2GJ7

Crystal Structure of a gE-gI/Fc complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.00 Å

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Literature

Crystal Structure of the HSV-1 Fc Receptor Bound to Fc Reveals a Mechanism for Antibody Bipolar Bridging.

Sprague, E.R.Wang, C.Baker, D.Bjorkman, P.J.

(2006) PLoS Biol 4: 1-12

  • DOI: 10.1371/journal.pbio.0040148
  • Primary Citation of Related Structures:  
    2GIY, 2GJ7

  • PubMed Abstract: 
  • Herpes simplex virus type-1 expresses a heterodimeric Fc receptor, gE-gI, on the surfaces of virions and infected cells that binds the Fc region of host immunoglobulin G and is implicated in the cell-to-cell spread of virus. gE-gI binds immunoglobulin G at the basic pH of the cell surface and releases it at the acidic pH of lysosomes, consistent with a role in facilitating the degradation of antiviral antibodies ...

    Herpes simplex virus type-1 expresses a heterodimeric Fc receptor, gE-gI, on the surfaces of virions and infected cells that binds the Fc region of host immunoglobulin G and is implicated in the cell-to-cell spread of virus. gE-gI binds immunoglobulin G at the basic pH of the cell surface and releases it at the acidic pH of lysosomes, consistent with a role in facilitating the degradation of antiviral antibodies. Here we identify the C-terminal domain of the gE ectodomain (CgE) as the minimal Fc-binding domain and present a 1.78-angstroms CgE structure. A 5-angstroms gE-gI/Fc crystal structure, which was independently verified by a theoretical prediction method, reveals that CgE binds Fc at the C(H)2-C(H)3 interface, the binding site for several mammalian and bacterial Fc-binding proteins. The structure identifies interface histidines that may confer pH-dependent binding and regions of CgE implicated in cell-to-cell spread of virus. The ternary organization of the gE-gI/Fc complex is compatible with antibody bipolar bridging, which can interfere with the antiviral immune response.


    Organizational Affiliation

    Division of Biology, California Institute of Technology, Pasadena, California, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ig gamma-1 chain C regionAB227Homo sapiensMutation(s): 0 
Gene Names: IgG1 heavy chainIGHG1
Find proteins for P01857 (Homo sapiens)
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Go to UniProtKB:  P01857
NIH Common Fund Data Resources
PHAROS  P01857
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Glycoprotein EEF401Human alphaherpesvirus 1 strain KOSMutation(s): 0 
Gene Names: gEUS8
Find proteins for P04488 (Human herpesvirus 1 (strain 17))
Explore P04488 
Go to UniProtKB:  P04488
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
8 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.00 Å
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 174.726α = 90
b = 174.726β = 90
c = 315.997γ = 90
Software Package:
Software NamePurpose
PHASERphasing
SOLVEphasing
PDB_EXTRACTdata extraction
Blu-Icedata collection
DENZOdata reduction
SCALEPACKdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-30
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary