View source for 4qf0


==Structure of a 16 nm protein cage designed by fusing symmetric oligomeric domains, quadruple mutant, P21212 form==
<StructureSection load='4qf0' size='340' side='right'caption='[[4qf0]], [[Resolution|resolution]] 6.49&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4qf0]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus Influenza A virus] and [https://en.wikipedia.org/wiki/Kitasatospora_aureofaciens Kitasatospora aureofaciens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QF0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4QF0 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]] 6.494&#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=4qf0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4qf0 OCA], [https://pdbe.org/4qf0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4qf0 RCSB], [https://www.ebi.ac.uk/pdbsum/4qf0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4qf0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/BPOA2_KITAU BPOA2_KITAU] May be a chlorinating enzyme involved in 7-chlorotetracycline biosynthesis.[https://www.uniprot.org/uniprot/M1_I34A1 M1_I34A1] Plays critical roles in virus replication, from virus entry and uncoating to assembly and budding of the virus particle. M1 binding to ribonucleocapsids (RNPs) in nucleus seems to inhibit viral transcription. Interaction of viral NEP with M1-RNP is thought to promote nuclear export of the complex, which is targeted to the virion assembly site at the apical plasma membrane in polarized epithelial cells. Interactions with NA and HA may bring M1, a non-raft-associated protein, into lipid rafts. Forms a continuous shell on the inner side of the lipid bilayer in virion, where it binds the RNP. During virus entry into cell, the M2 ion channel acidifies the internal virion core, inducing M1 dissociation from the RNP. M1-free RNPs are transported to the nucleus, where viral transcription and replication can take place.<ref>PMID:11531417</ref>   Determines the virion's shape: spherical or filamentous. Clinical isolates of influenza are characterized by the presence of significant proportion of filamentous virions, whereas after multiple passage on eggs or cell culture, virions have only spherical morphology. Filamentous virions are thought to be important to infect neighboring cells, and spherical virions more suited to spread through aerosol between hosts organisms.<ref>PMID:11531417</ref> 

==See Also==
*[[Haloperoxidase|Haloperoxidase]]
== References ==
<references/>
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</StructureSection>
[[Category: Influenza A virus]]
[[Category: Kitasatospora aureofaciens]]
[[Category: Large Structures]]
[[Category: Lai Y-T]]
[[Category: Yeates TO]]