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1ti8

From Proteopedia

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[[Image:1ti8.gif|left|200px]]
 
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==H7 Haemagglutinin==
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The line below this paragraph, containing "STRUCTURE_1ti8", creates the "Structure Box" on the page.
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<StructureSection load='1ti8' size='340' side='right'caption='[[1ti8]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1ti8]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Influenza_A_virus Influenza A virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TI8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TI8 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</scene></td></tr>
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{{STRUCTURE_1ti8| PDB=1ti8 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ti8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ti8 OCA], [https://pdbe.org/1ti8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ti8 RCSB], [https://www.ebi.ac.uk/pdbsum/1ti8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ti8 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/Q6GYW3_9INFA Q6GYW3_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:SAAS013829_004_327643]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ti/1ti8_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ti8 ConSurf].
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<div style="clear:both"></div>
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'''H7 Haemagglutinin'''
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==See Also==
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*[[Hemagglutinin 3D structures|Hemagglutinin 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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Comparing the structures of H3, H5 and H9 subtype haemagglutinins, we deduced a structural basis for including all 15 influenza subtypes in four clades. H3, H5 and H9 represent three of these clades; we now report the structure of an H7 HA as a representative of the fourth clade. We confirm the structure of the turn at the N-terminus of the conserved central alpha-helix of HA2, and the combination of ionisable residues near the "fusion peptide" as clade-specific features. We compare the structures of three H1 HAs with H5 HA in the same clade, to refine our previous classification and we confirm the division of the clades into two groups of two. We also show the roles of carbohydrate side chains in the esterase-fusion domain boundaries in the formation of clade-specific structural markers.
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[[Category: Influenza A virus]]
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[[Category: Large Structures]]
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==About this Structure==
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[[Category: Gamblin SJ]]
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1TI8 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Influenza_a_virus Influenza a virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TI8 OCA].
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[[Category: Ha Y]]
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[[Category: Haire LF]]
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==Reference==
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[[Category: Russell RJ]]
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H1 and H7 influenza haemagglutinin structures extend a structural classification of haemagglutinin subtypes., Russell RJ, Gamblin SJ, Haire LF, Stevens DJ, Xiao B, Ha Y, Skehel JJ, Virology. 2004 Aug 1;325(2):287-96. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15246268 15246268]
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[[Category: Skehel JJ]]
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[[Category: Influenza a virus]]
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[[Category: Stevens DJ]]
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[[Category: Protein complex]]
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[[Category: Xaio B]]
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[[Category: Gamblin, S J.]]
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[[Category: Ha, Y.]]
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[[Category: Haire, L F.]]
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[[Category: Russell, R J.]]
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[[Category: Skehel, J J.]]
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[[Category: Stevens, D J.]]
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[[Category: Xaio, B.]]
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[[Category: H7]]
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[[Category: Haemagglutinin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 09:58:45 2008''
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Current revision

H7 Haemagglutinin

PDB ID 1ti8

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