View source for 8s55


==RNA polymerase II early elongation complex bound to TFIIE and TFIIF - state a (composite structure)==
<StructureSection load='8s55' size='340' side='right'caption='[[8s55]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8s55]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8S55 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8S55 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]] 3.4&#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=8s55 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8s55 OCA], [https://pdbe.org/8s55 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8s55 RCSB], [https://www.ebi.ac.uk/pdbsum/8s55 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8s55 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A7M4DUC2_PIG A0A7M4DUC2_PIG] 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 ==
The transition from transcription initiation to elongation is highly regulated in human cells but remains incompletely understood at the structural level. In particular, it is unclear how interactions between RNA polymerase II (RNA Pol II) and initiation factors are broken to enable promoter escape. Here, we reconstitute RNA Pol II promoter escape in vitro and determine high-resolution structures of initially transcribing complexes containing 8-, 10-, and 12-nt ordered RNAs and two elongation complexes containing 14-nt RNAs. We suggest that promoter escape occurs in three major steps. First, the growing RNA displaces the B-reader element of the initiation factor TFIIB without evicting TFIIB. Second, the rewinding of the transcription bubble coincides with the eviction of TFIIA, TFIIB, and TBP. Third, the binding of DSIF and NELF facilitates TFIIE and TFIIH dissociation, establishing the paused elongation complex. This three-step model for promoter escape fills a gap in our understanding of the initiation-elongation transition of RNA Pol II transcription.

Three-step mechanism of promoter escape by RNA polymerase II.,Zhan Y, Grabbe F, Oberbeckmann E, Dienemann C, Cramer P Mol Cell. 2024 May 2;84(9):1699-1710.e6. doi: 10.1016/j.molcel.2024.03.016. Epub , 2024 Apr 10. PMID:38604172<ref>PMID:38604172</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8s55" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sus scrofa]]
[[Category: Cramer P]]
[[Category: Dienemann C]]
[[Category: Grabbe F]]
[[Category: Oberbeckmann E]]
[[Category: Zhan Y]]