1HIL

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.195 

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This is version 1.2 of the entry. See complete history. 

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

  • Primary Citation of Related Structures:  

  • 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 ...

    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.

    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

    Organizational Affiliation: 

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IGG2A-KAPPA 17/9 FAB (LIGHT CHAIN)
A, C
217N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IGG2A-KAPPA 17/9 FAB (HEAVY CHAIN)
B, D
220N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 90.040α = 90.00
b = 82.800β = 122.60
c = 73.400γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

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