View source for 6dc3


==RSV prefusion F bound to RSD5 Fab==
<StructureSection load='6dc3' size='340' side='right'caption='[[6dc3]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6dc3]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens], [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1], [https://en.wikipedia.org/wiki/Human_respiratory_syncytial_virus_A2 Human respiratory syncytial virus A2] and [https://en.wikipedia.org/wiki/Unidentified Unidentified]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DC3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DC3 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]] 3.501&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=6dc3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6dc3 OCA], [https://pdbe.org/6dc3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6dc3 RCSB], [https://www.ebi.ac.uk/pdbsum/6dc3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6dc3 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6N089_HUMAN Q6N089_HUMAN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The respiratory syncytial virus (RSV) fusion (F) glycoprotein is a major target of neutralizing antibodies arising from natural infection, and antibodies that specifically bind to the prefusion conformation of RSV F generally demonstrate the greatest neutralization potency. Prefusion-stabilized RSV F variants have been engineered as vaccine antigens, but crystal structures of these variants have revealed conformational differences in a key antigenic site located at the apex of the trimer, referred to as antigenic site O. Currently, it is unclear if flexibility in this region is an inherent property of prefusion RSV F or if it is related to inadequate stabilization of site O in the engineered variants. Therefore, we set out to investigate the conformational flexibility of antigenic site O, as well as the ability of the human immune system to recognize alternative conformations of this site, by determining crystal structures of prefusion RSV F bound to neutralizing human-derived antibodies AM22 and RSD5. Both antibodies bound with high affinity and were specific for the prefusion conformation of RSV F. Crystal structures of the complexes revealed that the antibodies recognized distinct conformations of antigenic site O, each diverging at a conserved proline residue located in the middle of an alpha-helix. These data suggest that antigenic site O exists as an ensemble of conformations, with individual antibodies recognizing discrete states. Collectively, these results have implications for the refolding of pneumovirus and paramyxovirus fusion proteins and should inform development of prefusion-stabilized RSV F vaccine candidates.

Alternative conformations of a major antigenic site on RSV F.,Jones HG, Battles MB, Lin CC, Bianchi S, Corti D, McLellan JS PLoS Pathog. 2019 Jul 15;15(7):e1007944. doi: 10.1371/journal.ppat.1007944., eCollection 2019 Jul. PMID:31306469<ref>PMID:31306469</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6dc3" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Human respiratory syncytial virus A2]]
[[Category: Large Structures]]
[[Category: Unidentified]]
[[Category: Battles MB]]
[[Category: Jones HJ]]
[[Category: McLellan JS]]