1fpy

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[[Image:1fpy.gif|left|200px]]
 
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==CRYSTAL STRUCTURE OF GLUTAMINE SYNTHETASE FROM SALMONELLA TYPHIMURIUM WITH INHIBITOR PHOSPHINOTHRICIN==
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The line below this paragraph, containing "STRUCTURE_1fpy", creates the "Structure Box" on the page.
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<StructureSection load='1fpy' size='340' side='right'caption='[[1fpy]], [[Resolution|resolution]] 2.89&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1fpy]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. The June 2002 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Glutamine Synthetase'' by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2002_6 10.2210/rcsb_pdb/mom_2002_6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FPY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FPY FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.89&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PPQ:PHOSPHINOTHRICIN'>PPQ</scene></td></tr>
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{{STRUCTURE_1fpy| PDB=1fpy | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1fpy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fpy OCA], [https://pdbe.org/1fpy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fpy RCSB], [https://www.ebi.ac.uk/pdbsum/1fpy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fpy ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/GLN1B_SALTY GLN1B_SALTY] Catalyzes the ATP-dependent biosynthesis of glutamine from glutamate and ammonia.<ref>PMID:7727369</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fp/1fpy_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1fpy ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE OF GLUTAMINE SYNTHETASE FROM SALMONELLA TYPHIMURIUM WITH INHIBITOR PHOSPHINOTHRICIN'''
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==See Also==
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*[[Glutamine synthetase 3D structures|Glutamine synthetase 3D structures]]
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== References ==
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==Overview==
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<references/>
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Phosphinothricin is a potent inhibitor of the enzyme glutamine synthetase (GS). The resolution of the native structure of GS from Salmonella typhimurium has been extended to 2.5 A resolution, and the improved model is used to determine the structure of phosphinothricin complexed to GS by difference Fourier methods. The structure suggests a noncovalent, dead-end mechanism of inhibition. Phosphinothricin occupies the glutamate substrate pocket and stabilizes the Glu327 flap in a position which blocks the glutamate entrance to the active site, trapping the inhibitor on the enzyme. One oxygen of the phosphinyl group of phosphinothricin appears to be protonated, because of its proximity to the carboxylate group of Glu327. The other phosphinyl oxygen protrudes into the negatively charged binding pocket for the substrate ammonium, disrupting that pocket. The distribution of charges in the glutamate binding pocket is complementary to those of phosphinothricin. The presence of a second ammonium binding site within the active site is confirmed by its analogue thallous ion, marking the ammonium site and its protein ligands. The inhibition of GS by methionine sulfoximine can be explained by the same mechanism. These models of inhibited GS further illuminate its catalytic mechanism.
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__TOC__
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</StructureSection>
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==About this Structure==
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1FPY is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. The following page contains interesting information on the relation of 1FPY with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb30_1.html Glutamine Synthetase]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FPY OCA].
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==Reference==
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The crystal structure of phosphinothricin in the active site of glutamine synthetase illuminates the mechanism of enzymatic inhibition., Gill HS, Eisenberg D, Biochemistry. 2001 Feb 20;40(7):1903-12. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11329256 11329256]
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[[Category: Glutamate--ammonia ligase]]
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[[Category: Glutamine Synthetase]]
[[Category: Glutamine Synthetase]]
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[[Category: Salmonella typhimurium]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: RCSB PDB Molecule of the Month]]
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[[Category: Eisenberg, D.]]
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[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
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[[Category: Gill, H S.]]
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[[Category: Eisenberg D]]
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[[Category: Glutamine synthetase]]
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[[Category: Gill HS]]
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[[Category: Inhibition]]
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[[Category: Phosphinothricin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:37:31 2008''
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Current revision

CRYSTAL STRUCTURE OF GLUTAMINE SYNTHETASE FROM SALMONELLA TYPHIMURIUM WITH INHIBITOR PHOSPHINOTHRICIN

PDB ID 1fpy

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