Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

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

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

Macromolecule Content

• Total Structure Weight: 56.01 kDa 
• Atom Count: 4165 
• Modelled Residue Count: 504 
• Deposited Residue Count: 504 
• Unique protein chains: 1

1LBV

Crystal Structure of apo-form (P21) of dual activity FBPase/IMPase (AF2372) from Archaeoglobus fulgidus

• PDB DOI: 10.2210/pdb1LBV/pdb

• Classification: HYDROLASE
• Organism(s): Archaeoglobus fulgidus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-04-04 Released: 2002-05-22 
• Deposition Author(s): Stieglitz, K.A., Johnson, K.A., Yang, H., Roberts, M.F., Seaton, B.A., Head, J.F., Stec, B.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.273 
• R-Value Work: 0.203 
• R-Value Observed: 0.215 

Literature

Crystal structure of a dual activity IMPase/FBPase (AF2372) from Archaeoglobus fulgidus. The story of a mobile loop.

Stieglitz, K.A., Johnson, K.A., Yang, H., Roberts, M.F., Seaton, B.A., Head, J.F., Stec, B.

(2002) J Biol Chem 277: 22863-22874

• PubMed: 11940584 
• DOI: 10.1074/jbc.M201042200
• Primary Citation of Related Structures:  
  1LBV, 1LBW, 1LBX, 1LBY, 1LBZ


• PubMed Abstract: 
  

Several hyperthermophilic organisms contain an unusual phosphatase that has dual activity toward inositol monophosphates and fructose 1,6-bisphosphate. The structure of the second member of this family, an FBPase/IMPase from Archaeoglobus fulgidus (AF2372), has been solved. This enzyme shares many kinetic and structural similarities with that of a previously solved enzyme from Methanococcus jannaschii (MJ0109). It also shows some kinetic differences in divalent metal ion binding as well as structural variations at the dimer interface that correlate with decreased thermal stability. The availability of different crystal forms allowed us to investigate the effect of the presence of ligands on the conformation of a mobile catalytic loop independently of the crystal packing. This conformational variability in AF2372 is compared with that observed in other members of this structural family that are sensitive or insensitive to submillimolar concentrations of Li(+). This analysis provides support for the previously proposed mechanism of catalysis involving three metal ions. A direct correlation of the loop conformation with strength of Li(+) inhibition provides a useful system of classification for this extended family of enzymes.

---

Related Citations: 

• Crystal structure and catalytic mechanism of the MJ0109 gene product: a bifunctional enzyme with inositol monophosphatase and fructose 1,6-bisphosphatase activities.
  Johnson, K.A., Chen, L., Yang, H., Roberts, M.F., Stec, B.
  (2001) Biochemistry 40: 618

---

Organizational Affiliation: 

Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
fructose 1,6-bisphosphatase/inositol monophosphatase	A, B	252	Archaeoglobus fulgidus	Mutation(s): 0  Gene Names: AF2372 EC: 3.1.3.11 (PDB Primary Data), 3.1.3.25 (PDB Primary Data)
UniProt
Find proteins for O30298 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16)) Explore O30298  Go to UniProtKB:  O30298

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.273 
• R-Value Work: 0.203 
• R-Value Observed: 0.215 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.812	α = 90
b = 53.247	β = 105.05
c = 82.154	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
SHELXL-97	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-04-04 
• Released Date: 2002-05-22 
Deposition Author(s): Stieglitz, K.A., Johnson, K.A., Yang, H., Roberts, M.F., Seaton, B.A., Head, J.F., Stec, B.

Revision History  

• Version 1.0: 2002-05-22
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance