1HOR

STRUCTURE AND CATALYTIC MECHANISM OF GLUCOSAMINE 6-PHOSPHATE DEAMINASE FROM ESCHERICHIA COLI AT 2.1 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1HOR/pdb

• Classification: INTRAMOLECULAR OXIDOREDUCTASE DEAMINASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-09-13 Released: 1996-01-29 
• Deposition Author(s): Oliva, G., Fontes, M.R.M., Garratt, R.C., Altamirano, M.M., Calcagno, M.L., Horjales, E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.165 
• R-Value Observed: 0.165 

Literature

Structure and catalytic mechanism of glucosamine 6-phosphate deaminase from Escherichia coli at 2.1 A resolution.

Oliva, G., Fontes, M.R., Garratt, R.C., Altamirano, M.M., Calcagno, M.L., Horjales, E.

(1995) Structure 3: 1323-1332

• PubMed: 8747459 
• DOI: https://doi.org/10.1016/s0969-2126(01)00270-2
• Primary Citation of Related Structures:  
  1DEA, 1HOR


• PubMed Abstract: 
  

  Glucosamine 6-phosphate deaminase from Escherichia coli is an allosteric hexameric enzyme which catalyzes the reversible conversion of D-glucosamine 6-phosphate into D-fructose 6-phosphate and ammonium ion and is activated by N-acetyl-D-glucosamine 6-phosphate. Mechanistically, it belongs to the group of aldoseketose isomerases, but its reaction also accomplishes a simultaneous amination/deamination. The determination of the structure of this protein provides fundamental knowledge for understanding its mode of action and the nature of allosteric conformational changes that regulate its function.

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Organizational Affiliation: 

Instituto de Fisica de São Carlos, Universidade de São Paulo, Brazil.

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 60.34 kDa 
• Atom Count: 4,442 
• Modelled Residue Count: 532 
• Deposited Residue Count: 532 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GLUCOSAMINE 6-PHOSPHATE DEAMINASE	A, B	266	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0A759 (Escherichia coli (strain K12)) Explore P0A759  Go to UniProtKB:  P0A759

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AGP	D [auth A], F [auth B]	2-DEOXY-2-AMINO GLUCITOL-6-PHOSPHATE C6 H16 N O8 P LBNVXZROMBUNNQ-SLPGGIOYSA-N
PO4	C [auth A], E [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.165 
• R-Value Observed: 0.165 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 125.71	α = 90
b = 125.71	β = 90
c = 222.87	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-01-29 
Deposition Author(s): Oliva, G., Fontes, M.R.M., Garratt, R.C., Altamirano, M.M., Calcagno, M.L., Horjales, E.

Revision History  

• Version 1.0: 1996-01-29
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other