6psv: Difference between revisions

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-'''Unreleased structure'''
-The entry 6psv is ON HOLD  until Paper Publication
+==Escherichia coli RNA polymerase promoter unwinding intermediate (TpreRPo) with TraR and rpsT P2 promoter==
+<StructureSection load='6psv' size='340' side='right'caption='[[6psv]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[6psv]] is a 10 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PSV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6PSV FirstGlance]. <br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><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='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_RNA_polymerase DNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.6 2.7.7.6] </span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6psv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6psv OCA], [http://pdbe.org/6psv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6psv RCSB], [http://www.ebi.ac.uk/pdbsum/6psv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6psv ProSAT]</span></td></tr>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/Q0P6L9_ECOLX Q0P6L9_ECOLX]] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the primary sigma factor during exponential growth.[HAMAP-Rule:MF_00963][SAAS:SAAS00535554] [[http://www.uniprot.org/uniprot/RPOB_ECO57 RPOB_ECO57]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [[http://www.uniprot.org/uniprot/RPOA_ECOLI RPOA_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. This subunit plays an important role in subunit assembly since its dimerization is the first step in the sequential assembly of subunits to form the holoenzyme.[HAMAP-Rule:MF_00059] [[http://www.uniprot.org/uniprot/RPOC_ECOLI RPOC_ECOLI]] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322] [[http://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 ==
+Transcription initiation requires formation of the open promoter complex (RPo). To generate RPo, RNA polymerase (RNAP) unwinds the DNA duplex to form the transcription bubble and loads the DNA into the RNAP active site. RPo formation is a multi-step process with transient intermediates of unknown structure. We use single-particle cryoelectron microscopy to visualize seven intermediates containing Escherichia coli RNAP with the transcription factor TraR en route to forming RPo. The structures span the RPo formation pathway from initial recognition of the duplex promoter in a closed complex to the final RPo. The structures and supporting biochemical data define RNAP and promoter DNA conformational changes that delineate steps on the pathway, including previously undetected transient promoter-RNAP interactions that contribute to populating the intermediates but do not occur in RPo. Our work provides a structural basis for understanding RPo formation and its regulation, a major checkpoint in gene expression throughout evolution.
-Authors:
+Stepwise Promoter Melting by Bacterial RNA Polymerase.,Chen J, Chiu C, Gopalkrishnan S, Chen AY, Olinares PDB, Saecker RM, Winkelman JT, Maloney MF, Chait BT, Ross W, Gourse RL, Campbell EA, Darst SA Mol Cell. 2020 Mar 2. pii: S1097-2765(20)30110-6. doi:, 10.1016/j.molcel.2020.02.017. PMID:32160514<ref>PMID:32160514</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 6psv" style="background-color:#fffaf0;"></div>
+== References ==
+<references/>
+__TOC__
+</StructureSection>
+[[Category: DNA-directed RNA polymerase]]
+[[Category: Large Structures]]
+[[Category: Campbell, E A]]
+[[Category: Chen, J]]
+[[Category: Chiu, C E]]
+[[Category: Darst, S A]]
+[[Category: Transcription]]
+[[Category: Transcription-dna complex]]