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==Crystal structure of anti-HCV human neutralizing antibody B107==
<StructureSection load='9yk6' size='340' side='right'caption='[[9yk6]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9yk6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9YK6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9YK6 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]] 1.6&#8491;</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=9yk6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9yk6 OCA], [https://pdbe.org/9yk6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9yk6 RCSB], [https://www.ebi.ac.uk/pdbsum/9yk6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9yk6 ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
The induction of potent and cross-reactive neutralizing antibody (nAb) responses remains a challenge in vaccine development against antigenically diverse viruses such as hepatitis C virus (HCV). The HCV E1E2 glycoprotein complex contains two major neutralizing sites: the neutralizing face (NF) and the less explored bridging domain (BD). Here, we characterized 25 BD-targeting nAbs isolated from infection or immunization. These antibodies arise from diverse B cell lineages but share convergent CDRH3 features. Epitope mapping by alanine scanning and negative-stain electron microscopy revealed overlapping epitopes on BD spanning antigenic regions AR4 and AR5, with variable back layer engagement. The crystal structure of a non-human primate BD nAb RM3-26 in complex with E2 uncovered a back layer-directed recognition mode analogous to that of the human nAb hcab40. Together, BD- and NF-directed nAbs exhibited additivity in their neutralization, highlighting BD as a conserved site of vulnerability on HCV and a valuable target for rational vaccine design.

The conserved bridging domain on HCV E1E2 glycoprotein complex is targeted by neutralizing antibodies from diverse lineages.,Chen F, Nguyen YTK, Lee YZ, Giang E, Lau SC, Koide Y, Hung SH, Ueno L, He L, Fuerst TR, Lauer GM, Stanfield RL, Zhu J, Wilson IA, Law M bioRxiv [Preprint]. 2025 Nov 7:2025.11.05.686883. doi: 10.1101/2025.11.05.686883. PMID:41280117<ref>PMID:41280117</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Nguyen TKY]]
[[Category: Wilson IA]]