1NGW

Chimeric Affinity Matured Fab 7g12 complexed with mesoporphyrin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.275 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural evidence for substrate strain in antibody catalysis

Yin, J.Andryski, S.E.Beuscher IV, A.E.Stevens, R.C.Schultz, P.G.

(2003) Proc Natl Acad Sci U S A 100: 856-861

  • DOI: 10.1073/pnas.0235873100
  • Primary Citation of Related Structures:  
    1N7M, 1NGZ, 1NGY, 1NGX, 1NGW

  • PubMed Abstract: 
  • The crystal structure of the Michaelis complex between the Fab fragment of ferrochelatase antibody 7G12 and its substrate mesoporphyrin has been solved to 2.6-A resolution. The antibody-bound mesoporphyrin clearly adopts a nonplanar conformation and ...

    The crystal structure of the Michaelis complex between the Fab fragment of ferrochelatase antibody 7G12 and its substrate mesoporphyrin has been solved to 2.6-A resolution. The antibody-bound mesoporphyrin clearly adopts a nonplanar conformation and reveals that the antibody catalyzes the porphyrin metallation reaction by straining/distorting the bound substrate toward the transition-state configuration. The crystal structures of the Fab fragment of the germ-line precursor antibody to 7G12 and its complex with the hapten N-methylmesoporphyrin have also been solved. A comparison of these structures with the corresponding structures of the affinity-matured antibody 7G12 reveals the molecular mechanism by which the immune system evolves binding energy to catalyze this reaction.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mature Metal Chelatase Catalytic Antibody, Light chainAL213Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mature Metal Chelatase Catalytic Antibody, Heavy chainBH216Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: Ighv1-72
Find proteins for P06328 (Mus musculus)
Explore P06328 
Go to UniProtKB:  P06328
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MMP
Query on MMP

Download CCD File 
B, H
N-METHYLMESOPORPHYRIN
C35 H40 N4 O4
YNWHQWMCLCANDI-YIYRCNGCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
MMPKd :  20.700000762939453   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.275 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.721α = 90
b = 134.215β = 90
c = 72.951γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-02-04
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation