1KEM

CATALYTIC ANTIBODY 28B4 FAB FRAGMENT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Insights into antibody catalysis: structure of an oxygenation catalyst at 1.9-angstrom resolution.

Hsieh-Wilson, L.C.Schultz, P.G.Stevens, R.C.

(1996) Proc Natl Acad Sci U S A 93: 5363-5367

  • DOI: 10.1073/pnas.93.11.5363
  • Primary Citation of Related Structures:  
    1KEM, 1KEL

  • PubMed Abstract: 
  • The x-ray crystal structures of the sulfide oxidase antibody 28B4 and of antibody 28B4 complexed with hapten have been solved at 2.2-angstrom and 1.9-angstrom resolution, respectively. To our knowledge, these structures are the highest resolution cat ...

    The x-ray crystal structures of the sulfide oxidase antibody 28B4 and of antibody 28B4 complexed with hapten have been solved at 2.2-angstrom and 1.9-angstrom resolution, respectively. To our knowledge, these structures are the highest resolution catalytic antibody structures to date and provide insight into the molecular mechanism of this antibody-catalyzed monooxygenation reaction. Specifically, the data suggest that entropic restriction plays a fundamental role in catalysis through the precise alignment of the thioether substrate and oxidant. The antibody active site also stabilizes developing charge on both sulfur and periodate in the transition state via cation-pi and electrostatic interactions, respectively. In addition to demonstrating that the active site of antibody 28B4 does indeed reflect the mechanistic information programmed in the aminophosphonic acid hapten, these high-resolution structures provide a basis for enhancing turnover rates through mutagenesis and improved hapten design.


    Related Citations: 
    • An Efficient Antibody-Catalyzed Monooxygenation Reaction
      Hsieh, L.C., Stephans, J.C., Schultz, P.G.
      (1994) J Am Chem Soc 116: 2167

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
28B4 FABL217Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
28B4 FABH218Mus musculusMutation(s): 0 
Gene Names: Ighg1Igh-4
Find proteins for P01868 (Mus musculus)
Explore P01868 
Go to UniProtKB:  P01868
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.2α = 95.3
b = 58.6β = 103.2
c = 43.4γ = 93.6
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance