5IW3 | pdb_00005iw3

anti-CD20 monoclonal antibody Fc fragment

• PDB DOI: https://doi.org/10.2210/pdb5IW3/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Bos taurus
• Mutation(s): Yes 


• Deposited: 2016-03-21 Released: 2017-03-29 
• Deposition Author(s): Tang, C., Chen, Z.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 
  0.207 (Depositor), 0.200 (DCC) 
• R-Value Work: 
  0.189 (Depositor), 0.200 (DCC) 
• R-Value Observed: 
  0.190 (Depositor) 

Starting Model: experimental

Literature

Structure of anti-CD20 monoclonal antibody Fc fragment at 2.05 Angstroms resolution

Tang, C., Chen, Z.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 25.52 kDa 
• Atom Count: 1,988 
• Modeled Residue Count: 208 
• Deposited Residue Count: 208 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ig gamma-1 chain C region	A	208	Homo sapiens	Mutation(s): 2  Gene Names: IGHG1
UniProt & NIH Common Fund Data Resources
Find proteins for P01857 (Homo sapiens) Explore P01857  Go to UniProtKB:  P01857
PHAROS:  P01857 GTEx:  ENSG00000211896
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P01857-2

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	B	8		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G89993FE GlyCosmos:  G89993FE GlyGen:  G89993FE

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A], E [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ACT	F [auth A], G [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free:  0.207 (Depositor), 0.200 (DCC) 
• R-Value Work:  0.189 (Depositor), 0.200 (DCC) 
• R-Value Observed: 0.190 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.158	α = 90
b = 143.096	β = 90
c = 56.556	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-03-29 
Deposition Author(s): Tang, C., Chen, Z.

Revision History  

• Version 1.0: 2017-03-29
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary
• Version 2.2: 2024-10-16
  Changes: Structure summary