5FZ2

Natively membrane-anchored full-length Herpes simplex virus 1 glycoprotein B


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 23.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Two Distinct Trimeric Conformations of Natively Membrane-Anchored Full-Length Herpes Simplex Virus 1 Glycoprotein B.

Zeev-Ben-Mordehai, T.Vasishtan, D.Hernandez Duran, A.Vollmer, B.White, P.Prasad Pandurangan, A.Siebert, C.A.Topf, M.Grunewald, K.

(2016) Proc Natl Acad Sci U S A 113: 4176

  • DOI: 10.1073/pnas.1523234113
  • Primary Citation of Related Structures:  
    5FZ2

  • PubMed Abstract: 
  • Many viruses are enveloped by a lipid bilayer acquired during assembly, which is typically studded with one or two types of glycoproteins. These viral surface proteins act as the primary interface between the virus and the host. Entry of enveloped viruses relies on specialized fusogen proteins to help merge the virus membrane with the host membrane ...

    Many viruses are enveloped by a lipid bilayer acquired during assembly, which is typically studded with one or two types of glycoproteins. These viral surface proteins act as the primary interface between the virus and the host. Entry of enveloped viruses relies on specialized fusogen proteins to help merge the virus membrane with the host membrane. In the multicomponent herpesvirus fusion machinery, glycoprotein B (gB) acts as this fusogen. Although the structure of the gB ectodomain postfusion conformation has been determined, any other conformations (e.g., prefusion, intermediate conformations) have so far remained elusive, thus restricting efforts to develop antiviral treatments and prophylactic vaccines. Here, we have characterized the full-length herpes simplex virus 1 gB in a native membrane by displaying it on cell-derived vesicles and using electron cryotomography. Alongside the known postfusion conformation, a novel one was identified. Its structure, in the context of the membrane, was determined by subvolume averaging and found to be trimeric like the postfusion conformation, but appeared more condensed. Hierarchical constrained density-fitting of domains unexpectedly revealed the fusion loops in this conformation to be apart and pointing away from the anchoring membrane. This vital observation is a substantial step forward in understanding the complex herpesvirus fusion mechanism, and opens up new opportunities for more targeted intervention of herpesvirus entry.


    Organizational Affiliation

    Oxford Particle Imaging Centre, Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, United Kingdom; kay@strubi.ox.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENVELOPE GLYCOPROTEIN BABC904Human alphaherpesvirus 1Mutation(s): 0 
Find proteins for P06437 (Human herpesvirus 1 (strain KOS))
Explore P06437 
Go to UniProtKB:  P06437
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 23.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2016-04-13
    Changes: Database references
  • Version 1.2: 2016-06-01
    Changes: Other
  • Version 1.3: 2016-06-29
    Changes: Database references
  • Version 1.4: 2017-08-02
    Changes: Data collection
  • Version 1.5: 2019-12-18
    Changes: Other