4k63

From Proteopedia

(Difference between revisions)

Revision as of 18:50, 4 August 2016

Structure of an avian influenza H5 hemagglutinin from the influenza virus complexed with avian receptor analog LSTa

Structural highlights

4k63 is a 8 chain structure with sequence from Influenza a virus (a/indonesia/5/05(h5n1)). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
NonStd Res:
Related:	4k62, 4k64, 4k65, 4k66, 4k67
Gene:	HA (Influenza A virus (A/Indonesia/5/05(H5N1)))
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[A8HWY8_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] 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).[SAAS:SAAS00204388]

Publication Abstract from PubMed

Recent studies have identified several mutations in the hemagglutinin (HA) protein that allow the highly pathogenic avian H5N1 influenza A virus to transmit between mammals by airborne route. Here, we determined the complex structures of wild-type and mutant HAs derived from an Indonesia H5N1 virus bound to either avian or human receptor sialic acid analogs. A cis/trans conformational change in the glycosidic linkage of the receptor analog was observed, which explains how the H5N1 virus alters its receptor binding preference. Furthermore, the mutant HA possessed low affinities for both avian and human receptors. Our findings provide a structural and biophysical basis for the H5N1 adaptation to acquire human, but maintain avian, receptor binding properties.

An Airborne Transmissible Avian Influenza H5 Hemagglutinin Seen at the Atomic Level.,Zhang W, Shi Y, Lu X, Shu Y, Qi J, Gao GF Science. 2013 May 2. PMID:23641058^[1]

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

References

↑ Zhang W, Shi Y, Lu X, Shu Y, Qi J, Gao GF. An Airborne Transmissible Avian Influenza H5 Hemagglutinin Seen at the Atomic Level. Science. 2013 May 2. PMID:23641058 doi:10.1126/science.1236787

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/4k63"

@@ Line 1: / Line 1: @@
 ==Structure of an avian influenza H5 hemagglutinin from the influenza virus complexed with avian receptor analog LSTa==
 <StructureSection load='4k63' size='340' side='right' caption='[[4k63]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4k63]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/indonesia/5/2005(h5n1)) Influenza a virus (a/indonesia/5/2005(h5n1))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4K63 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4K63 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4k63]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Influenza_a_virus_(a/indonesia/5/05(h5n1)) Influenza a virus (a/indonesia/5/05(h5n1))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4K63 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4K63 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene></td></tr>
 <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">[[4k62|4k62]], [[4k64|4k64]], [[4k65|4k65]], [[4k66|4k66]], [[4k67|4k67]]</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=400788 Influenza A virus (A/Indonesia/5/2005(H5N1))])</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=400788 Influenza A virus (A/Indonesia/5/05(H5N1))])</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=4k63 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k63 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4k63 RCSB], [http://www.ebi.ac.uk/pdbsum/4k63 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=4k63 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4k63 OCA], [http://pdbe.org/4k63 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4k63 RCSB], [http://www.ebi.ac.uk/pdbsum/4k63 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4k63 ProSAT]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/A8HWY8_9INFA A8HWY8_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]  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).[SAAS:SAAS00204388]
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 17: / Line 20: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4k63" style="background-color:#fffaf0;"></div>
 ==See Also==

4k63

From Proteopedia

Revision as of 18:50, 4 August 2016

Structure of an avian influenza H5 hemagglutinin from the influenza virus complexed with avian receptor analog LSTa

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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