[[Category: Shirouzu M]]