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1pmt

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[[Image:1pmt.gif|left|200px]]<br /><applet load="1pmt" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1pmt, resolution 2.5&Aring;" />
 
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'''GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS'''<br />
 
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==Overview==
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==GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS==
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BACKGROUND: Glutathione S-transferases (GSTs) are a multifunctional group of enzymes, widely distributed in aerobic organisms, that have a critical role in the cellular detoxification process. Unlike their mammalian counterparts, bacterial GSTs often catalyze quite specific reactions, suggesting that their roles in bacteria might be different. The GST from Proteus mirabilis (PmGST B1-1) is known to bind certain antibiotics tightly and reduce the antimicrobial activity of beta-lactam drugs. Hence, bacterial GSTs may play a part in bacterial resistance towards antibiotics and are the subject of intense interest. RESULTS: Here we present the structure of a bacterial GST, PmGST B1-1, which has been determined from two different crystal forms. The enzyme adopts the canonical GST fold although it shares less than 20% sequence identity with GSTs from higher organisms. The most surprising aspect of the structure is the observation that the substrate, glutathione, is covalently bound to Cys 10 of the enzyme. In addition, the highly structurally conserved N-terminal domain is found to have an additional beta strand. CONCLUSIONS: The crystal structure of PmGST B1-1 has highlighted the importance of a cysteine residue in the catalytic cycle. Sequence analyses suggest that a number of other GSTs share this property, leading us to propose a new class of GSTs - the beta class. The data suggest that the in vivo role of the beta class GSTs could be as metabolic or redox enzymes rather than conjugating enzymes. Compelling evidence is presented that the theta class of GSTs evolved from an ancestral member of the thioredoxin superfamily.
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<StructureSection load='1pmt' size='340' side='right'caption='[[1pmt]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1pmt]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Proteus_mirabilis Proteus mirabilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PMT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PMT FirstGlance]. <br>
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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]] 2.5&#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=GSH:GLUTATHIONE'>GSH</scene></td></tr>
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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=1pmt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pmt OCA], [https://pdbe.org/1pmt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pmt RCSB], [https://www.ebi.ac.uk/pdbsum/1pmt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pmt ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/GST_PROMI GST_PROMI] Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles.
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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/pm/1pmt_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=1pmt ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1PMT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Proteus_mirabilis Proteus mirabilis] with <scene name='pdbligand=GTT:'>GTT</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Glutathione_transferase Glutathione transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.18 2.5.1.18] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PMT OCA].
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*[[Glutathione S-transferase 3D structures|Glutathione S-transferase 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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A mixed disulfide bond in bacterial glutathione transferase: functional and evolutionary implications., Rossjohn J, Polekhina G, Feil SC, Allocati N, Masulli M, De Illio C, Parker MW, Structure. 1998 Jun 15;6(6):721-34. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9655824 9655824]
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[[Category: Large Structures]]
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[[Category: Glutathione transferase]]
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[[Category: Proteus mirabilis]]
[[Category: Proteus mirabilis]]
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[[Category: Single protein]]
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[[Category: Allocati N]]
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[[Category: Allocati, N.]]
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[[Category: Diilio C]]
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[[Category: Diilio, C.]]
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[[Category: Feil SC]]
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[[Category: Feil, S C.]]
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[[Category: Masulli M]]
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[[Category: Masulli, M.]]
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[[Category: Parker MW]]
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[[Category: Parker, M W.]]
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[[Category: Polekhina G]]
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[[Category: Polekhina, G.]]
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[[Category: Rossjohn J]]
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[[Category: Rossjohn, J.]]
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[[Category: GTT]]
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[[Category: a putative oxidoreductase]]
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[[Category: glutathione-conjugating]]
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[[Category: transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:30:24 2008''
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Current revision

GLUTATHIONE TRANSFERASE FROM PROTEUS MIRABILIS

PDB ID 1pmt

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