7NFA | pdb_00007nfa

The structure of the humanised A33 Fab C226S variant, an immunotherapy candidate for colorectal cancer

• PDB DOI: https://doi.org/10.2210/pdb7NFA/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli str. K-12 substr. W3110
• Mutation(s): No 


• Deposited: 2021-02-05 Released: 2022-03-02 
• Deposition Author(s): Tang, J., Zhang, C., Dalby, P., Kozielski, F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 
  0.260 (Depositor), 0.260 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.190 (DCC) 
• R-Value Observed: 
  0.197 (Depositor) 

Starting Model: experimental

Literature

The structure of the humanised A33 Fab C226S variant, an immunotherapy candidate for colorectal cancer

Tang, J., Zhang, C., Dalby, P., Kozielski, F.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 94.88 kDa 
• Atom Count: 6,612 
• Modeled Residue Count: 848 
• Deposited Residue Count: 884 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
A33 Fab light chain	A, C [auth B]	214	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
A33 Fab heavy chain	B [auth C], D	228	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free:  0.260 (Depositor), 0.260 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.190 (DCC) 
• R-Value Observed: 0.197 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.669	α = 99.71
b = 69.73	β = 101.43
c = 89.849	γ = 105.66

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
iMOSFLM	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2022-03-02 
Deposition Author(s): Tang, J., Zhang, C., Dalby, P., Kozielski, F.

Revision History  

• Version 1.0: 2022-03-02
  Type: Initial release
  
• Version 1.1: 2024-01-31
  Changes: Data collection, Refinement description
• Version 1.2: 2024-11-06
  Changes: Structure summary