6ODF

EEEV glycoproteins bound with heparan sulfate


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Cryo-EM structure of eastern equine encephalitis virus in complex with heparan sulfate analogues.

Chen, C.L.Hasan, S.S.Klose, T.Sun, Y.Buda, G.Sun, C.Klimstra, W.B.Rossmann, M.G.

(2020) Proc Natl Acad Sci U S A 117: 8890-8899

  • DOI: 10.1073/pnas.1910670117
  • Primary Citation of Related Structures:  
    6ODF

  • PubMed Abstract: 
  • Eastern equine encephalitis virus (EEEV), a mosquito-borne icosahedral alphavirus found mainly in North America, causes human and equine neurotropic infections. EEEV neurovirulence is influenced by the interaction of the viral envelope protein E2 with heparan sulfate (HS) proteoglycans from the host's plasma membrane during virus entry ...

    Eastern equine encephalitis virus (EEEV), a mosquito-borne icosahedral alphavirus found mainly in North America, causes human and equine neurotropic infections. EEEV neurovirulence is influenced by the interaction of the viral envelope protein E2 with heparan sulfate (HS) proteoglycans from the host's plasma membrane during virus entry. Here, we present a 5.8-Å cryoelectron microscopy (cryo-EM) structure of EEEV complexed with the HS analog heparin. "Peripheral" HS binding sites were found to be associated with the base of each of the E2 glycoproteins that form the 60 quasi-threefold spikes (q3) and the 20 sites associated with the icosahedral threefold axes (i3). In addition, there is one HS site at the vertex of each q3 and i3 spike (the "axial" sites). Both the axial and peripheral sites are surrounded by basic residues, suggesting an electrostatic mechanism for HS binding. These residues are highly conserved among EEEV strains, and therefore a change in these residues might be linked to EEEV neurovirulence.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, IN 47907.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
E1A, C, E, G441Eastern equine encephalitis virusMutation(s): 0 
EC: 3.4.21.90
UniProt
Find proteins for Q4QXJ7 (Eastern equine encephalitis virus (strain Florida 91-469))
Explore Q4QXJ7 
Go to UniProtKB:  Q4QXJ7
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
E2B, D, F, H420Eastern equine encephalitis virusMutation(s): 0 
EC: 3.4.21.90
UniProt
Find proteins for Q4QXJ7 (Eastern equine encephalitis virus (strain Florida 91-469))
Explore Q4QXJ7 
Go to UniProtKB:  Q4QXJ7
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-O-sulfo-beta-L-galactopyranuronic acid-(1-4)-[(2R,3R,4R,5R,6R)-2,4,5-trihydroxy-6-(sulfooxy)tetrahydro-2H-pyran-3-yl]sulfamic acidI, J, K, L, M, N2N/AN/A Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR01AI095366

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-01
    Type: Initial release
  • Version 1.1: 2020-04-22
    Changes: Database references
  • Version 1.2: 2020-05-06
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary