6ARP | pdb_00006arp

Structure of a mutant Cetuximab Fab fragment

• PDB DOI: https://doi.org/10.2210/pdb6ARP/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2017-08-23 Released: 2018-08-29 
• Deposition Author(s): Christie, M., Christ, D.
• Funding Organization(s): Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.197 (Depositor), 0.205 (DCC) 
• R-Value Work: 
  0.172 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.173 (Depositor) 

Starting Model: experimental

Literature

Structure of a mutant Cetuximab Fab fragment

Christie, M., Christ, D.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly Evidence: homology

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content 

• Total Structure Weight: 95.7 kDa 
• Atom Count: 7,641 
• Modeled Residue Count: 857 
• Deposited Residue Count: 872 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cetuximab mutant light chain,Uncharacterized protein	A [auth C], C [auth A]	214	Homo sapiens	Mutation(s): 0
UniProt
Find proteins for Q8TCD0 (Homo sapiens) Explore Q8TCD0  Go to UniProtKB:  Q8TCD0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cetuximab mutant Fab heavy chain,Immunoglobulin gamma-1 heavy chain	B [auth D], D [auth B]	222	Homo sapiens	Mutation(s): 0
UniProt
Find proteins for P0DOX5 (Homo sapiens) Explore P0DOX5  Go to UniProtKB:  P0DOX5

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E [auth C], F [auth C], H [auth D], M [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	G [auth C], I [auth D], J [auth D], K [auth D], L [auth D], N [auth B], O [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.197 (Depositor), 0.205 (DCC) 
• R-Value Work:  0.172 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.173 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.06	α = 90
b = 83.07	β = 90
c = 211.6	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2018-08-29 
Deposition Author(s): Christie, M., Christ, D.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	DE160100608
Australian Research Council (ARC)	Australia	DP160104915

Revision History  

• Version 1.0: 2018-08-29
  Type: Initial release
  
• Version 1.1: 2020-01-01
  Changes: Author supporting evidence
• Version 1.2: 2023-10-04
  Changes: Data collection, Database references, Refinement description
• Version 1.3: 2024-11-20
  Changes: Structure summary