View source for 4lkg


==The structure of hemagglutinin from a avian-origin H7N9 influenza virus (A/Shanghai/1/2013) in complex with avian receptor analog 3'SLNLN==
<StructureSection load='4lkg' size='340' side='right'caption='[[4lkg]], [[Resolution|resolution]] 2.99&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4lkg]] 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=4LKG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4LKG 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]] 2.994&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PRD_900067:3-sialyl-N-acetyllactosamine'>PRD_900067</scene>, <scene name='pdbligand=SIA:O-SIALIC+ACID'>SIA</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=4lkg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lkg OCA], [https://pdbe.org/4lkg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4lkg RCSB], [https://www.ebi.ac.uk/pdbsum/4lkg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4lkg ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/V5IRV0_9INFA V5IRV0_9INFA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
An avian-origin human-infecting influenza (H7N9) virus was recently identified in China. We have evaluated the viral hemagglutinin (HA) receptor-binding properties of two human H7N9 isolates, A/Shanghai/1/2013 (SH-H7N9) (containing the avian-signature residue Gln(226)) and A/Anhui/1/2013 (AH-H7N9) (containing the mammalian-signature residue Leu(226)). We found that SH-H7N9 HA preferentially binds the avian receptor analog, whereas AH-H7N9 HA binds both avian and human receptor analogs. Furthermore, an AH-H7N9 mutant HA (Leu(226) --&gt; Gln) was found to exhibit dual receptor-binding property, indicating that other amino acid substitutions contribute to the receptor-binding switch. The structures of SH-H7N9 HA, AH-H7N9 HA, and its mutant in complex with either avian or human receptor analogs show how AH-H7N9 can bind human receptors while still retaining the avian receptor-binding property.

Structures and receptor binding of hemagglutinins from human-infecting H7N9 influenza viruses.,Shi Y, Zhang W, Wang F, Qi J, Wu Y, Song H, Gao F, Bi Y, Zhang Y, Fan Z, Qin C, Sun H, Liu J, Haywood J, Liu W, Gong W, Wang D, Shu Y, Wang Y, Yan J, Gao GF Science. 2013 Oct 11;342(6155):243-7. doi: 10.1126/science.1242917. Epub 2013 Sep, 5. PMID:24009358<ref>PMID:24009358</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4lkg" style="background-color:#fffaf0;"></div>

==See Also==
*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Influenza A virus]]
[[Category: Large Structures]]
[[Category: Fan Z]]
[[Category: Gao F]]
[[Category: Gao GF]]
[[Category: Gong W]]
[[Category: Qi J]]
[[Category: Shi Y]]
[[Category: Shu Y]]
[[Category: Song H]]
[[Category: Wang D]]
[[Category: Wang F]]
[[Category: Wang Y]]
[[Category: Wu Y]]
[[Category: Yan J]]
[[Category: Zhang W]]
[[Category: Zhang Y]]