Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 95.18 kDa 
• Atom Count: 6765 
• Residue Count: 862 
• Unique protein chains: 2

1HIL

STRUCTURAL EVIDENCE FOR INDUCED FIT AS A MECHANISM FOR ANTIGEN-ANTIBODY RECOGNITION

• DOI: 10.2210/pdb1HIL/pdb

• Classification: IMMUNOGLOBULIN
• Organism(s): Mus musculus
• Mutation(s): No 


• Deposited: 1992-07-08 Released: 1994-01-31 
• Deposition Author(s): Rini, J.M., Wilson, I.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.195 
• R-Value Observed: 0.195 

Literature

Structural evidence for induced fit as a mechanism for antibody-antigen recognition.

Rini, J.M., Schulze-Gahmen, U., Wilson, I.A.

(1992) Science 255: 959-965

• PubMed: 1546293 
• DOI: 10.1126/science.1546293
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The three-dimensional structure of a specific antibody (Fab 17/9) to a peptide immunogen from influenza virus hemagglutinin [HA1(75-110)] and two independent crystal complexes of this antibody with bound peptide (TyrP100-LeuP108) have been determined by x-ray crystallographic techniques at 2.0 A, 2.9 A, and 3.1 A resolution, respectively. The nonapeptide antigen assumes a type I beta turn in the antibody combining site and interacts primarily with the Fab hypervariable loops L3, H2, and H3. Comparison of the bound and unbound Fab structures shows that a major rearrangement in the H3 loop accompanies antigen binding. This conformational change results in the creation of a binding pocket for the beta turn of the peptide, allowing TyrP105 to be accommodated. The conformation of the peptide bound to the antibody shows similarity to its cognate sequence in the HA1, suggesting a possible mechanism for the cross-reactivity of this Fab with monomeric hemagglutinin. The structures of the free and antigen bound antibodies demonstrate the flexibility of the antibody combining site and provide an example of induced fit as a mechanism for antibody-antigen recognition.

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Related Citations: 

• Preliminary Crystallographic Data, Primary Sequence and Binding Data for an Anti-Peptide Fab and its Complex with a Synthetic Peptide from Influenza Virus Hemagglutinin
  Schulze-Gahmen, U., Rini, J.M., Arevalo, J., Stura, E.A., Kenten, J.H., Wilson, I.A.
  (1988) J Biol Chem 263: 17100

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Organizational Affiliation: 

Department of Molecular Biology, Scripps Research Institute, La Jolla, CA 92037.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
IGG2A-KAPPA 17/9 FAB (LIGHT CHAIN)	A, C	217	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
IGG2A-KAPPA 17/9 FAB (HEAVY CHAIN)	B, D	220	Mus musculus	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.195 
• R-Value Observed: 0.195 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.04	α = 90
b = 82.8	β = 122.6
c = 73.4	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1992-07-08 
• Released Date: 1994-01-31 
Deposition Author(s): Rini, J.M., Wilson, I.A.

Revision History 

• Version 1.0: 1994-01-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance