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{{STRUCTURE_4n5k|  PDB=4n5k  |  SCENE=  }}
==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=''>
{{ABSTRACT_PUBMED_24311689}}
== 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>
</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>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4n5j|4n5j]]</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'>[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>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The 2013 outbreak of avian-origin H7N9 influenza in eastern China has raised concerns about its ability to transmit in the human population. The hemagglutinin glycoprotein of most human H7N9 viruses carries Leu(226), a residue linked to adaptation of H2N2 and H3N2 pandemic viruses to human receptors. However, glycan array analysis of the H7 hemagglutinin reveals negligible binding to humanlike alpha2-6-linked receptors and strong preference for a subset of avian-like alpha2-3-linked glycans recognized by all avian H7 viruses. Crystal structures of H7N9 hemagglutinin and six hemagglutinin-glycan complexes have elucidated the structural basis for preferential recognition of avian-like receptors. These findings suggest that the current human H7N9 viruses are poorly adapted for efficient human-to-human transmission.


==Function==
Preferential recognition of avian-like receptors in human influenza A H7N9 viruses.,Xu R, de Vries RP, Zhu X, Nycholat CM, McBride R, Yu W, Paulson JC, Wilson IA Science. 2013 Dec 6;342(6163):1230-5. doi: 10.1126/science.1243761. PMID:24311689<ref>PMID:24311689</ref>
[[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]


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[4n5k]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4N5K OCA].
</div>


==Reference==
==See Also==
<ref group="xtra">PMID:024311689</ref><references group="xtra"/><references/>
*[[Hemagglutinin|Hemagglutinin]]
[[Category: Wilson, I A.]]
== References ==
[[Category: Xu, R.]]
<references/>
__TOC__
</StructureSection>
[[Category: Wilson, I A]]
[[Category: Xu, R]]
[[Category: Hemagglutinin]]
[[Category: Hemagglutinin]]
[[Category: Viral envelope protein]]
[[Category: Viral envelope protein]]
[[Category: Viral fusion protein]]
[[Category: Viral fusion protein]]
[[Category: Viral protein]]
[[Category: Viral protein]]

Revision as of 20:29, 21 December 2014

Crystal structure of hemagglutinin from an H7N9 influenza virus in complex with LSTaCrystal structure of hemagglutinin from an H7N9 influenza virus in complex with LSTa

Structural highlights

4n5k is a 4 chain structure with sequence from Influenza a virus (a/shanghai/02/2013(h7n9)). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:, , ,
Gene:HA, hemagglutinin (Influenza A virus (A/Shanghai/02/2013(H7N9)))
Resources:FirstGlance, OCA, RCSB, PDBsum

Publication Abstract from PubMed

The 2013 outbreak of avian-origin H7N9 influenza in eastern China has raised concerns about its ability to transmit in the human population. The hemagglutinin glycoprotein of most human H7N9 viruses carries Leu(226), a residue linked to adaptation of H2N2 and H3N2 pandemic viruses to human receptors. However, glycan array analysis of the H7 hemagglutinin reveals negligible binding to humanlike alpha2-6-linked receptors and strong preference for a subset of avian-like alpha2-3-linked glycans recognized by all avian H7 viruses. Crystal structures of H7N9 hemagglutinin and six hemagglutinin-glycan complexes have elucidated the structural basis for preferential recognition of avian-like receptors. These findings suggest that the current human H7N9 viruses are poorly adapted for efficient human-to-human transmission.

Preferential recognition of avian-like receptors in human influenza A H7N9 viruses.,Xu R, de Vries RP, Zhu X, Nycholat CM, McBride R, Yu W, Paulson JC, Wilson IA Science. 2013 Dec 6;342(6163):1230-5. doi: 10.1126/science.1243761. PMID:24311689[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. ↑ Xu R, de Vries RP, Zhu X, Nycholat CM, McBride R, Yu W, Paulson JC, Wilson IA. Preferential recognition of avian-like receptors in human influenza A H7N9 viruses. Science. 2013 Dec 6;342(6163):1230-5. doi: 10.1126/science.1243761. PMID:24311689 doi:http://dx.doi.org/10.1126/science.1243761

4n5k, resolution 2.71Å

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