View source for 6eaj


==CRYSTAL STRUCTURE OF HUMAN RESPIRATORY SYNCYTIAL VIRUS FUSION GLYCOPROTEIN INHIBITOR ESCAPE VARIANT T400A STABILIZED IN THE PREFUSION STATE==
<StructureSection load='6eaj' size='340' side='right'caption='[[6eaj]], [[Resolution|resolution]] 2.85&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6eaj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_orthopneumovirus Human orthopneumovirus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6EAJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6EAJ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.851&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NHE:2-[N-CYCLOHEXYLAMINO]ETHANE+SULFONIC+ACID'>NHE</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TAR:D(-)-TARTARIC+ACID'>TAR</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=6eaj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6eaj OCA], [https://pdbe.org/6eaj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6eaj RCSB], [https://www.ebi.ac.uk/pdbsum/6eaj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6eaj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FUS_HRSVA FUS_HRSVA] 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 plasma cell membrane fusion, the heptad repeat (HR) 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 plasma cell membranes. Directs fusion of viral and cellular membranes leading to delivery of the nucleocapsid into the cytoplasm. This fusion is pH independent and occurs directly at the outer cell membrane. The trimer of F1-F2 (protein F) interacts with glycoprotein G at the virion surface. Upon binding of G to heparan sulfate, the hydrophobic fusion peptide is unmasked and interacts with the cellular membrane, inducing the fusion between host cell and virion membranes. Notably, RSV fusion protein is able to interact directly with heparan sulfate and therefore actively participates in virus attachment. Furthermore, the F2 subunit was identifed as the major determinant of RSV host cell specificity. Later in infection, proteins F expressed at the plasma membrane of infected cells mediate fusion with adjacent cells to form syncytia, a cytopathic effect that could lead to tissue necrosis. The fusion protein is also able to trigger p53-dependent apoptosis.<ref>PMID:12663767</ref> <ref>PMID:18216092</ref> 
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human orthopneumovirus]]
[[Category: Large Structures]]
[[Category: Battles MB]]
[[Category: McLellan JS]]