View source for 4lkk


==The structure of hemagglutinin L226Q mutant (H3 numbering) from a avian-origin H7N9 influenza virus (A/Anhui/1/2013) in complex with human receptor analog 6'SLNLN==
<StructureSection load='4lkk' size='340' side='right'caption='[[4lkk]], [[Resolution|resolution]] 2.49&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4lkk]] is a 2 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=4LKK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4LKK 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]] 2.491&#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=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=4lkk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lkk OCA], [https://pdbe.org/4lkk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4lkk RCSB], [https://www.ebi.ac.uk/pdbsum/4lkk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4lkk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/V5IRV2_9INFA V5IRV2_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 4lkk" 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]]