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| | <StructureSection load='3al4' size='340' side='right'caption='[[3al4]], [[Resolution|resolution]] 2.87Å' scene=''> | | <StructureSection load='3al4' size='340' side='right'caption='[[3al4]], [[Resolution|resolution]] 2.87Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3al4]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/I09a0 I09a0]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3lyj 3lyj]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AL4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AL4 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3al4]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus_(A/California/04/2009(H1N1)) Influenza A virus (A/California/04/2009(H1N1))]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3lyj 3lyj]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AL4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AL4 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</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]] 2.872Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1ru7|1ru7]], [[1rv0|1rv0]], [[1ruz|1ruz]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HEMAGGLUTININ ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=641501 I09A0])</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=3al4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3al4 OCA], [https://pdbe.org/3al4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3al4 RCSB], [https://www.ebi.ac.uk/pdbsum/3al4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3al4 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=3al4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3al4 OCA], [https://pdbe.org/3al4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3al4 RCSB], [https://www.ebi.ac.uk/pdbsum/3al4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3al4 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/C3W5S1_I09A0 C3W5S1_I09A0]] 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:SAAS013829_004_327643][RuleBase:RU003324]
| + | [https://www.uniprot.org/uniprot/C3W5S1_I09A0 C3W5S1_I09A0] 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:SAAS013829_004_327643][RuleBase:RU003324] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: I09a0]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Gao, G F]] | + | [[Category: Gao GF]] |
| - | [[Category: Li, Q]] | + | [[Category: Li Q]] |
| - | [[Category: Qi, J X]] | + | [[Category: Qi JX]] |
| - | [[Category: Shi, Y]] | + | [[Category: Shi Y]] |
| - | [[Category: Yan, J H]] | + | [[Category: Yan JH]] |
| - | [[Category: Zhang, W]] | + | [[Category: Zhang W]] |
| - | [[Category: Envelope protein]]
| + | |
| - | [[Category: Hemagglutinin]]
| + | |
| - | [[Category: Trimer]]
| + | |
| - | [[Category: Viral protein-viral protein complex]]
| + | |
| Structural highlights
Function
C3W5S1_I09A0 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:SAAS013829_004_327643][RuleBase:RU003324]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Influenza virus is the causative agent of the seasonal and occasional pandemic flu. The current H1N1 influenza pandemic, announced by the WHO in June 2009, is highly contagious and responsible for global economic losses and fatalities. Although the H1N1 gene segments have three origins in terms of host species, the virus has been named swine-origin influenza virus (S-OIV) due to a predominant swine origin. 2009 S-OIV has been shown to highly resemble the 1918 pandemic virus in many aspects. Hemagglutinin is responsible for the host range and receptor binding of the virus and is therefore a primary indicator for the potential of infection. Primary sequence analysis of the 2009 S-OIV hemagglutinin (HA) reveals its closest relationship to that of the 1918 pandemic influenza virus, however, analysis at the structural level is necessary to critically assess the functional significance. In this report, we report the crystal structure of soluble hemagglutinin H1 (09H1) at 2.9 A, illustrating that the 09H1 is very similar to the 1918 pandemic HA (18H1) in overall structure and the structural modules, including the five defined antiboby (Ab)-binding epitopes. Our results provide an explanation as to why sera from the survivors of the 1918 pandemics can neutralize the 2009 S-OIV, and people born around the 1918 are resistant to the current pandemic, yet younger generations are more susceptible to the 2009 pandemic.
Crystal structure of the swine-origin A (H1N1)-2009 influenza A virus hemagglutinin (HA) reveals similar antigenicity to that of the 1918 pandemic virus.,Zhang W, Qi J, Shi Y, Li Q, Gao F, Sun Y, Lu X, Lu Q, Vavricka CJ, Liu D, Yan J, Gao GF Protein Cell. 2010 May;1(5):459-67. Epub 2010 Jun 4. PMID:21203961[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Zhang W, Qi J, Shi Y, Li Q, Gao F, Sun Y, Lu X, Lu Q, Vavricka CJ, Liu D, Yan J, Gao GF. Crystal structure of the swine-origin A (H1N1)-2009 influenza A virus hemagglutinin (HA) reveals similar antigenicity to that of the 1918 pandemic virus. Protein Cell. 2010 May;1(5):459-67. Epub 2010 Jun 4. PMID:21203961 doi:10.1007/s13238-010-0059-1
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