2ZJ3

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

• PDB DOI: https://doi.org/10.2210/pdb2ZJ3/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-02-29 Released: 2009-01-13 
• Deposition Author(s): Nakaishi, Y., Bando, M., Kondo, K., Tsuge, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.217 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 

Starting Model: experimental

Literature

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

• PubMed: 19059404 
• 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.

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Organizational Affiliation: 

Medicinal Chemistry Research Institute, Otsuka Pharmaceutical Co. Ltd., Kawauchi-cho, Tokushima, Japan. [e-mail]

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 42.58 kDa 
• Atom Count: 3,159 
• Modelled Residue Count: 365 
• Deposited Residue Count: 375 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Glucosamine--fructose-6-phosphate aminotransferase [isomerizing] 1	A	375	Homo sapiens	Mutation(s): 0  EC: 2.6.1.16
UniProt & NIH Common Fund Data Resources
Find proteins for Q06210 (Homo sapiens) Explore Q06210  Go to UniProtKB:  Q06210
PHAROS:  Q06210 GTEx:  ENSG00000198380

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
G6P	B [auth A]	6-O-phosphono-alpha-D-glucopyranose C6 H13 O9 P NBSCHQHZLSJFNQ-DVKNGEFBSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 78.652	α = 90
b = 78.652	β = 90
c = 274.477	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-01-13 
Deposition Author(s): Nakaishi, Y., Bando, M., Kondo, K., Tsuge, H.

Revision History  

• 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