Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 168.30 kDa 
• Atom Count: 3621 
• Modelled Residue Count: 475 
• Deposited Residue Count: 1503 
• Unique protein chains: 3

7TLZ

SARS-CoV-2 S NTD B.1.1.529 Omicron variant + S309 Local Refinement

• PDB DOI: 10.2210/pdb7TLZ/pdb
• EM Map EMD-25991: EMDB EMDataResource

• Classification: VIRUS/IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): Yes 


• Deposited: 2022-01-19 Released: 2022-02-02 
• Deposition Author(s): McCallum, M., Veesler, D., Seattle Structural Genomics Center for Infectious Disease (SSGCID)
• Funding Organization(s): Howard Hughes Medical Institute (HHMI)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural basis of SARS-CoV-2 Omicron immune evasion and receptor engagement.

McCallum, M., Czudnochowski, N., Rosen, L.E., Zepeda, S.K., Bowen, J.E., Walls, A.C., Hauser, K., Joshi, A., Stewart, C., Dillen, J.R., Powell, A.E., Croll, T.I., Nix, J., Virgin, H.W., Corti, D., Snell, G., Veesler, D.

(2022) Science 375: 864-868

• PubMed: 35076256 
• DOI: 10.1126/science.abn8652
• Primary Citation of Related Structures:  
  7TLY, 7TLZ, 7TM0, 7TN0


• PubMed Abstract: 
  

The SARS-CoV-2 Omicron variant of concern evades antibody-mediated immunity that comes from vaccination or infection with earlier variants due to accumulation of numerous spike mutations. To understand the Omicron antigenic shift, we determined cryo-electron microscopy and X-ray crystal structures of the spike protein and the receptor-binding domain bound to the broadly neutralizing sarbecovirus monoclonal antibody (mAb) S309 (the parent mAb of sotrovimab) and to the human ACE2 receptor. We provide a blueprint for understanding the marked reduction of binding of other therapeutic mAbs that leads to dampened neutralizing activity. Remodeling of interactions between the Omicron receptor-binding domain and human ACE2 likely explains the enhanced affinity for the host receptor relative to the ancestral virus.

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Organizational Affiliation: 

Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
S2L20 Fab light chain	A	107	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
S2L20 Fab heavy chain	B	122	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Spike glycoprotein	C [auth J]	1274	Homo sapiens	Mutation(s): 40  Gene Names: S, 2
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTC2  Go to UniProtKB:  P0DTC2

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	D [auth J], E [auth J], F [auth J], G [auth J], H [auth J], I [auth J]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2022-01-19 
• Released Date: 2022-02-02 
Deposition Author(s): McCallum, M., Veesler, D., Seattle Structural Genomics Center for Infectious Disease (SSGCID)

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Funding Organization	Location	Grant Number
Howard Hughes Medical Institute (HHMI)	United States	--

Revision History  

• Version 1.0: 2022-02-02
  Type: Initial release
  
• Version 1.1: 2022-02-09
  Changes: Database references
• Version 1.2: 2022-03-09
  Changes: Database references