View source for 6idb


==Crystal structure of H7 hemagglutinin mutant H7-SVTQ ( A138S, P221T, L226Q) with 6'SLN==
<StructureSection load='6idb' size='340' side='right'caption='[[6idb]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6idb]] 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=6IDB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6IDB 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]] 2.502&#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_900046:6-sialyl-N-acetyllactosamine'>PRD_900046</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=6idb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6idb OCA], [https://pdbe.org/6idb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6idb RCSB], [https://www.ebi.ac.uk/pdbsum/6idb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6idb ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Since 2013, H7N9 avian influenza viruses (AIVs) have caused more than 1,600 human infections, posing a threat to public health. An emerging concern is whether H7N9 AIVs will cause pandemics among humans. Molecular analysis of hemagglutinin (HA), which is a critical determinant of interspecies transmission, shows that the current H7N9 AIVs are still dual-receptor tropic, indicating limited human-to-human transmission potency. Mutagenesis and structural studies reveal that a G186V substitution is sufficient for H7N9 AIVs to acquire human receptor-binding capacity, and a Q226L substitution would favor binding to both avian and human receptors only when paired with A138/V186/P221 hydrophobic residues. These data suggest a different evolutionary route of H7N9 viruses compared to other AIV-subtype HAs.

Avian-to-Human Receptor-Binding Adaptation of Avian H7N9 Influenza Virus Hemagglutinin.,Xu Y, Peng R, Zhang W, Qi J, Song H, Liu S, Wang H, Wang M, Xiao H, Fu L, Fan Z, Bi Y, Yan J, Shi Y, Gao GF Cell Rep. 2019 Nov 19;29(8):2217-2228.e5. doi: 10.1016/j.celrep.2019.10.047. PMID:31747596<ref>PMID:31747596</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6idb" style="background-color:#fffaf0;"></div>

==See Also==
*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Influenza A virus]]
[[Category: Large Structures]]
[[Category: Gao GF]]
[[Category: Qi JX]]
[[Category: Xu Y]]