6I2K

Structure of EV71 complexed with its receptor SCARB2

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 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

Unexpected mode of engagement between enterovirus 71 and its receptor SCARB2.

Zhou, D., Zhao, Y., Kotecha, A., Fry, E.E., Kelly, J.T., Wang, X., Rao, Z., Rowlands, D.J., Ren, J., Stuart, D.I.

(2019) Nat Microbiol 4: 414-419

  • DOI: 10.1038/s41564-018-0319-z
  • Primary Citation of Related Structures:  
    6I2K

  • PubMed Abstract: 

    • Enterovirus 71 (EV71) is a common cause of hand, foot and mouth disease-a disease endemic especially in the Asia-Pacific region 1 . Scavenger receptor class B member 2 (SCARB2) is the major receptor of EV71, as well as several other enteroviruses responsible for hand, foot and mouth disease, and plays a key role in cell entry 2 ...

    Enterovirus 71 (EV71) is a common cause of hand, foot and mouth disease-a disease endemic especially in the Asia-Pacific region 1 . Scavenger receptor class B member 2 (SCARB2) is the major receptor of EV71, as well as several other enteroviruses responsible for hand, foot and mouth disease, and plays a key role in cell entry 2 . The isolated structures of EV71 and SCARB2 are known 3-6 , but how they interact to initiate infection is not. Here, we report the EV71-SCARB2 complex structure determined at 3.4 Å resolution using cryo-electron microscopy. This reveals that SCARB2 binds EV71 on the southern rim of the canyon, rather than across the canyon, as predicted 3,7,8 . Helices 152-163 (α5) and 183-193 (α7) of SCARB2 and the viral protein 1 (VP1) GH and VP2 EF loops of EV71 dominate the interaction, suggesting an allosteric mechanism by which receptor binding might facilitate the low-pH uncoating of the virus in the endosome/lysosome. Remarkably, many residues within the binding footprint are not conserved across SCARB2-dependent enteroviruses; however, a conserved proline and glycine seem to be key residues. Thus, although the virus maintains antigenic variability even within the receptor-binding footprint, the identification of binding 'hot spots' may facilitate the design of receptor mimic therapeutics less likely to quickly generate resistance.

    Organizational Affiliation: 

    Diamond Light Source, Didcot, UK. dave@strubi.ox.ac.uk.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polyprotein A297Enterovirus A71Mutation(s): 0 
EC: 3.4.22.29 (UniProt), 3.6.1.15 (UniProt), 3.4.22.28 (UniProt), 2.7.7.48 (UniProt)
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
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Go to UniProtKB:  Q66479
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Polyprotein B254Enterovirus A71Mutation(s): 0 
EC: 3.4.22.29 (UniProt), 3.6.1.15 (UniProt), 3.4.22.28 (UniProt), 2.7.7.48 (UniProt)
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Polyprotein C242Enterovirus A71Mutation(s): 0 
EC: 3.4.22.29 (UniProt), 3.6.1.15 (UniProt), 3.4.22.28 (UniProt), 2.7.7.48 (UniProt)
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Polyprotein D58Enterovirus A71Mutation(s): 0 
EC: 3.4.22.29 (UniProt), 3.6.1.15 (UniProt), 3.4.22.28 (UniProt), 2.7.7.48 (UniProt)
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
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Go to UniProtKB:  Q66479
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Lysosome membrane protein 2 E416Homo sapiensMutation(s): 0 
Gene Names: SCARB2, CD36L2, LIMP2, LIMPII
Find proteins for Q14108 (Homo sapiens)
Explore Q14108 
Go to UniProtKB:  Q14108
NIH Common Fund Data Resources
PHAROS:  Q14108
GTEx:  ENSG00000138760
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 6
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
F
4 N-Glycosylation Oligosaccharides Interaction
Entity ID: 7
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G, I
2 N-Glycosylation Oligosaccharides Interaction
Entity ID: 8
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
H
3 N-Glycosylation Oligosaccharides Interaction
Entity ID: 9
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
J
11 N-Glycosylation Oligosaccharides Interaction
Entity ID: 10
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
K
5 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
906
Query on 906
Download Ideal Coordinates CCD File 
A
1-(2-aminopyridin-4-yl)-3-[(3S)-5-{4-[(E)-(ethoxyimino)methyl]phenoxy}-3-methylpentyl]imidazolidin-2-one
C23 H31 N5 O3
SRJKGDFZRYDLKM-WYZSWBMLSA-N		 Ligand Interaction
NAG
Query on NAG
Download Ideal Coordinates CCD File 
E
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/N00065X/1

Revision History  (Full details and data files)

  • Version 1.0: 2018-11-28
    Type: Initial release
  • Version 1.1: 2018-12-19
    Changes: Data collection, Database references
  • Version 1.2: 2019-03-06
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary