5C6T

Crystal structure of HCMV glycoprotein B in complex with 1G2 Fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

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Literature

Structure of HCMV glycoprotein B in the postfusion conformation bound to a neutralizing human antibody.

Chandramouli, S.Ciferri, C.Nikitin, P.A.Calo, S.Gerrein, R.Balabanis, K.Monroe, J.Hebner, C.Lilja, A.E.Settembre, E.C.Carfi, A.

(2015) Nat Commun 6: 8176-8176

  • DOI: 10.1038/ncomms9176
  • Primary Citation of Related Structures:  
    5C6T

  • PubMed Abstract: 
  • Human cytomegalovirus (HCMV) poses a significant threat to immunocompromised individuals and neonates infected in utero. Glycoprotein B (gB), the herpesvirus fusion protein, is a target for neutralizing antibodies and a vaccine candidate due to its indispensable role in infection ...

    Human cytomegalovirus (HCMV) poses a significant threat to immunocompromised individuals and neonates infected in utero. Glycoprotein B (gB), the herpesvirus fusion protein, is a target for neutralizing antibodies and a vaccine candidate due to its indispensable role in infection. Here we show the crystal structure of the HCMV gB ectodomain bound to the Fab fragment of 1G2, a neutralizing human monoclonal antibody isolated from a seropositive subject. The gB/1G2 interaction is dominated by aromatic residues in the 1G2 heavy chain CDR3 protruding into a hydrophobic cleft in the gB antigenic domain 5 (AD-5). Structural analysis and comparison with HSV gB suggest the location of additional neutralizing antibody binding sites on HCMV gB. Finally, immunoprecipitation experiments reveal that 1G2 can bind to HCMV virion gB suggesting that its epitope is exposed and accessible on the virus surface. Our data will support the development of vaccines and therapeutic antibodies against HCMV infection.


    Organizational Affiliation

    GSK Vaccines, 45 Sidney Street, Cambridge, Massachusetts 02139, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Envelope glycoprotein BA636Human herpesvirus 5 strain TowneMutation(s): 7 
Gene Names: gBUL55
Find proteins for P13201 (Human cytomegalovirus (strain Towne))
Explore P13201 
Go to UniProtKB:  P13201
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
1G2 Fab heavy chainH233Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
1G2 Fab light chainL214Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
B
2 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 176.486α = 90
b = 176.486β = 90
c = 176.486γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-23
    Type: Initial release
  • Version 1.1: 2017-11-01
    Changes: Author supporting evidence, Derived calculations
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary