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==Crystal structure of Fab 3.1 in complex with the 1918 influenza virus hemagglutinin==
==Crystal structure of Fab 3.1 in complex with the 1918 influenza virus hemagglutinin==
<StructureSection load='4py8' size='340' side='right' caption='[[4py8]], [[Resolution|resolution]] 2.91&Aring;' scene=''>
<StructureSection load='4py8' size='340' side='right'caption='[[4py8]], [[Resolution|resolution]] 2.91&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4py8]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PY8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4PY8 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4py8]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/South_Carolina/1/1918(H1N1)) Influenza A virus (A/South Carolina/1/1918(H1N1))]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PY8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4PY8 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.91&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4py7|4py7]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MLI:MALONATE+ION'>MLI</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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=4py8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4py8 OCA], [http://pdbe.org/4py8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4py8 RCSB], [http://www.ebi.ac.uk/pdbsum/4py8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4py8 ProSAT]</span></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=4py8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4py8 OCA], [https://pdbe.org/4py8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4py8 RCSB], [https://www.ebi.ac.uk/pdbsum/4py8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4py8 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/HEMA_I18A0 HEMA_I18A0]] 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).  
[https://www.uniprot.org/uniprot/HEMA_I18A0 HEMA_I18A0] 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).
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== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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==See Also==
==See Also==
*[[Hemagglutinin|Hemagglutinin]]
*[[Antibody 3D structures|Antibody 3D structures]]
*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
*[[3D structures of human antibody|3D structures of human antibody]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Dreyfus, C]]
[[Category: Homo sapiens]]
[[Category: Hemagglutinin glycoprotein]]
[[Category: Large Structures]]
[[Category: Immunoglobulin fab fragment]]
[[Category: Dreyfus C]]
[[Category: Membrane fusion]]
[[Category: Neutralizing antibody]]
[[Category: Viral protein-immune system complex]]

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