1fpl: Difference between revisions
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|PDB= 1fpl |SIZE=350|CAPTION= <scene name='initialview01'>1fpl</scene>, resolution 2.3Å | |PDB= 1fpl |SIZE=350|CAPTION= <scene name='initialview01'>1fpl</scene>, resolution 2.3Å | ||
|SITE= <scene name='pdbsite=AC1:Active+Site+In+The+Monomer+Composed+Of+Chains+A'>AC1</scene>, <scene name='pdbsite=AC2:Active+Site+In+The+Monomer+Composed+Of+Chains+B'>AC2</scene>, <scene name='pdbsite=AM1:Amp+Binding+Site+In+The+Monomer+Composed+Of+Chains+A'>AM1</scene>, <scene name='pdbsite=AM2:Amp+Binding+Site+In+The+Monomer+Composed+Of+Chains+B'>AM2</scene>, <scene name='pdbsite=TH1:First+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH1</scene>, <scene name='pdbsite=TH2:First+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH2</scene>, <scene name='pdbsite=TH3:Second+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH3</scene>, <scene name='pdbsite=TH4:Second+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH4</scene>, <scene name='pdbsite=TH5:Third+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH5</scene> and <scene name='pdbsite=TH6:Third+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH6</scene> | |SITE= <scene name='pdbsite=AC1:Active+Site+In+The+Monomer+Composed+Of+Chains+A'>AC1</scene>, <scene name='pdbsite=AC2:Active+Site+In+The+Monomer+Composed+Of+Chains+B'>AC2</scene>, <scene name='pdbsite=AM1:Amp+Binding+Site+In+The+Monomer+Composed+Of+Chains+A'>AM1</scene>, <scene name='pdbsite=AM2:Amp+Binding+Site+In+The+Monomer+Composed+Of+Chains+B'>AM2</scene>, <scene name='pdbsite=TH1:First+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH1</scene>, <scene name='pdbsite=TH2:First+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH2</scene>, <scene name='pdbsite=TH3:Second+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH3</scene>, <scene name='pdbsite=TH4:Second+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH4</scene>, <scene name='pdbsite=TH5:Third+Metal+Site+In+The+Monomer+Composed+Of+Chains+A'>TH5</scene> and <scene name='pdbsite=TH6:Third+Metal+Site+In+The+Monomer+Composed+Of+Chains+B'>TH6</scene> | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=AHG:2,5-ANHYDROGLUCITOL-1,6-BIPHOSPHATE'>AHG</scene>, <scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=TL:THALLIUM+(I)+ION'>TL</scene> | ||
|ACTIVITY= [http://en.wikipedia.org/wiki/Fructose-bisphosphatase Fructose-bisphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.11 3.1.3.11] | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Fructose-bisphosphatase Fructose-bisphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.11 3.1.3.11] </span> | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fpl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fpl OCA], [http://www.ebi.ac.uk/pdbsum/1fpl PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1fpl RCSB]</span> | |||
}} | }} | ||
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[[Category: Lipscomb, W N.]] | [[Category: Lipscomb, W N.]] | ||
[[Category: Villeret, V.]] | [[Category: Villeret, V.]] | ||
[[Category: carbohydrate metabolism]] | [[Category: carbohydrate metabolism]] | ||
[[Category: hydrolase]] | [[Category: hydrolase]] | ||
[[Category: phosphoric monoester]] | [[Category: phosphoric monoester]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:27:46 2008'' | ||
Revision as of 20:27, 30 March 2008
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| , resolution 2.3Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | , , , , , , , , and | ||||||
| Ligands: | , , | ||||||
| Activity: | Fructose-bisphosphatase, with EC number 3.1.3.11 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
FRUCTOSE-1,6-BISPHOSPHATASE (D-FRUCTOSE-1,6-BISPHOSPHATE 1-PHOSPHOHYDROLASE) COMPLEXED WITH AMP, 2,5-ANHYDRO-D-GLUCITOL-1,6-BISPHOSPHATE AND THALLIUM IONS (10 MM)
OverviewOverview
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.
About this StructureAbout this Structure
1FPL is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.
ReferenceReference
Crystallographic evidence for the action of potassium, thallium, and lithium ions on fructose-1,6-bisphosphatase., Villeret V, Huang S, Fromm HJ, Lipscomb WN, Proc Natl Acad Sci U S A. 1995 Sep 12;92(19):8916-20. PMID:7568043
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