1NDG

Crystal structure of Fab fragment of antibody HyHEL-8 complexed with its antigen lysozyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

X-ray snapshots of the maturation of an antibody response to a protein antigen

Li, Y.Li, H.Yang, F.Smith-Gill, S.J.Mariuzza, R.A.

(2003) Nat Struct Biol 10: 482-488

  • DOI: https://doi.org/10.1038/nsb930
  • Primary Citation of Related Structures:  
    1NDG, 1NDM

  • PubMed Abstract: 

    The process whereby the immune system generates antibodies of higher affinities during a response to antigen (affinity maturation) is a prototypical example of molecular evolution. Earlier studies have been confined to antibodies specific for small molecules (haptens) rather than for proteins. We compare the structures of four antibodies bound to the same site on hen egg white lysozyme (HEL) at different stages of affinity maturation. These X-ray snapshots reveal that binding is enhanced, not through the formation of additional hydrogen bonds or van der Waals contacts or by an increase in total buried surface, but by burial of increasing amounts of apolar surface at the expense of polar surface, accompanied by improved shape complementarity. The increase in hydrophobic interactions results from highly correlated rearrangements in antibody residues at the interface periphery, adjacent to the central energetic hot spot. This first visualization of the maturation of antibodies to protein provides insights into the evolution of high affinity in other protein-protein interfaces.


  • Organizational Affiliation

    Center for Advanced Research in Biotechnology, W.M. Keck Laboratory for Structural Biology, University of Maryland Biotechnology Institute, 9600 Gudelsky Drive, Rockville, Maryland 20850, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
antibody kappa light chain214Mus musculusMutation(s): 0 
UniProt
Find proteins for P01837 (Mus musculus)
Explore P01837 
Go to UniProtKB:  P01837
Entity Groups  
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UniProt GroupP01837
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
immunoglobulin gamma 1 chain210Mus musculusMutation(s): 0 
UniProt
Find proteins for P01865 (Mus musculus)
Explore P01865 
Go to UniProtKB:  P01865
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UniProt GroupP01865
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Lysozyme C129Gallus gallusMutation(s): 1 
EC: 3.2.1.17
UniProt
Find proteins for P00698 (Gallus gallus)
Explore P00698 
Go to UniProtKB:  P00698
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00698
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ACY
Query on ACY

Download Ideal Coordinates CCD File 
D [auth B]ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.87α = 90
b = 89.87β = 90
c = 148.963γ = 90
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-03
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references, Derived calculations