1DXE

2-dehydro-3-deoxy-galactarate aldolase from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structures of the Metal-Dependent 2-Dehydro-3-Deoxy-Galactarate Aldolase Suggest a Novel Reaction Mechanism.

Izard, T.Blackwell, N.C.

(2000) EMBO J 19: 3849

  • DOI: 10.1093/emboj/19.15.3849
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Carbon-carbon bond formation is an essential reaction in organic chemistry and the use of aldolase enzymes for the stereochemical control of such reactions is an attractive alternative to conventional chemical methods. Here we describe the crystal st ...

    Carbon-carbon bond formation is an essential reaction in organic chemistry and the use of aldolase enzymes for the stereochemical control of such reactions is an attractive alternative to conventional chemical methods. Here we describe the crystal structures of a novel class II enzyme, 2-dehydro-3-deoxy-galactarate (DDG) aldolase from Escherichia coli, in the presence and absence of substrate. The crystal structure was determined by locating only four Se sites to obtain phases for 506 protein residues. The protomer displays a modified (alpha/beta)(8) barrel fold, in which the eighth alpha-helix points away from the beta-barrel instead of packing against it. Analysis of the DDG aldolase crystal structures suggests a novel aldolase mechanism in which a phosphate anion accepts the proton from the methyl group of pyruvate.


    Organizational Affiliation

    Department of Biochemistry, University of Leicester, Leicester LE1 7RH, UK. Tina.Izard@stjude.org



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2-DEHYDRO-3-DEOXY-GALACTARATE ALDOLASE
A, B
256Escherichia coliMutation(s): 0 
EC: 4.1.2.20
Find proteins for P23522 (Escherichia coli (strain K12))
Go to UniProtKB:  P23522
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
MG
Query on MG

Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.07α = 90
b = 129.07β = 90
c = 167.96γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-25
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance