1FPI

FRUCTOSE-1,6-BISPHOSPHATASE (D-FRUCTOSE-1,6-BISPHOSPHATE 1-PHOSPHOHYDROLASE) COMPLEXED WITH AMP, 2,5-ANHYDRO-D-GLUCITOL-1,6-BISPHOSPHATE AND POTASSIUM IONS (100 MM)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic evidence for the action of potassium, thallium, and lithium ions on fructose-1,6-bisphosphatase.

Villeret, V.Huang, S.Fromm, H.J.Lipscomb, W.N.

(1995) Proc.Natl.Acad.Sci.USA 92: 8916-8920

  • Primary Citation of Related Structures:  1FPJ, 1FPK, 1FPL

  • PubMed Abstract: 
  • Fructose-1,6-bisphosphatase (Fru-1,6-Pase; D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) requires two divalent metal ions to hydrolyze alpha-D-fructose 1,6-bisphosphate. Although not required for catalysis, monovalent cations modify th ...

    Fructose-1,6-bisphosphatase (Fru-1,6-Pase; D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) requires two divalent metal ions to hydrolyze alpha-D-fructose 1,6-bisphosphate. Although not required for catalysis, monovalent cations modify the enzyme activity; K+ and Tl+ ions are activators, whereas Li+ ions are inhibitors. Their mechanisms of action are still unknown. We report here crystallographic structures of pig kidney Fru-1,6-Pase complexed with K+, Tl+, or both Tl+ and Li+. In the T form Fru-1,6-Pase complexed with the substrate analogue 2,5-anhydro-D-glucitol 1,6-bisphosphate (AhG-1,6-P2) and Tl+ or K+ ions, three Tl+ or K+ binding sites are found. Site 1 is defined by Glu-97, Asp-118, Asp-121, Glu-280, and a 1-phosphate oxygen of AhG-1,6-P2; site 2 is defined by Glu-97, Glu-98, Asp-118, and Leu-120. Finally, site 3 is defined by Arg-276, Glu-280, and the 1-phosphate group of AhG-1,6-P2. The Tl+ or K+ ions at sites 1 and 2 are very close to the positions previously identified for the divalent metal ions. Site 3 is specific to K+ or Tl+. In the divalent metal ion complexes, site 3 is occupied by the guanidinium group of Arg-276. These observations suggest that Tl+ or K+ ions can substitute for Arg-276 in the active site and polarize the 1-phosphate group, thus facilitating nucleophilic attack on the phosphorus center. In the T form complexed with both Tl+ and Li+ ions, Li+ replaces Tl+ at metal site 1. Inhibition by lithium very likely occurs as it binds to this site, thus retarding turnover or phosphate release. The present study provides a structural basis for a similar mechanism of inhibition for inositol monophosphatase, one of the potential targets of lithium ions in the treatment of manic depression.


    Related Citations: 
    • Structural Similarities between Fructose-1,6-Bisphosphatase and Inositol Monophosphatase
      Zhang, Y.,Liang, J.Y.,Lipscomb, W.N.
      (1993) Biochem.Biophys.Res.Commun. 190: 1080
    • Crystallographic Studies of the Catalytic Mechanism of the Neutral Form of Fructose-1,6-Bisphosphatase
      Zhang, Y.,Liang, J.Y.,Huang, S.,Ke, H.,Lipscomb, W.N.
      (1993) Biochemistry 32: 1844
    • Structural Aspects of the Allosteric Inhibition of Fructose-1,6-Bisphosphatase by AMP: The Binding of Both the Substrate Analogue 2,5-Anhydro-D-Glucitol 1,6-Bisphosphate and Catalytic Metal Ions Monitored by X-Ray Crystallography
      Villeret, V.,Huang, S.,Zhang, Y.,Lipscomb, W.N.
      (1995) Biochemistry 34: 4307


    Organizational Affiliation

    Gibbs Chemical Laboratory Harvard University, Cambridge, MA 02138, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FRUCTOSE-1,6-BISPHOSPHATASE
A, B
335Sus scrofaGene Names: FBP1 (FBP)
EC: 3.1.3.11
Find proteins for P00636 (Sus scrofa)
Go to Gene View: FBP1
Go to UniProtKB:  P00636
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
AHG
Query on AHG

Download SDF File 
Download CCD File 
A, B
2,5-ANHYDROGLUCITOL-1,6-BIPHOSPHATE
C6 H14 O11 P2
WSMBXSQDFPTODV-JGWLITMVSA-N
 Ligand Interaction
AMP
Query on AMP

Download SDF File 
Download CCD File 
A, B
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
AMPIC50: 1300 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.199 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 61.200α = 90.00
b = 167.100β = 90.00
c = 80.000γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
XDSdata reduction
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-06-20
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance