1DOS | pdb_00001dos

STRUCTURE OF FRUCTOSE-BISPHOSPHATE ALDOLASE

• PDB DOI: https://doi.org/10.2210/pdb1DOS/pdb

• Classification: LYASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1996-06-24 Released: 1997-07-07 
• Deposition Author(s): Blom, N., Tetreault, S., Coulombe, R., Sygusch, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.67 Å
• R-Value Free: 
  0.204 (Depositor) 
• R-Value Work: 
  0.171 (Depositor) 
• R-Value Observed: 
  0.171 (Depositor) 

Literature

Novel active site in Escherichia coli fructose 1,6-bisphosphate aldolase.

Blom, N.S., Tetreault, S., Coulombe, R., Sygusch, J.

(1996) Nat Struct Biol 3: 856-862

• PubMed: 8836102 
• DOI: https://doi.org/10.1038/nsb1096-856
• Primary Citation Related Structures: 
  1DOS


• PubMed Abstract: 
  

  The molecular architecture of the Class II E. coli fructose 1,6-bisphosphate aldolase dimer was determined to 1.6 A resolution. The subunit fold corresponds to a singly wound alpha/beta-barrel with an active site located on the beta-barrel carboxyl side of each subunit. In each subunit there are two mutually exclusive zinc metal ion binding sites, 3.2 A apart; the exclusivity is mediated by a conformational transition involving side-chain rotations by chelating histidine residues. A binding site for K+ and NH4+ activators was found near the beta-barrel centre. Although Class I and Class II aldolases catalyse identical reactions, their active sites do not share common amino acid residues, are structurally dissimilar, and from sequence comparisons appear to be evolutionary distinct.

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Organizational Affiliation: 
• Départment de biochimie, Université de Montréal, Canada.

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: 78.23 kDa 
• Atom Count: 7,281 
• Modeled Residue Count: 716 
• Deposited Residue Count: 716 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALDOLASE CLASS II	A, B	358	Escherichia coli	Mutation(s): 0  EC: 4.1.2.13
UniProt
Find proteins for P0AB71 (Escherichia coli (strain K12)) Explore P0AB71  Go to UniProtKB:  P0AB71

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], E [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
NH4	D [auth A], F [auth B]	AMMONIUM ION H4 N QGZKDVFQNNGYKY-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.67 Å
• R-Value Free:  0.204 (Depositor) 
• R-Value Work:  0.171 (Depositor) 
• R-Value Observed: 0.171 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.53	α = 90
b = 73.38	β = 106.6
c = 57.8	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
SDMS	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-07-07 
Deposition Author(s): Blom, N., Tetreault, S., Coulombe, R., Sygusch, J.

Revision History  

• Version 1.0: 1997-07-07
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other