6ZXN

Cryo-EM structure of the SARS-CoV-2 spike protein bound to neutralizing nanobodies (Ty1)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.93 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

An alpaca nanobody neutralizes SARS-CoV-2 by blocking receptor interaction.

Hanke, L.Vidakovics Perez, L.Sheward, D.J.Das, H.Schulte, T.Moliner-Morro, A.Corcoran, M.Achour, A.Karlsson Hedestam, G.B.Hallberg, B.M.Murrell, B.McInerney, G.M.

(2020) Nat Commun 11: 4420-4420

  • DOI: 10.1038/s41467-020-18174-5
  • Primary Citation of Related Structures:  
    6ZXN

  • PubMed Abstract: 
  • SARS-CoV-2 enters host cells through an interaction between the spike glycoprotein and the angiotensin converting enzyme 2 (ACE2) receptor. Directly preventing this interaction presents an attractive possibility for suppressing SARS-CoV-2 replication ...

    SARS-CoV-2 enters host cells through an interaction between the spike glycoprotein and the angiotensin converting enzyme 2 (ACE2) receptor. Directly preventing this interaction presents an attractive possibility for suppressing SARS-CoV-2 replication. Here, we report the isolation and characterization of an alpaca-derived single domain antibody fragment, Ty1, that specifically targets the receptor binding domain (RBD) of the SARS-CoV-2 spike, directly preventing ACE2 engagement. Ty1 binds the RBD with high affinity, occluding ACE2. A cryo-electron microscopy structure of the bound complex at 2.9 Å resolution reveals that Ty1 binds to an epitope on the RBD accessible in both the 'up' and 'down' conformations, sterically hindering RBD-ACE2 binding. While fusion to an Fc domain renders Ty1 extremely potent, Ty1 neutralizes SARS-CoV-2 spike pseudovirus as a 12.8 kDa nanobody, which can be expressed in high quantities in bacteria, presenting opportunities for manufacturing at scale. Ty1 is therefore an excellent candidate as an intervention against COVID-19.


    Related Citations: 
    • An alpaca nanobody neutralizes SARS-CoV-2 by blocking receptor interaction
      Hanke, L., Vidakovics, L., Sheward, D.J., Schulte, T., Moliner Morro, A., Corcoran, M., Achour, A., Karlsson Hedestam, G., Hallberg, B.M., Murrell, B., McInerney, G.M.
      (2020) Biorxiv --: --

    Organizational Affiliation

    Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden. gerald.mcinerney@ki.se.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Spike glycoproteinABC1288Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: S2
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2)
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Go to UniProtKB:  P0DTC2
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody Ty1DEF134Vicugna pacosMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G, H, I, J, K, L, M, N, O, P, Q, R
2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

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A, B, C
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: 2.93 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2020-09-23
    Type: Initial release