Isomerase domain of human glucose:fructose-6-phosphate amidotransferase

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

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Structural analysis of human glutamine:fructose-6-phosphate amidotransferase, a key regulator in type 2 diabetes

Nakaishi, Y.Bando, M.Shimizu, H.Watanabe, K.Goto, F.Tsuge, H.Kondo, K.Komatsu, M.

(2009) FEBS Lett 583: 163-167

  • DOI: https://doi.org/10.1016/j.febslet.2008.11.041
  • Primary Citation of Related Structures:  
    2ZJ3, 2ZJ4

  • PubMed Abstract: 

    Glutamine:fructose-6-phosphate amidotransferase (GFAT) is a rate-limiting enzyme in the hexoamine biosynthetic pathway and plays an important role in type 2 diabetes. We now report the first structures of the isomerase domain of the human GFAT in the presence of cyclic glucose-6-phosphate and linear glucosamine-6-phosphate. The C-terminal tail including the active site displays a rigid conformation, similar to the corresponding Escherichia coli enzyme. The diversity of the CF helix near the active site suggests the helix is a major target for drug design. Our study provides insights into the development of therapeutic drugs for type 2 diabetes.

  • Organizational Affiliation

    Medicinal Chemistry Research Institute, Otsuka Pharmaceutical Co. Ltd., Kawauchi-cho, Tokushima, Japan. y_nakaishi@research.otsuka.co.jp

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glucosamine--fructose-6-phosphate aminotransferase [isomerizing] 1375Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q06210 (Homo sapiens)
Explore Q06210 
Go to UniProtKB:  Q06210
PHAROS:  Q06210
GTEx:  ENSG00000198380 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06210
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on G6P

Download Ideal Coordinates CCD File 
B [auth A]6-O-phosphono-alpha-D-glucopyranose
C6 H13 O9 P
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.652α = 90
b = 78.652β = 90
c = 274.477γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Refinement description, Structure summary