7dxp

==Influenza H5N1 nucleoprotein in complex with nucleotides==

<StructureSection load='7dxp' size='340' side='right'caption='[[7dxp]], [[Resolution|resolution]] 2.30&Aring;' scene=''>

<table><tr><td colspan='2'>[[7dxp]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/Hong_Kong/483/1997(H5N1)) Influenza A virus (A/Hong Kong/483/1997(H5N1))] and [https://en.wikipedia.org/wiki/Unidentified_influenza_virus Unidentified influenza virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7DXP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7DXP FirstGlance]. <br>

</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#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=7dxp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7dxp OCA], [https://pdbe.org/7dxp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7dxp RCSB], [https://www.ebi.ac.uk/pdbsum/7dxp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7dxp ProSAT]</span></td></tr>

== Function ==

[https://www.uniprot.org/uniprot/Q9IP53_9INFA Q9IP53_9INFA] 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]

==See Also==

*[[Nucleoprotein 3D structures|Nucleoprotein 3D structures]]

[[Category: Unidentified influenza virus]]

[[Category: Xu S]]