1x7n

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[[Image:1x7n.gif|left|200px]]<br /><applet load="1x7n" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:1x7n.gif|left|200px]]
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caption="1x7n, resolution 1.89&Aring;" />
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'''The crystal structure of Pyrococcus furiosus phosphoglucose isomerase with bound 5-phospho-D-arabinonate and Manganese'''<br />
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{{Structure
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|PDB= 1x7n |SIZE=350|CAPTION= <scene name='initialview01'>1x7n</scene>, resolution 1.89&Aring;
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|SITE=
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|LIGAND= <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene> and <scene name='pdbligand=PA5:5-PHOSPHOARABINONIC ACID'>PA5</scene>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Glucose-6-phosphate_isomerase Glucose-6-phosphate isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.1.9 5.3.1.9]
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|GENE= pgiA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2261 Pyrococcus furiosus])
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}}
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'''The crystal structure of Pyrococcus furiosus phosphoglucose isomerase with bound 5-phospho-D-arabinonate and Manganese'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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1X7N is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus] with <scene name='pdbligand=MN:'>MN</scene> and <scene name='pdbligand=PA5:'>PA5</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Glucose-6-phosphate_isomerase Glucose-6-phosphate isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.1.9 5.3.1.9] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X7N OCA].
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1X7N is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X7N OCA].
==Reference==
==Reference==
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The structures of inhibitor complexes of Pyrococcus furiosus phosphoglucose isomerase provide insights into substrate binding and catalysis., Berrisford JM, Akerboom J, Brouns S, Sedelnikova SE, Turnbull AP, van der Oost J, Salmon L, Hardre R, Murray IA, Blackburn GM, Rice DW, Baker PJ, J Mol Biol. 2004 Oct 22;343(3):649-57. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15465052 15465052]
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The structures of inhibitor complexes of Pyrococcus furiosus phosphoglucose isomerase provide insights into substrate binding and catalysis., Berrisford JM, Akerboom J, Brouns S, Sedelnikova SE, Turnbull AP, van der Oost J, Salmon L, Hardre R, Murray IA, Blackburn GM, Rice DW, Baker PJ, J Mol Biol. 2004 Oct 22;343(3):649-57. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15465052 15465052]
[[Category: Glucose-6-phosphate isomerase]]
[[Category: Glucose-6-phosphate isomerase]]
[[Category: Pyrococcus furiosus]]
[[Category: Pyrococcus furiosus]]
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[[Category: pyrococcus furiosus]]
[[Category: pyrococcus furiosus]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:51:50 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:06:03 2008''

Revision as of 13:06, 20 March 2008

Image:1x7n.gif


PDB ID 1x7n

Drag the structure with the mouse to rotate
, resolution 1.89Å
Ligands: and
Gene: pgiA (Pyrococcus furiosus)
Activity: Glucose-6-phosphate isomerase, with EC number 5.3.1.9
Coordinates: save as pdb, mmCIF, xml



The crystal structure of Pyrococcus furiosus phosphoglucose isomerase with bound 5-phospho-D-arabinonate and Manganese


Overview

Pyrococcus furiosus phosphoglucose isomerase (PfPGI) is a metal-containing enzyme that catalyses the interconversion of glucose 6-phosphate (G6P) and fructose 6-phosphate (F6P). The recent structure of PfPGI has confirmed the hypothesis that the enzyme belongs to the cupin superfamily and identified the position of the active site. This fold is distinct from the alphabetaalpha sandwich fold commonly seen in phosphoglucose isomerases (PGIs) that are found in bacteria, eukaryotes and some archaea. Whilst the mechanism of the latter family is thought to proceed through a cis-enediol intermediate, analysis of the structure of PfPGI in the presence of inhibitors has led to the suggestion that the mechanism of this enzyme involves the metal-dependent direct transfer of a hydride between C1 and C2 atoms of the substrate. To gain further insight in the reaction mechanism of PfPGI, the structures of the free enzyme and the complexes with the inhibitor, 5-phospho-d-arabinonate (5PAA) in the presence and absence of metal have been determined. Comparison of these structures with those of equivalent complexes of the eukaryotic PGIs reveals similarities at the active site in the disposition of possible catalytic residues. These include the presence of a glutamic acid residue, Glu97 in PfPGI, which occupies the same position relative to the inhibitor as that of the glutamate that is thought to function as the catalytic base in the eukaryal-type PGIs. These similarities suggest that aspects of the catalytic mechanisms of these two structurally unrelated PGIs may be similar and based on an enediol intermediate.

About this Structure

1X7N is a Single protein structure of sequence from Pyrococcus furiosus. Full crystallographic information is available from OCA.

Reference

The structures of inhibitor complexes of Pyrococcus furiosus phosphoglucose isomerase provide insights into substrate binding and catalysis., Berrisford JM, Akerboom J, Brouns S, Sedelnikova SE, Turnbull AP, van der Oost J, Salmon L, Hardre R, Murray IA, Blackburn GM, Rice DW, Baker PJ, J Mol Biol. 2004 Oct 22;343(3):649-57. PMID:15465052

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