2J6H

E. coli glucosamine-6-P synthase in complex with glucose-6P and 5-oxo- L-norleucine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Glutamine Binding Opens the Ammonia Channel and Activates Glucosamine-6-Phosphate Synthase.

Mouilleron, S.Badet-Denisot, M.A.Golinelli-Pimpaneau, B.

(2006) J.Biol.Chem. 281: 4404

  • DOI: 10.1074/jbc.M511689200
  • Primary Citation of Related Structures:  
  • Also Cited By: 2VF5

  • PubMed Abstract: 
  • Glucosamine-6P synthase catalyzes the synthesis of glucosamine-6P from fructose-6P and glutamine and uses a channel to transfer ammonia from its glutaminase to its synthase active site. X-ray structures of glucosamine-6P synthase have been determined ...

    Glucosamine-6P synthase catalyzes the synthesis of glucosamine-6P from fructose-6P and glutamine and uses a channel to transfer ammonia from its glutaminase to its synthase active site. X-ray structures of glucosamine-6P synthase have been determined at 2.05 Angstroms resolution in the presence of fructose-6P and at 2.35 Angstroms resolution in the presence of fructose-6P and 6-diazo-5-oxo-L-norleucine, a glutamine affinity analog that covalently modifies the N-terminal catalytic cysteine, therefore mimicking the gamma-glutamyl-thioester intermediate formed during hydrolysis of glutamine. The fixation of the glutamine analog activates the enzyme through several major structural changes: 1) the closure of a loop to shield the glutaminase site accompanied by significant domain hinging, 2) the activation of catalytic residues involved in glutamine hydrolysis, i.e. the alpha-amino group of Cys-1 and Asn-98 that is positioned to form the oxyanion hole, and 3) a 75 degrees rotation of the Trp-74 indole group that opens the ammonia channel.


    Related Citations: 
    • Domain Motions of Glucosamine-6P Synthase: Comparison of the Anisotropic Displacements in the Crystals and the Catalytic Hinge-Bending Rotation.
      Mouilleron, S.,Golinelli-Pimpaneau, B.
      (2007) Protein Sci. 16: 485


    Organizational Affiliation

    Laboratoire d'Enzymologie et de Biochimie Structurales, Unite Propre de Recherche 9063, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUCOSAMINE-FRUCTOSE-6-PHOSPHATE AMINOTRANSFERASE
A, B
608Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: glmS
EC: 2.6.1.16
Find proteins for P17169 (Escherichia coli (strain K12))
Go to UniProtKB:  P17169
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
G6Q
Query on G6Q

Download SDF File 
Download CCD File 
A, B
GLUCOSE-6-PHOSPHATE
C6 H13 O9 P
VFRROHXSMXFLSN-SLPGGIOYSA-N
 Ligand Interaction
ONL
Query on ONL

Download SDF File 
Download CCD File 
A, B
5-OXO-L-NORLEUCINE
C6 H11 N O3
KSIJECNNZVKMJG-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 83.300α = 90.00
b = 91.230β = 90.00
c = 184.990γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
REFMACrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance