Biological Assembly 1  

 3D View: Structure

Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 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: 46.54 kDa 
• Atom Count: 3273 
• Residue Count: 423 
• Unique protein chains: 2

1GHF

ANTI-ANTI-IDIOTYPE GH1002 FAB FRAGMENT

• DOI: 10.2210/pdb1GHF/pdb

• Classification: ANTIBODY FAB FRAGMENT
• Organism(s): Mus musculus
• Mutation(s): No 


• Deposited: 1995-11-30 Released: 1996-12-23 
• Deposition Author(s): Ban, N., Day, J., Wang, X., Ferrone, S., McPherson, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 

Literature

Crystal structure of an anti-anti-idiotype shows it to be self-complementary.

Ban, N., Day, J., Wang, X., Ferrone, S., McPherson, A.

(1996) J Mol Biol 255: 617-627

• PubMed: 8568901 
• DOI: 10.1006/jmbi.1996.0051
• Primary Citation of Related Structures:  
  1GHF


• PubMed Abstract: 
  

The structure of the Fab fragment of the mouse anti-anti-idiotypic monoclonal antibody (mAb) GH1002 was solved by X-ray crystallography. mAb GH1002 was elicited with the syngeneic anti-idiotype mAb MK2-23 which mimics the determinant defined by anti-human high molecular weight-melanoma associated antigen (HMW-MAA) mAb 763.74. The Fab fragments of mAb GH1002 exist in the crystal as dimers related by crystallographic 2-fold axes. The interface between dyad-related Fab fragments is formed primarily by interaction of the hypervariable loops of one with the other. The self-interaction of Fab fragments of anti-anti-idiotypic mAb GH1002 through their combining sites is extremely tight and intricate, closely resembling that observed in structures of id-anti-id complexes, and comparable in terms of total contact area, charge complementarity, and number of hydrogen bonds. The self-complementarity of the antibody observed here could be coincidental and thus reflect some non-specific binding capability. It might, on the other hand, be immunologically relevant and exemplify a certain degree of evolved self complementarity characteristic of antibodies participating in idiotypic cascades.

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Organizational Affiliation: 

Department of Biochemistry, University of California at Riverside 92521, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANTI-ANTI-IDIOTYPE GH1002 FAB FRAGMENT	L	211	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ANTI-ANTI-IDIOTYPE GH1002 FAB FRAGMENT	H	212	Mus musculus	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Work: 0.210 
• R-Value Observed: 0.210 
• Space Group: P 4 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 150.4	α = 90
b = 150.4	β = 90
c = 43	γ = 90

Software Package:

Software Name	Purpose
HOWARD	data collection
NIELSEN	data collection
X-PLOR	model building
X-PLOR	refinement
XENGEN	data reduction
NIELSEN	data reduction
XUONG)	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-11-30 
• Released Date: 1996-12-23 
Deposition Author(s): Ban, N., Day, J., Wang, X., Ferrone, S., McPherson, A.

Revision History 

• Version 1.0: 1996-12-23
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance