1FUI

L-FUCOSE ISOMERASE FROM ESCHERICHIA COLI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and mechanism of L-fucose isomerase from Escherichia coli.

Seemann, J.E.Schulz, G.E.

(1997) J.Mol.Biol. 273: 256-268

  • DOI: 10.1006/jmbi.1997.1280

  • PubMed Abstract: 
  • The three-dimensional structure of L-fucose isomerase from Escherichia coli has been determined by X-ray crystallography at 2.5 A resolution. This ketol isomerase converts the aldose L-fucose into the corresponding ketose L-fuculose using Mn2+ as a c ...

    The three-dimensional structure of L-fucose isomerase from Escherichia coli has been determined by X-ray crystallography at 2.5 A resolution. This ketol isomerase converts the aldose L-fucose into the corresponding ketose L-fuculose using Mn2+ as a cofactor. Being a hexamer with 64,976 Da per subunit, L-fucose isomerase is the largest structurally known ketol isomerase. The enzyme shows neither sequence nor structural similarity with other ketol isomerases. The hexamer obeys D3 symmetry and forms the crystallographic asymmetric unit. The strict and favorably oriented local symmetry allowed for a computational phase extension from 7.3 A to 2.5 A resolution. The structure was solved with an L-fucitol molecule bound to the catalytic center such that the hydroxyl groups at positions 1 and 2 are ligands of the manganese ion. Most likely, L-fucitol mimics a bound L-fucose molecule in its open chain form. The protein environment suggests strongly that the reaction belongs to the ene-diol type.


    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg im Breisgau, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-FUCOSE ISOMERASE
A, B, C, D, E, F
591Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fucI
EC: 5.3.1.25
Find proteins for P69922 (Escherichia coli (strain K12))
Go to UniProtKB:  P69922
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, B, C, D, E
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
FOC
Query on FOC

Download SDF File 
Download CCD File 
A, B, C, D, E, F
FUCITOL
C6 H14 O5
SKCKOFZKJLZSFA-KCDKBNATSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.162 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 127.300α = 90.00
b = 128.300β = 90.00
c = 239.400γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
DENZOdata reduction
X-PLORrefinement
CCP4data scaling
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-10-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance