8eg8: Difference between revisions

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-'''Unreleased structure'''
-The entry 8eg8 is ON HOLD  until Paper Publication
+==Cryo-EM structure of consensus elemental paused elongation complex with a folded TL==
+<StructureSection load='8eg8' size='340' side='right'caption='[[8eg8]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[8eg8]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8EG8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8EG8 FirstGlance]. <br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1N7:CHAPSO'>1N7</scene>, <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=8eg8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8eg8 OCA], [https://pdbe.org/8eg8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8eg8 RCSB], [https://www.ebi.ac.uk/pdbsum/8eg8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8eg8 ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/RPOZ_ECO57 RPOZ_ECO57] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits (By similarity).
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Transcriptional pausing underpins the regulation of cellular RNA synthesis, but its mechanism remains incompletely understood. Sequence-specific interactions of DNA and RNA with the dynamic, multidomain RNA polymerase (RNAP) trigger reversible conformational changes at pause sites that temporarily interrupt the nucleotide addition cycle. These interactions initially rearrange the elongation complex (EC) into an elemental paused EC (ePEC). ePECs can form longer-lived PECs by further rearrangements or interactions of diffusible regulators. For both bacterial and mammalian RNAPs, a half-translocated state in which the next DNA template base fails to load into the active site appears central to the ePEC. Some RNAPs also swivel interconnected modules that may stabilize the ePEC. However, it is unclear whether swiveling and half-translocation are requisite features of a single ePEC state or if multiple ePEC states exist. Here, we use cryo-electron microscopy (cryo-EM) analysis of ePECs with different RNA-DNA sequences combined with biochemical probes of ePEC structure to define an interconverting ensemble of ePEC states. ePECs occupy either pre- or half-translocated states but do not always swivel, indicating that difficulty in forming the posttranslocated state at certain RNA-DNA sequences may be the essence of the ePEC. The existence of multiple ePEC conformations has broad implications for transcriptional regulation.
-Authors:
+An ensemble of interconverting conformations of the elemental paused transcription complex creates regulatory options.,Kang JY, Mishanina TV, Bao Y, Chen J, Llewellyn E, Liu J, Darst SA, Landick R Proc Natl Acad Sci U S A. 2023 Feb 21;120(8):e2215945120. doi: , 10.1073/pnas.2215945120. Epub 2023 Feb 16. PMID:36795753<ref>PMID:36795753</ref>
-Description:
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-[[Category: Unreleased Structures]]
+</div>
+<div class="pdbe-citations 8eg8" style="background-color:#fffaf0;"></div>
+== References ==
+<references/>
+__TOC__
+</StructureSection>
+[[Category: Escherichia coli]]
+[[Category: Large Structures]]
+[[Category: Chen J]]
+[[Category: Darst SA]]
+[[Category: Kang JY]]
+[[Category: Landick R]]
+[[Category: Llewellyn E]]