View source for 9v47


==Coupling of polymerase-nucleoprotein-RNA in an influenza virus mini ribonucleoprotein complex==
<StructureSection load='9v47' size='340' side='right'caption='[[9v47]], [[Resolution|resolution]] 4.52&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9v47]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/Victoria/3/1975(H3N2)) Influenza A virus (A/Victoria/3/1975(H3N2))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9V47 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9V47 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]] 4.52&#8491;</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=9v47 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9v47 OCA], [https://pdbe.org/9v47 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9v47 RCSB], [https://www.ebi.ac.uk/pdbsum/9v47 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9v47 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9WLG4_I75A3 Q9WLG4_I75A3] Encapsidates the negative strand viral RNA, protecting it from nucleases. The encapsidated genomic RNA is termed the ribonucleoprotein (RNP) and serves as template for transcription and replication. The RNP needs to be localized in the host nucleus to start an infectious cycle, but is too large to diffuse through the nuclear pore complex. NP comprises at least 2 nuclear localization signals that are responsible for the active RNP import into the nucleus through cellular importin alpha/beta pathway. Later in the infection, nclear export of RNPs are mediated through viral proteins NEP interacting with M1 which binds nucleoproteins. It is possible that nucleoprotein binds directly host exportin-1/XPO1 and plays an active role in RNPs nuclear export. M1 interaction with RNP seems to hide nucleoprotein's nuclear localization signals. Soon after a virion infects a new cell, M1 dissociates from the RNP under acidification of the virion driven by M2 protein. Dissociation of M1 from RNP unmasks nucleoprotein's nuclear localization signals, targeting the RNP to the nucleus.[HAMAP-Rule:MF_04070]
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Kang H]]
[[Category: Li M]]
[[Category: Lin Y]]
[[Category: Liu Y]]
[[Category: Lou Z]]
[[Category: Rao Z]]
[[Category: Yang Y]]
[[Category: Zhang L]]