6ILM

Cryo-EM structure of Echovirus 6 complexed with its uncoating receptor FcRn at PH 7.4


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 1.4 of the entry. See complete history


Literature

Human Neonatal Fc Receptor Is the Cellular Uncoating Receptor for Enterovirus B.

Zhao, X.Zhang, G.Liu, S.Chen, X.Peng, R.Dai, L.Qu, X.Li, S.Song, H.Gao, Z.Yuan, P.Liu, Z.Li, C.Shang, Z.Li, Y.Zhang, M.Qi, J.Wang, H.Du, N.Wu, Y.Bi, Y.Gao, S.Shi, Y.Yan, J.Zhang, Y.Xie, Z.Wei, W.Gao, G.F.

(2019) Cell 177: 1553-1565.e16

  • DOI: https://doi.org/10.1016/j.cell.2019.04.035
  • Primary Citation of Related Structures:  
    6ILJ, 6ILK, 6ILL, 6ILM, 6ILN, 6ILO, 6ILP

  • PubMed Abstract: 

    Enterovirus B (EV-B), a major proportion of the genus Enterovirus in the family Picornaviridae, is the causative agent of severe human infectious diseases. Although cellular receptors for coxsackievirus B in EV-B have been identified, receptors mediating virus entry, especially the uncoating process of echovirus and other EV-B remain obscure. Here, we found that human neonatal Fc receptor (FcRn) is the uncoating receptor for major EV-B. FcRn binds to the virus particles in the "canyon" through its FCGRT subunit. By obtaining multiple cryo-electron microscopy structures at different stages of virus entry at atomic or near-atomic resolution, we deciphered the underlying mechanisms of enterovirus attachment and uncoating. These structures revealed that different from the attachment receptor CD55, binding of FcRn to the virions induces efficient release of "pocket factor" under acidic conditions and initiates the conformational changes in viral particle, providing a structural basis for understanding the mechanisms of enterovirus entry.


  • Organizational Affiliation

    CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, 100101 Beijing, China; CAS Center for Influenza Research and Early-Warning (CASCIRE), Chinese Academy of Sciences, 100101 Beijing, China.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein VP1289Echovirus E6Mutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein VP2252Echovirus E6Mutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein VP3238Echovirus E6Mutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein VP468Echovirus E6Mutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
IgG receptor FcRn large subunit p51263Homo sapiensMutation(s): 0 
Gene Names: FCRN
UniProt & NIH Common Fund Data Resources
Find proteins for P55899 (Homo sapiens)
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Go to UniProtKB:  P55899
PHAROS:  P55899
GTEx:  ENSG00000104870 
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UniProt GroupP55899
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulin99Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
PHAROS:  P61769
GTEx:  ENSG00000166710 
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UniProt GroupP61769
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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
Chinese Academy of SciencesChinaXDB29010000

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-05-29
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-05
    Changes: Data collection, Database references
  • Version 1.3: 2019-06-12
    Changes: Data collection, Database references
  • Version 1.4: 2019-11-06
    Changes: Data collection, Other