9CPP | pdb_00009cpp

Crystal structure of SARS-CoV-2 receptor binding domain in complex with antibodies M22-17 and CC12.3

• PDB DOI: https://doi.org/10.2210/pdb9CPP/pdb

• Classification: Viral Protein/IMMUNE SYSTEM
• Organism(s): Severe acute respiratory syndrome coronavirus 2, Homo sapiens, Mus musculus
• Expression System: Spodoptera frugiperda, Homo sapiens
• Mutation(s): No 


• Deposited: 2024-07-18 Released: 2025-06-25 
• Deposition Author(s): Feng, Z., Wilson, I.A.
• Funding Organization(s): Bill & Melinda Gates Foundation

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.19 Å
• R-Value Free: 
  0.279 (Depositor), 0.279 (DCC) 
• R-Value Work: 
  0.232 (Depositor), 0.232 (DCC) 
• R-Value Observed: 
  0.234 (Depositor) 

Starting Model: experimental

Literature

Structures of CR3022-like antibodies

Feng, Z., Wilson, I.A.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A2B1C1D1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 5-mer - A4B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 118.6 kDa 
• Atom Count: 8,111 
• Modeled Residue Count: 1,049 
• Deposited Residue Count: 1,081 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spike protein S1	A	205	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 0
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTC2  Go to UniProtKB:  P0DTC2
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P0DTC2-1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CC12.3 Fab heavy chain	B [auth F]	220	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
CC12.3 Fab light chain	C [auth G]	214	Homo sapiens	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
M22-17 Fab heavy chain	D [auth H]	222	Mus musculus	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
M22-17 Fab light chain	E [auth L]	220	Mus musculus	Mutation(s): 0

Oligosaccharides

Help

Entity ID: 6
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	F [auth B]	3		N-Glycosylation

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CIT	G [auth A], H [auth A]	CITRIC ACID C6 H8 O7 KRKNYBCHXYNGOX-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.19 Å
• R-Value Free:  0.279 (Depositor), 0.279 (DCC) 
• R-Value Work:  0.232 (Depositor), 0.232 (DCC) 
• R-Value Observed: 0.234 (Depositor) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.267	α = 90
b = 110.267	β = 90
c = 225.451	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-06-25 
Deposition Author(s): Feng, Z., Wilson, I.A.

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Funding Organization	Location	Grant Number
Bill & Melinda Gates Foundation	United States	INV-004923

Revision History  

• Version 1.0: 2025-06-25
  Type: Initial release