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==Crystal structure of hemagglutinin from an H7N9 influenza virus in complex with LSTa==
==Crystal structure of hemagglutinin from an H7N9 influenza virus in complex with LSTa==
<StructureSection load='4n5k' size='340' side='right' caption='[[4n5k]], [[Resolution|resolution]] 2.71&Aring;' scene=''>
<StructureSection load='4n5k' size='340' side='right'caption='[[4n5k]], [[Resolution|resolution]] 2.71&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4n5k]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/shanghai/02/2013(h7n9)) Influenza a virus (a/shanghai/02/2013(h7n9))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4N5K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4N5K FirstGlance]. <br>
<table><tr><td colspan='2'>[[4n5k]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/Shanghai/02/2013(H7N9)) Influenza A virus (A/Shanghai/02/2013(H7N9))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4N5K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4N5K FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SIA:O-SIALIC+ACID'>SIA</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7053&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4n5j|4n5j]]</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=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SIA:O-SIALIC+ACID'>SIA</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HA, hemagglutinin ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1332244 Influenza A virus (A/Shanghai/02/2013(H7N9))])</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=4n5k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4n5k OCA], [https://pdbe.org/4n5k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4n5k RCSB], [https://www.ebi.ac.uk/pdbsum/4n5k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4n5k ProSAT]</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=4n5k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4n5k OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4n5k RCSB], [http://www.ebi.ac.uk/pdbsum/4n5k PDBsum]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/R4NN21_9INFA R4NN21_9INFA]] 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 (By similarity).[RuleBase:RU003324][SAAS:SAAS008980_004_327643]  
[https://www.uniprot.org/uniprot/R4NN21_9INFA R4NN21_9INFA] 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 (By similarity).[RuleBase:RU003324][SAAS:SAAS008980_004_327643]
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== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
</div>
<div class="pdbe-citations 4n5k" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Hemagglutinin|Hemagglutinin]]
*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Wilson, I A]]
[[Category: Large Structures]]
[[Category: Xu, R]]
[[Category: Wilson IA]]
[[Category: Hemagglutinin]]
[[Category: Xu R]]
[[Category: Viral envelope protein]]
[[Category: Viral fusion protein]]
[[Category: Viral protein]]

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