7w73

<StructureSection load='7w73' size='340' side='right'caption='[[7w73]], [[Resolution|resolution]] 6.40&Aring;' scene=''>

<table><tr><td colspan='2'>[[7w73]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Porcine_epidemic_diarrhea_virus Porcine epidemic diarrhea virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7W73 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7W73 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=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</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'>[https://proteopedia.org/fgij/fg.htm?mol=7w73 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7w73 OCA], [https://pdbe.org/7w73 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7w73 RCSB], [https://www.ebi.ac.uk/pdbsum/7w73 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7w73 ProSAT]</span></td></tr>

== Function ==

[[https://www.uniprot.org/uniprot/A0A1Y0DD46_9ALPC A0A1Y0DD46_9ALPC]] S1 region attaches the virion to the cell membrane by interacting with the host receptor, initiating the infection. Binding to the receptor probably induces conformational changes in the S glycoprotein unmasking the fusion peptide of S2 region and activating membranes fusion. S2 region belongs to the class I viral fusion protein. Under the current model, the protein has at least 3 conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) regions assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes.[HAMAP-Rule:MF_04200]

[[Category: Porcine epidemic diarrhea virus]]