View source for 3vun


==Crystal structure of a influenza A virus (A/Aichi/2/1968 H3N2) hemagglutinin in C2 space group.==
<StructureSection load='3vun' size='340' side='right'caption='[[3vun]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3vun]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_a_virus Influenza a virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3VUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3VUN FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></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=3vun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3vun OCA], [https://pdbe.org/3vun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3vun RCSB], [https://www.ebi.ac.uk/pdbsum/3vun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3vun ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/HEMA_I68A0 HEMA_I68A0]] Binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization of about two third of the virus particles through clathrin-dependent endocytosis and about one third through a clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore. 

==See Also==
*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
__TOC__
</StructureSection>
[[Category: Influenza a virus]]
[[Category: Large Structures]]
[[Category: Kawaguchi, A]]
[[Category: Nobusawa, E]]
[[Category: Suzuki, T]]
[[Category: Yasutake, Y]]
[[Category: Glycosilation]]
[[Category: Membrane fusion]]
[[Category: Viral envelope protein]]
[[Category: Viral protein]]