4KAQ | pdb_00004kaq

Structure of rituximab Fab

• PDB DOI: https://doi.org/10.2210/pdb4KAQ/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens, Mus musculus
• Mutation(s): No 


• Deposited: 2013-04-22 Released: 2014-12-24 
• Deposition Author(s): Bzymek, K.P., Williams, J.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 
  0.230 (Depositor), 0.230 (DCC) 
• R-Value Work: 
  0.180 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.182 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of rituximab

Bzymek, K.P., Williams, J.C.

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)

Macromolecule Content 

• Total Structure Weight: 46.8 kDa 
• Atom Count: 3,518 
• Modeled Residue Count: 432 
• Deposited Residue Count: 437 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Rituximab light chain	A [auth L]	213	Homo sapiens, Mus musculus This entity is chimeric	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Rituximab heavy chain	B [auth H]	224	Homo sapiens, Mus musculus This entity is chimeric	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	B [auth H]	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free:  0.230 (Depositor), 0.230 (DCC) 
• R-Value Work:  0.180 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.182 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.65	α = 90
b = 93.93	β = 90
c = 144.39	γ = 90

Software Package:

Software Name	Purpose
CrystalClear	data collection
PHASER	phasing
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-12-24 
Deposition Author(s): Bzymek, K.P., Williams, J.C.

Revision History  

• Version 1.0: 2014-12-24
  Type: Initial release
  
• Version 2.0: 2019-12-25
  Changes: Derived calculations, Polymer sequence
• Version 2.1: 2023-09-20
  Changes: Data collection, Database references, Refinement description
• Version 2.2: 2024-10-30
  Changes: Structure summary