6tvt

From Proteopedia

(Difference between revisions)

Current revision

Crystal structure of the haemagglutinin mutant (Gln226Leu, Del228) from an H10N7 seal influenza virus isolated in Germany in complex with human receptor analogue 6'-SLN

Structural highlights

6tvt is a 6 chain structure with sequence from Influenza A virus (A/harbour seal/Germany/1/2014(H10N7)). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.2Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

A0A0A7HR51_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 2014, an outbreak of avian A/H10N7 influenza virus occurred among seals along North-European coastal waters, significantly impacting seal populations. Here, we examine the cross-species transmission and mammalian adaptation of this influenza A virus, revealing changes in the hemagglutinin surface protein that increase stability and receptor binding. The seal A/H10N7 virus was aerosol or respiratory droplet transmissible between ferrets. Compared with avian H10 hemagglutinin, seal H10 hemagglutinin showed stronger binding to the human-type sialic acid receptor, with preferential binding to alpha2,6-linked sialic acids on long extended branches. In X-ray structures, changes in the 220-loop of the receptor-binding pocket caused similar interactions with human receptor as seen for pandemic strains. Two substitutions made seal H10 hemagglutinin more stable than avian H10 hemagglutinin and similar to human hemagglutinin. Consequently, identification of avian-origin influenza viruses across mammals appears critical to detect influenza A viruses posing a major threat to humans and other mammals.

Hemagglutinin Traits Determine Transmission of Avian A/H10N7 Influenza Virus between Mammals.,Herfst S, Zhang J, Richard M, McBride R, Lexmond P, Bestebroer TM, Spronken MIJ, de Meulder D, van den Brand JM, Rosu ME, Martin SR, Gamblin SJ, Xiong X, Peng W, Bodewes R, van der Vries E, Osterhaus ADME, Paulson JC, Skehel JJ, Fouchier RAM Cell Host Microbe. 2020 Oct 7;28(4):602-613.e7. doi: 10.1016/j.chom.2020.08.011. PMID:33031770^[1]

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

References

↑ Herfst S, Zhang J, Richard M, McBride R, Lexmond P, Bestebroer TM, Spronken MIJ, de Meulder D, van den Brand JM, Rosu ME, Martin SR, Gamblin SJ, Xiong X, Peng W, Bodewes R, van der Vries E, Osterhaus ADME, Paulson JC, Skehel JJ, Fouchier RAM. Hemagglutinin Traits Determine Transmission of Avian A/H10N7 Influenza Virus between Mammals. Cell Host Microbe. 2020 Oct 7;28(4):602-613.e7. PMID:33031770 doi:10.1016/j.chom.2020.08.011

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6tvt"

@@ Line 5: / Line 5: @@
 <table><tr><td colspan='2'>[[6tvt]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/harbour_seal/Germany/1/2014(H10N7)) Influenza A virus (A/harbour seal/Germany/1/2014(H10N7))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TVT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TVT 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]] 2.2&#8491;</td></tr>
-<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <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=6tvt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tvt OCA], [https://pdbe.org/6tvt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tvt RCSB], [https://www.ebi.ac.uk/pdbsum/6tvt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tvt ProSAT]</span></td></tr>
 </table>

6tvt

From Proteopedia

Current revision

Crystal structure of the haemagglutinin mutant (Gln226Leu, Del228) from an H10N7 seal influenza virus isolated in Germany in complex with human receptor analogue 6'-SLN

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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