1A4J

DIELS ALDER CATALYTIC ANTIBODY GERMLINE PRECURSOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Immunological origins of binding and catalysis in a Diels-Alderase antibody.

Romesberg, F.E.Spiller, B.Schultz, P.G.Stevens, R.C.

(1998) Science 279: 1929-1933

  • Primary Citation of Related Structures:  1A4K

  • PubMed Abstract: 
  • The three-dimensional structure of an antibody (39-A11) that catalyzes a Diels-Alder reaction has been determined. The structure suggests that the antibody catalyzes this pericyclic reaction through a combination of packing and hydrogen-bonding inter ...

    The three-dimensional structure of an antibody (39-A11) that catalyzes a Diels-Alder reaction has been determined. The structure suggests that the antibody catalyzes this pericyclic reaction through a combination of packing and hydrogen-bonding interactions that control the relative geometries of the bound substrates and electronic distribution in the dienophile. A single somatic mutation, serine-91 of the light chain to valine, is largely responsible for the increase in affinity and catalytic activity of the affinity-matured antibody. Structural and functional studies of the germ-line precursor suggest that 39-A11 and related antibodies derive from a family of germ-line genes that have been selected throughout evolution for the ability of the encoded proteins to form a polyspecific combining site. Germ line-encoded antibodies of this type, which can rapidly evolve into high-affinity receptors for a broad range of structures, may help to expand the binding potential associated with the structural diversity of the primary antibody repertoire.


    Organizational Affiliation

    Howard Hughes Medical Institute and the Department of Chemistry, University of California, Berkeley, CA 94720, USA. 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMMUNOGLOBULIN, DIELS ALDER CATALYTIC ANTIBODY (LIGHT CHAIN)
L, A
217Homo sapiensGene Names: IGKC
Find proteins for P01834 (Homo sapiens)
Go to UniProtKB:  P01834
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
IMMUNOGLOBULIN, DIELS ALDER CATALYTIC ANTIBODY (HEAVY CHAIN)
H, B
219N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 158.900α = 90.00
b = 49.330β = 108.74
c = 145.000γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-05-13
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance