1UCW

COMPLEX OF TRANSALDOLASE WITH THE REDUCED SCHIFF-BASE INTERMEDIATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the reduced Schiff-base intermediate complex of transaldolase B from Escherichia coli: mechanistic implications for class I aldolases.

Jia, J.Schorken, U.Lindqvist, Y.Sprenger, G.A.Schneider, G.

(1997) Protein Sci. 6: 119-124

  • DOI: 10.1002/pro.5560060113

  • PubMed Abstract: 
  • Transaldolase catalyzes transfer of a dihydroxyacetone moiety from a ketose donor to an aldose acceptor. During catalysis, a Schiff-base intermediate between dihydroxyacetone and the epsilon-amino group of a lysine residue at the active site of the e ...

    Transaldolase catalyzes transfer of a dihydroxyacetone moiety from a ketose donor to an aldose acceptor. During catalysis, a Schiff-base intermediate between dihydroxyacetone and the epsilon-amino group of a lysine residue at the active site of the enzyme is formed. This Schiff-base intermediate has been trapped by reduction with potassium borohydride, and the crystal structure of this complex has been determined at 2.2 A resolution. The overall structures of the complex and the native enzyme are very similar; formation of the intermediate induces no large conformational changes. The dihydroxyacetone moiety is covalently linked to the side chain of Lys 132 at the active site of the enzyme. The Cl hydroxyl group of the dihydroxyacetone moiety forms hydrogen bonds to the side chains of residues Asn 154 and Ser 176. The C3 hydroxyl group interacts with the side chain of Asp 17 and Asn 35. Based on the crystal structure of this complex a reaction mechanism for transaldolase is proposed.


    Related Citations: 
    • Crystal Structure of Transaldolase B from Escherichia Coli Suggests a Circular Permutation of the Alpha/Beta Barrel within the Class I Aldolase Family
      Jia, J.,Huang, W.,Schorken, U.,Sahm, H.,Sprenger, G.A.,Lindqvist, Y.,Schneider, G.
      (1996) Structure 4: 715
    • Crystallization and Preliminary X-Ray Crystallographic Analysis of Recombinant Transaldolase B from Escherichia Coli
      Jia, J.,Lindqvist, Y.,Schneider, G.,Schorken, U.,Sahm, H.,Sprenger, G.A.
      (1996) Acta Crystallogr.,Sect.D 52: 192


    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSALDOLASE
A, B
317Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: talB (yaaK)
EC: 2.2.1.2
Find proteins for P0A870 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A870
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LLY
Query on LLY
A, B
L-PEPTIDE LINKINGC9 H16 N2 O6LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.204 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.200α = 90.00
b = 91.900β = 90.00
c = 130.900γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
X-PLORmodel building
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance