8B9F image
Entry Detail
PDB ID:
8B9F
EMDB ID:
Keywords:
Title:
Structure of Echovirus 11 complexed with DAF (CD55) calculated from symmetry expansion
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-10-05
Release Date:
2022-12-07
Method Details:
Experimental Method:
Resolution:
3.93 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Genome polyprotein
Chain IDs:D (auth: A)
Chain Length:287
Number of Molecules:1
Biological Source:Echovirus E11
Polymer Type:polypeptide(L)
Description:Genome polyprotein
Chain IDs:B
Chain Length:262
Number of Molecules:1
Biological Source:Echovirus E11
Polymer Type:polypeptide(L)
Description:Genome polyprotein
Chain IDs:C
Chain Length:238
Number of Molecules:1
Biological Source:Echovirus E11
Polymer Type:polypeptide(L)
Description:Complement decay-accelerating factor
Chain IDs:A (auth: E)
Chain Length:268
Number of Molecules:1
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET modified residue
Ligand Molecules
Primary Citation
Switching of Receptor Binding Poses between Closely Related Enteroviruses.
Viruses 14 ? ? (2022)
PMID: 36560629 DOI: 10.3390/v14122625

Abstact

Echoviruses, for which there are currently no approved vaccines or drugs, are responsible for a range of human diseases, for example echovirus 11 (E11) is a major cause of serious neonatal morbidity and mortality. Decay-accelerating factor (DAF, also known as CD55) is an attachment receptor for E11. Here, we report the structure of the complex of E11 and the full-length ectodomain of DAF (short consensus repeats, SCRs, 1-4) at 3.1 Å determined by cryo-electron microscopy (cryo-EM). SCRs 3 and 4 of DAF interact with E11 at the southern rim of the canyon via the VP2 EF and VP3 BC loops. We also observe an unexpected interaction between the N-linked glycan (residue 95 of DAF) and the VP2 BC loop of E11. DAF is a receptor for at least 20 enteroviruses and we classify its binding patterns from reported DAF/virus complexes into two distinct positions and orientations, named as E6 and E11 poses. Whilst 60 DAF molecules can attach to the virion in the E6 pose, no more than 30 can attach to E11 due to steric restrictions. Analysis of the distinct modes of interaction and structure and sequence-based phylogenies suggests that the two modes evolved independently, with the E6 mode likely found earlier.

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Disease

Primary Citation of related structures