3FO9

Crystal structure of aldolase antibody 33F12 Fab' in complex with hapten 1,3-diketone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Direct observation of an enamine intermediate in amine catalysis

Zhu, X.Tanaka, F.Lerner, R.A.Barbas, C.F.Wilson, I.A.

(2009) J.Am.Chem.Soc. 131: 18206-18207

  • DOI: 10.1021/ja907271a

  • PubMed Abstract: 
  • An enamine intermediate is believed to be the central feature of biological catalysts, such as aldolases and small molecule amine organocatalysts. Despite decades of investigation of naturally occurring aldolase enzymes and recent studies on designed ...

    An enamine intermediate is believed to be the central feature of biological catalysts, such as aldolases and small molecule amine organocatalysts. Despite decades of investigation of naturally occurring aldolase enzymes and recent studies on designed aldolase antibodies and organocatalysts, direct structural observation of an enamine intermediate has proven to be rare. Herein, we report the observation of a stable enamine intermediate in the crystal structure of an aldolase antibody 33F12 in complex with a 1,3-diketone derivative. This enamine complex structure provides strong evidence that fewer residues are essential for amine catalysis within the hydrophobic environments of this catalytic antibody than speculated for natural aldolase enzymes and should serve to guide future studies aimed at the rational design of these types of catalysts, as well as organocatalysts. Indeed, enamine catalysis in proteins might be more simplistic than previously imagined.


    Organizational Affiliation

    Department of Chemistry, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin IGG2A - light chain
L, A
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Immunoglobulin IGG2A - heavy chain
H, B
218Mus musculusMutation(s): 0 
Gene Names: Igh-1a
Find proteins for P01865 (Mus musculus)
Go to UniProtKB:  P01865
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DIK
Query on DIK

Download SDF File 
Download CCD File 
B, H
5-{[4-(5-methyl-3-oxohex-4-en-1-yl)phenyl]amino}-5-oxopentanoic acid
C18 H23 N O4
SZAPYZUSRJAHQP-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.830α = 90.00
b = 81.038β = 90.00
c = 174.314γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-12-29 
  • Released Date: 2009-12-22 
  • Deposition Author(s): Zhu, X., Wilson, I.A.

Revision History 

  • Version 1.0: 2009-12-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description