6kuj

<StructureSection load='6kuj' size='340' side='right'caption='[[6kuj]], [[Resolution|resolution]] 3.40&Aring;' scene=''>

<table><tr><td colspan='2'>[[6kuj]] is a 5 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=6ju2 6ju2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KUJ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KUJ FirstGlance]. <br>

</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/RNA-directed_RNA_polymerase RNA-directed RNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.48 2.7.7.48] </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=6kuj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6kuj OCA], [http://pdbe.org/6kuj PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6kuj RCSB], [http://www.ebi.ac.uk/pdbsum/6kuj PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6kuj ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

The influenza virus polymerase uses capped RNA primers to initiate transcription, and a combination of terminal and internal de novo initiations for the two-step replication process by binding the conserved viral genomic RNA (vRNA) or complementary RNA (cRNA) promoter. Here, we determined the apo and promoter-bound influenza D polymerase structures using cryo-electron microscopy and found the polymerase has an evolutionarily conserved stable core structure with inherently flexible peripheral domains. Strikingly, two conformations (mode A and B) of the vRNA promoter were observed where the 3'-vRNA end can bind at two different sites, whereas the cRNA promoter only binds in the mode B conformation. Functional studies confirmed the critical role of the mode B conformation for vRNA synthesis via the intermediate cRNA but not for cRNA production, which is mainly regulated by the mode A conformation. Both conformations participate in the regulation of the transcription process. This work advances our understanding of the regulatory mechanisms for the synthesis of different RNA species by influenza virus polymerase and opens new opportunities for antiviral drug design.

 

<div class="pdbe-citations 6kuj" style="background-color:#fffaf0;"></div>

== References ==

</StructureSection>

[[Category: RNA-directed RNA polymerase]]

[[Category: Gao, G F]]

[[Category: Peng, Q]]

[[Category: Peng, R]]

[[Category: Qi, J]]

[[Category: Shi, Y]]

[[Category: Viral protein-rna complex]]