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5t0d

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Revision as of 10:13, 22 November 2017

Crystal structure of H6 hemagglutinin G225D mutant from Taiwan (2013) H6N1 influenza virus in complex with 3'-SLN

Structural highlights

5t0d is a 6 chain structure with sequence from H6n1 subtype. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Gene:	HA (H6N1 subtype)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[A0A0J9X268_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 either through clathrin-dependent endocytosis or through 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.[SAAS:SAAS00842036] 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.[RuleBase:RU003324] [A0A0J9X267_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.[RuleBase:RU003324]

Publication Abstract from PubMed

In June 2013, the first case of human infection with an avian H6N1 virus was reported in a Taiwanese woman. Although this was a single non-fatal case, the virus continues to circulate in Taiwanese poultry. As with any emerging avian virus that infects humans, there is concern that acquisition of human-type receptor specificity could enable transmission in the human population. Despite mutations in the receptor-binding pocket of the human H6N1 isolate, it has retained avian-type (NeuAcalpha2-3Gal) receptor specificity. However, we show here that a single nucleotide substitution, resulting in a change from Gly to Asp at position 225 (G225D), completely switches specificity to human-type (NeuAcalpha2-6Gal) receptors. Significantly, G225D H6 loses binding to chicken trachea epithelium and is now able to bind to human tracheal tissue. Structural analysis reveals that Asp225 directly interacts with the penultimate Gal of the human-type receptor, stabilizing human receptor binding.

A single mutation in Taiwanese H6N1 influenza hemagglutinin switches binding to human-type receptors.,de Vries RP, Tzarum N, Peng W, Thompson AJ, Ambepitiya Wickramasinghe IN, de la Pena ATT, van Breemen MJ, Bouwman KM, Zhu X, McBride R, Yu W, Sanders RW, Verheije MH, Wilson IA, Paulson JC EMBO Mol Med. 2017 Sep;9(9):1314-1325. doi: 10.15252/emmm.201707726. PMID:28694323^[1]

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

References

↑ de Vries RP, Tzarum N, Peng W, Thompson AJ, Ambepitiya Wickramasinghe IN, de la Pena ATT, van Breemen MJ, Bouwman KM, Zhu X, McBride R, Yu W, Sanders RW, Verheije MH, Wilson IA, Paulson JC. A single mutation in Taiwanese H6N1 influenza hemagglutinin switches binding to human-type receptors. EMBO Mol Med. 2017 Sep;9(9):1314-1325. doi: 10.15252/emmm.201707726. PMID:28694323 doi:http://dx.doi.org/10.15252/emmm.201707726

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5t0d"

@@ Line 3: / Line 3: @@
 <StructureSection load='5t0d' size='340' side='right' caption='[[5t0d]], [[Resolution|resolution]] 2.86&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5t0d]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T0D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5T0D FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5t0d]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/H6n1_subtype H6n1 subtype]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T0D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5T0D FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><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 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=119212 H6N1 subtype])</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=5t0d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5t0d OCA], [http://pdbe.org/5t0d PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5t0d RCSB], [http://www.ebi.ac.uk/pdbsum/5t0d PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5t0d ProSAT]</span></td></tr>
 </table>
@@ Line 22: / Line 23: @@
 __TOC__
 </StructureSection>
+[[Category: H6n1 subtype]]
 [[Category: Tzarum, N]]
 [[Category: Wilson, I A]]

5t0d

From Proteopedia

Revision as of 10:13, 22 November 2017

Crystal structure of H6 hemagglutinin G225D mutant from Taiwan (2013) H6N1 influenza virus in complex with 3'-SLN

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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