4AMV

E.COLI GLUCOSAMINE-6P SYNTHASE IN COMPLEX WITH FRUCTOSE-6P

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

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Literature

Glutamine Binding Opens the Ammonia Channel and Activates Glucosamine-6P 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:  
    2J6H, 4AMV

  • 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 at 2 ...

    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
    • Ordering of C-Terminal Loop and Glutaminase Domains of Glucosamine-6-Phosphate Synthase Promotes Sugar Ring Opening and Formation of the Ammonia Channel.
      Mouilleron, S., Badet-Denisot, M., Golinelli-Pimpaneau, B.
      (2008) J Mol Biol 377: 1174
    • Dynamics of Glucosamine-6-Phosphate Synthase Catalysis.
      Mouilleron, S., Badet-Denisot, M., Badet, B., Golinelli-Pimpaneau, B.
      (2011) Arch Biochem Biophys 505: 1
    Organizational Affiliation: 

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



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GLUCOSAMINE--FRUCTOSE-6-PHOSPHATE AMINOTRANSFERASE [ISOMER IZING]A, B, C609Escherichia coliMutation(s): 0 
EC: 2.6.1.16
UniProt
Find proteins for P17169 (Escherichia coli (strain K12))
Explore P17169 
Go to UniProtKB:  P17169
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17169
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
F6R
Query on F6R
Download Ideal Coordinates CCD File 
D [auth A],
E [auth B],
F [auth C]		FRUCTOSE -6-PHOSPHATE
C6 H13 O9 P
GSXOAOHZAIYLCY-HSUXUTPPSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.197α = 90
b = 109.677β = 97.11
c = 176.332γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-24
    Type: Initial release