4XHJ image
Entry Detail
PDB ID:
4XHJ
Title:
gHgL of Varicella-zoster virus in complex with human neutralizing antibodies.
Biological Source:
PDB Version:
Deposition Date:
2015-01-05
Release Date:
2015-05-13
Method Details:
Experimental Method:
Resolution:
3.16 Å
R-Value Free:
0.27
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 43
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Envelope glycoprotein H
Chain IDs:A, E
Chain Length:833
Number of Molecules:2
Biological Source:Human herpesvirus 3 strain Oka vaccine
Polymer Type:polypeptide(L)
Description:Envelope glycoprotein L
Chain IDs:B, F
Chain Length:138
Number of Molecules:2
Biological Source:Human herpesvirus 3 strain Oka vaccine
Polymer Type:polypeptide(L)
Description:Fab-RC light chain
Chain IDs:C, G
Chain Length:215
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Fab-RC heavy chain
Chain IDs:D, H
Chain Length:282
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
A site of varicella-zoster virus vulnerability identified by structural studies of neutralizing antibodies bound to the glycoprotein complex gHgL.
Proc.Natl.Acad.Sci.USA 112 6056 6061 (2015)
PMID: 25918416 DOI: 10.1073/pnas.1501176112

Abstact

Varicella-zoster virus (VZV), of the family Alphaherpesvirinae, causes varicella in children and young adults, potentially leading to herpes zoster later in life on reactivation from latency. The conserved herpesvirus glycoprotein gB and the heterodimer gHgL mediate virion envelope fusion with cell membranes during virus entry. Naturally occurring neutralizing antibodies against herpesviruses target these entry proteins. To determine the molecular basis for VZV neutralization, crystal structures of gHgL were determined in complex with fragments of antigen binding (Fabs) from two human monoclonal antibodies, IgG-94 and IgG-RC, isolated from seropositive subjects. These structures reveal that the antibodies target the same site, composed of residues from both gH and gL, distinct from two other neutralizing epitopes identified by negative-stain electron microscopy and mutational analysis. Inhibition of gB/gHgL-mediated membrane fusion and structural comparisons with herpesvirus homologs suggest that the IgG-RC/94 epitope is in proximity to the site on VZV gHgL that activates gB. Immunization studies proved that the anti-gHgL IgG-RC/94 epitope is a critical target for antibodies that neutralize VZV. Thus, the gHgL/Fab structures delineate a site of herpesvirus vulnerability targeted by natural immunity.

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Primary Citation of related structures