Biological Assembly 1  

 3D View: Structure

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 8-mer - A4B2C2 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Hetero 8-mer -A4B4 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 94887.28 
• Atom Count: 6672 
• Residue Count: 866 
• Unique protein chains: 4

1IAI

IDIOTYPE-ANTI-IDIOTYPE FAB COMPLEX

• DOI: 10.2210/pdb1IAI/pdb

• Classification: COMPLEX (IMMUNOGLOBULIN IGG1/IGG2A)
• Organism(s): Mus musculus


• Deposited: 1993-12-28 Released: 1996-03-08 
• Deposition Author(s): Ban, N., Escobar, C., Garcia, R., Hasel, K., Day, J., Greenwood, A., McPherson, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.9 Å
• R-Value Work: 0.210 

Literature

Crystal structure of an idiotype-anti-idiotype Fab complex.

Ban, N., Escobar, C., Garcia, R., Hasel, K., Day, J., Greenwood, A., McPherson, A.

(1994) Proc.Natl.Acad.Sci.USA 91: 1604-1608

• PubMed: 8127852 
• DOI: 10.1073/pnas.91.5.1604


• PubMed Abstract: 
  

Anti-idiotypic monoclonal antibody 409.5.3 is raised against an antibody that neutralizes feline infectious peritonitis virus. This antibody, used as an immunogen, elicits the production of anti-anti-idiotypic antibodies that in turn neutralize the virus. The crystal structure of the complex between anti-idiotypic Fab 409.5.3 and idiotypic Fab fragment of virus-neutralizing antibody has been solved by molecular replacement using real-space Patterson search and filtering by Patterson correlation-coefficient refinement. The structure has been refined to an R value of 0.21 based on 21,310 unique reflections between 40.0 and 2.9 A. The three-dimensional structure reveals extensive, specific interactions that involve 118 van der Waals contacts and at least 9 probable hydrogen bonds. The two Fabs are rotated 61 degrees with respect to each other around the approximate long axis of the complex and are within 26 degrees being aligned along their major axes.

---

Related Citations: 

• Preliminary Crystallographic Study of a Complex between an Fab of a Monoclonal Feline Peritonitis Virus Neutralizing Antibody and its Anti-Idiotype Fab
  Ban, N.,Escobar, C.,Day, J.,Greenwood, A.,McPherson, A.
  (1993) J.Mol.Biol. 234: 894




---

Organizational Affiliation: 

Department of Biochemistry, University of California, Riverside 92521.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
IDIOTYPIC FAB 730.1.4 (IGG1) OF VIRUS NEUTRALIZING ANTIBODY	L	214	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
IDIOTYPIC FAB 730.1.4 (IGG1) OF VIRUS NEUTRALIZING ANTIBODY	H	219	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
ANTI-IDIOTYPIC FAB 409.5.3 (IGG2A)	M	215	Mus musculus	Mutation(s): 0  Gene Names: Igkc
Find proteins for P01837 (Mus musculus) Go to UniProtKB:  P01837

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
ANTI-IDIOTYPIC FAB 409.5.3 (IGG2A)	I	218	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.9 Å
• R-Value Work: 0.210 
• Space Group: P 2₁ 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 187.582	α = 90.00
b = 80.600	β = 90.00
c = 75.199	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-12-28 
• Released Date: 1996-03-08 
• Deposition Author(s): Ban, N., Escobar, C., Garcia, R., Hasel, K., Day, J., Greenwood, A., McPherson, A.

Revision History 

• Version 1.0: 1996-03-08
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance