2RCS

IMMUNOGLOBULIN 48G7 GERMLINE FAB-AFFINITY MATURATION OF AN ESTEROLYTIC ANTIBODY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insights into the evolution of an antibody combining site.

Wedemayer, G.J.Patten, P.A.Wang, L.H.Schultz, P.G.Stevens, R.C.

(1997) Science 276: 1665-1669

  • Primary Citation of Related Structures:  1AJ7

  • PubMed Abstract: 
  • The crystal structures of a germline antibody Fab fragment and its complex with hapten have been solved at 2.1 A resolution. These structures are compared with the corresponding crystal structures of the affinity-matured antibody, 48G7, which has a 3 ...

    The crystal structures of a germline antibody Fab fragment and its complex with hapten have been solved at 2.1 A resolution. These structures are compared with the corresponding crystal structures of the affinity-matured antibody, 48G7, which has a 30,000 times higher affinity for hapten as a result of nine replacement somatic mutations. Significant changes in the configuration of the combining site occur upon binding of hapten to the germline antibody, whereas hapten binds to the mature antibody by a lock-and-key fit mechanism. The reorganization of the combining site that was nucleated by hapten binding is further optimized by somatic mutations that occur up to 15 from bound hapten. These results suggest that the binding potential of the primary antibody repertoire may be significantly expanded by the ability of germline antibodies to adopt more than one combining-site configuration, with both antigen binding and somatic mutation stabilizing the configuration with optimal hapten complementarity.


    Related Citations: 
    • The Immunological Evolution of Catalysis
      Patten, P.A.,Gray, N.S.,Yang, P.L.,Marks, C.B.,Wedemayer, G.J.,Boniface, J.J.,Stevens, R.C.,Schultz, P.G.
      (1996) Science 271: 1086
    • A Genetic Approach to the Generation of Antibodies with Enhanced Catalytic Activities
      Lesley, S.A.,Patten, P.A.,Schultz, P.G.
      (1993) Proc.Natl.Acad.Sci.USA 90: 1160
    • Crystal Structures of the Free and Liganded Form of an Esterolytic Catalytic Antibody
      Wedemayer, G.J.,Wang, L.H.,Patten, P.A.,Schultz, P.G.,Stevens, R.C.
      (1997) J.Mol.Biol. 268: 390


    Organizational Affiliation

    Department of Chemistry, University of California, Berkeley, CA 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMMUNOGLOBULIN 48G7 GERMLINE FAB
L
214N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IMMUNOGLOBULIN 48G7 GERMLINE FAB
H
217Homo sapiensGene Names: IGHG1
Find proteins for P01857 (Homo sapiens)
Go to UniProtKB:  P01857
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 66.160α = 90.00
b = 75.550β = 90.00
c = 86.560γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
X-PLORrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-11-12
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance