1AR2

DISULFIDE-FREE IMMUNOGLOBULIN FRAGMENT

• PDB DOI: https://doi.org/10.2210/pdb1AR2/pdb

• Classification: IMMUNOGLOBULIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1997-08-08 Released: 1997-11-12 
• Deposition Author(s): Uson, I., Bes, M.T., Sheldrick, G.M., Schneider, T.R., Hartsch, T., Fritz, H.-J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.415 
• R-Value Observed: 0.254 

Literature

X-ray crystallography reveals stringent conservation of protein fold after removal of the only disulfide bridge from a stabilized immunoglobulin variable domain.

Uson, I., Bes, M.T., Sheldrick, G.M., Schneider, T.R., Hartsch, T., Fritz, H.J.

(1997) Structure 2: 357-361

• PubMed: 9427009 
• DOI: https://doi.org/10.1016/S1359-0278(97)00049-7
• Primary Citation of Related Structures:  
  1AR2


• PubMed Abstract: 
  

  Immunoglobulin domains owe a crucial fraction of their conformational stability to an invariant central disulfide bridge, the closure of which requires oxidation. Under the reducing conditions prevailing in cell cytoplasm, accumulation of soluble immunoglobulin is prohibited by its inability to acquire and maintain the native conformation. Previously, we have shown that disulfide-free immunoglobulins can be produced in Escherichia coli and purified from cytoplasmic extracts.

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Organizational Affiliation: 

Institut für Anorganische Chemie der Universität, Göttingen, Germany. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 11.92 kDa 
• Atom Count: 857 
• Modelled Residue Count: 109 
• Deposited Residue Count: 109 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REI	A	109	Homo sapiens	Mutation(s): 2
UniProt & NIH Common Fund Data Resources
Find proteins for P01593 (Homo sapiens) Explore P01593  Go to UniProtKB:  P01593
GTEx:  ENSG00000239975

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.415 
• R-Value Observed: 0.254 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.8	α = 90
b = 52.8	β = 90
c = 158.2	γ = 120

Software Package:

Software Name	Purpose
SHELXL-97	model building
SHELXL-97	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHELXL-97	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-11-12 
Deposition Author(s): Uson, I., Bes, M.T., Sheldrick, G.M., Schneider, T.R., Hartsch, T., Fritz, H.-J.

Revision History  

• Version 1.0: 1997-11-12
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-11-03
  Changes: Data collection, Database references, Other
• Version 1.4: 2023-08-02
  Changes: Refinement description