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4cqr

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Revision as of 12:25, 4 August 2016

H5 (VN1194) Ser227Asn/Gln196Arg Mutant Haemagglutinin in Complex with Human Receptor Analogue 6'SLN

Structural highlights

4cqr is a 2 chain structure with sequence from Influenza a virus (a/vietnam/1194/2004(h5n1)). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
NonStd Res:
Related:	4cqp, 4cqq, 4cqs, 4cqt, 4cqu, 4cqv, 4cqw, 4cqx, 4cqy, 4cqz, 4cr0
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[Q6DQ34_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 (By similarity).[RuleBase:RU003324][SAAS:SAAS008980_004_327643]

Publication Abstract from PubMed

Mutant H5N1 influenza viruses have been isolated from humans that have increased human receptor avidity. We have compared the receptor binding properties of these mutants with those of wild-type viruses, and determined the structures of their haemagglutinins in complex with receptor analogues. Mutants from Vietnam bind tighter to human receptor by acquiring basic residues near the receptor binding site. They bind more weakly to avian receptor because they lack specific interactions between Asn-186 and Gln-226. In contrast, a double mutant, Delta133/Ile155Thr, isolated in Egypt has greater avidity for human receptor while retaining wild-type avidity for avian receptor. Despite these increases in human receptor binding, none of the mutants prefers human receptor, unlike aerosol transmissible H5N1 viruses. Nevertheless, mutants with high avidity for both human and avian receptors may be intermediates in the evolution of H5N1 viruses that could infect both humans and poultry.

Enhanced human receptor binding by H5 haemagglutinins.,Xiong X, Xiao H, Martin SR, Coombs PJ, Liu J, Collins PJ, Vachieri SG, Walker PA, Lin YP, McCauley JW, Gamblin SJ, Skehel JJ Virology. 2014 May;456-457:179-87. doi: 10.1016/j.virol.2014.03.008. Epub 2014, Apr 12. PMID:24889237^[1]

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

References

↑ Xiong X, Xiao H, Martin SR, Coombs PJ, Liu J, Collins PJ, Vachieri SG, Walker PA, Lin YP, McCauley JW, Gamblin SJ, Skehel JJ. Enhanced human receptor binding by H5 haemagglutinins. Virology. 2014 May;456-457:179-87. doi: 10.1016/j.virol.2014.03.008. Epub 2014, Apr 12. PMID:24889237 doi:http://dx.doi.org/10.1016/j.virol.2014.03.008

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/4cqr"

@@ Line 1: / Line 1: @@
 ==H5 (VN1194) Ser227Asn/Gln196Arg Mutant Haemagglutinin in Complex with Human Receptor Analogue 6'SLN==
 <StructureSection load='4cqr' size='340' side='right' caption='[[4cqr]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SIA:O-SIALIC+ACID'>SIA</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4cqp|4cqp]], [[4cqq|4cqq]], [[4cqs|4cqs]], [[4cqt|4cqt]], [[4cqu|4cqu]], [[4cqv|4cqv]], [[4cqw|4cqw]], [[4cqx|4cqx]], [[4cqy|4cqy]], [[4cqz|4cqz]], [[4cr0|4cr0]]</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=4cqr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cqr OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4cqr RCSB], [http://www.ebi.ac.uk/pdbsum/4cqr PDBsum]</span></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=4cqr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cqr OCA], [http://pdbe.org/4cqr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4cqr RCSB], [http://www.ebi.ac.uk/pdbsum/4cqr PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4cqr ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4cqr" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Hemagglutinin|Hemagglutinin]]
 == References ==
 <references/>

4cqr

From Proteopedia

Revision as of 12:25, 4 August 2016

H5 (VN1194) Ser227Asn/Gln196Arg Mutant Haemagglutinin 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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